A viewset for viewing and editing Irrigation Systems.

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    "count": 468,
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        {
            "id": 151,
            "polity": {
                "id": 486,
                "name": "ir_susiana_formative",
                "long_name": "Formative Period",
                "start_year": -7200,
                "end_year": -7000
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "absent",
            "comment": null,
            "description": " \"the early settlers of the Susiana plain chose to settle on top of a low natural hill surrounded by shallow marshes at an elevation where dry farming was possible. Even today, when the region is much drier than it was in early Neolithic times, dry agriculture is still practiced as supplement.\" §REF§(Alizadeh 2009, Encyclopedia Iranica Online, <a class=\"external free\" href=\"http://www.iranicaonline.org/articles/coga-bonut-archaeological-site\" rel=\"nofollow\">http://www.iranicaonline.org/articles/coga-bonut-archaeological-site</a>)§REF§"
        },
        {
            "id": 152,
            "polity": {
                "id": 172,
                "name": "ir_il_khanate",
                "long_name": "Ilkhanate",
                "start_year": 1256,
                "end_year": 1339
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " qanats in Persia and irrigation canals in Iraq. however, under the Mongols many fell into disrepair and disuse.§REF§(Morgan 2015, 79-80) Morgan, David. 2015. Medieval Persia 1040-1797. Routledge.§REF§ Arch dams were constructed e.g. at Kibar (Kivar): \"the dam is 85 ft. high and 180 ft. long at the crest, the thickness of which is between 15 and 16 1/2 ft.\"§REF§(Bosworth et al. 1983, 868) Bosworth, CE. van Donzel, E. Lewis, B. Pellat, Ch. 1983. The Encyclopaedia of Islam. E.J. Brill§REF§ A gravity dam was built at Sawa.§REF§(Bosworth et al. 1983, 868) Bosworth, CE. van Donzel, E. Lewis, B. Pellat, Ch. 1983. The Encyclopaedia of Islam. E.J. Brill§REF§"
        },
        {
            "id": 153,
            "polity": {
                "id": 488,
                "name": "ir_susiana_a",
                "long_name": "Susiana A",
                "start_year": -6000,
                "end_year": -5700
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": true,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"If the earliest inhabitants of Eridu were Sumerians ... then it must be accepted that they made their homes in the plain only after having mastered irrigation techniques in their former abodes at the foot of the Zagros mountains, probably in Khuzistan.\"§REF§(Mellaart 1970, 287-288) Mellaart, J. in Edwards, I E S. Gadd, C J. Hammond, N G L. eds. 1970. The Cambridge Ancient History. Volumes 1-2. Cambridge University Press.§REF§ \"The quality of its ware, which was of the same quality as the best pottery from Samarra or Halaf, indicates that Eridu must have had a formative stage that remains unknown to us. This is either because it is still buried in situ, or because it developed elsewhere (Khuzistan?), and was subsequently brought to Eridu by groups already in possession of core production techniques. The latter, such as irrigated agriculture, are fully Neolithic in character, and were practised alongside fishing, which was prominent due to the settlement's location.\"§REF§(Leverani 2014, 49) Liverani, Mario. Tabatabai, Soraia trans. 2014. The Ancient Near East. History, society and economy. Routledge. London.§REF§ \"Although irrigation is implied beginning in the Early Village Period in some regions and possibly only in the Middle Village Period, if at all in others, it is obvious that not all sites are located with primary concern for surface water.\" According to periodization table Early Village period is 6000 BCE, Middle Village Period c4600 BCE.§REF§(Frank 1987, 84 + 17) Frank ed. 1987. The Archaeology of Western Iran. Smithsonian Institution Press. Washington, D.C.§REF§"
        },
        {
            "id": 154,
            "polity": {
                "id": 488,
                "name": "ir_susiana_a",
                "long_name": "Susiana A",
                "start_year": -6000,
                "end_year": -5700
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": true,
            "name": "Irrigation_system",
            "irrigation_system": "absent",
            "comment": null,
            "description": " \"If the earliest inhabitants of Eridu were Sumerians ... then it must be accepted that they made their homes in the plain only after having mastered irrigation techniques in their former abodes at the foot of the Zagros mountains, probably in Khuzistan.\"§REF§(Mellaart 1970, 287-288) Mellaart, J. in Edwards, I E S. Gadd, C J. Hammond, N G L. eds. 1970. The Cambridge Ancient History. Volumes 1-2. Cambridge University Press.§REF§ \"The quality of its ware, which was of the same quality as the best pottery from Samarra or Halaf, indicates that Eridu must have had a formative stage that remains unknown to us. This is either because it is still buried in situ, or because it developed elsewhere (Khuzistan?), and was subsequently brought to Eridu by groups already in possession of core production techniques. The latter, such as irrigated agriculture, are fully Neolithic in character, and were practised alongside fishing, which was prominent due to the settlement's location.\"§REF§(Leverani 2014, 49) Liverani, Mario. Tabatabai, Soraia trans. 2014. The Ancient Near East. History, society and economy. Routledge. London.§REF§ \"Although irrigation is implied beginning in the Early Village Period in some regions and possibly only in the Middle Village Period, if at all in others, it is obvious that not all sites are located with primary concern for surface water.\" According to periodization table Early Village period is 6000 BCE, Middle Village Period c4600 BCE.§REF§(Frank 1987, 84 + 17) Frank ed. 1987. The Archaeology of Western Iran. Smithsonian Institution Press. Washington, D.C.§REF§"
        },
        {
            "id": 155,
            "polity": {
                "id": 489,
                "name": "ir_susiana_b",
                "long_name": "Susiana B",
                "start_year": -5700,
                "end_year": -5100
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " Hajji Muhammad culture ca. 5800-5100 BCE \"facilitated the irrigated cultivation of grains and cattle farming\"§REF§(Leverani 2014, 49) Liverani, Mario. Tabatabai, Soraia trans. 2014. The Ancient Near East. History, society and economy. Routledge. London.§REF§ \"If the earliest inhabitants of Eridu were Sumerians ... then it must be accepted that they made their homes in the plain only after having mastered irrigation techniques in their former abodes at the foot of the Zagros mountains, probably in Khuzistan.\"§REF§(Mellaart 1970, 289) Mellaart, J. in Edwards, I E S. Gadd, C J. Hammond, N G L. eds. 1970. The Cambridge Ancient History. Volumes 1-2. Cambridge University Press.§REF§ \"Although irrigation is implied beginning in the Early Village Period in some regions and possibly only in the Middle Village Period, if at all in others, it is obvious that not all sites are located with primary concern for surface water.\" According to periodization table Early Village period is 6000 BCE, Middle Village Period c4600 BCE.§REF§(Frank 1987, 84 + 17) Frank ed. 1987. The Archaeology of Western Iran. Smithsonian Institution Press. Washington, D.C.§REF§"
        },
        {
            "id": 156,
            "polity": {
                "id": 491,
                "name": "ir_susiana_ubaid_2",
                "long_name": "Susiana - Late Ubaid",
                "start_year": -4700,
                "end_year": -4300
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " Hajji Muhammad culture ca. 5800-5100 BCE \"facilitated the irrigated cultivation of grains and cattle farming\"§REF§(Leverani 2014, 49) Liverani, Mario. Tabatabai, Soraia trans. 2014. The Ancient Near East. History, society and economy. Routledge. London.§REF§ Ubaid culture 5100-4000 BCE: \"The inhabitants of the Mesopotamian lowlands were the first to master, yet still on a local level, the construction of canals for the irrigation of areas which were not arable otherwise, and the drainage of excess water from marshes to drainage basins. As a result, the first fully-fledged agricultural settlements began to appear along irrigation canals.\"§REF§(Leverani 2014, 53) Liverani, Mario. Tabatabai, Soraia trans. 2014. The Ancient Near East. History, society and economy. Routledge. London.§REF§ \"Although irrigation is implied beginning in the Early Village Period in some regions and possibly only in the Middle Village Period, if at all in others, it is obvious that not all sites are located with primary concern for surface water.\" According to periodization table Early Village period is 6000 BCE, Middle Village Period c4600 BCE.§REF§(Frank 1987, 84 + 17) Frank ed. 1987. The Archaeology of Western Iran. Smithsonian Institution Press. Washington, D.C.§REF§"
        },
        {
            "id": 157,
            "polity": {
                "id": 490,
                "name": "ir_susiana_ubaid_1",
                "long_name": "Susiana - Early Ubaid",
                "start_year": -5100,
                "end_year": -4700
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"Like most of Mesopotamia, during its most stylistically unified period in the Ubaid 1-3 periods (5300-4600 BC), Susiana was occupied by small villages (2 hectares or less). Presumably, these villagers subsisted through irrigation agriculture and animal husbandry (Dollfus 1985; Hole 1985). Not until the middle of this period did one site, Choga Mish, increase rapidly in size to 11 hectares. The site for which the area is named, Susa, had not been founded yet.\" §REF§(Rothman 2001, 11-12)§REF§ Hajji Muhammad culture ca. 5800-5100 BCE \"facilitated the irrigated cultivation of grains and cattle farming\"§REF§(Leverani 2014, 49) Liverani, Mario. Tabatabai, Soraia trans. 2014. The Ancient Near East. History, society and economy. Routledge. London.§REF§ \"Although irrigation is implied beginning in the Early Village Period in some regions and possibly only in the Middle Village Period, if at all in others, it is obvious that not all sites are located with primary concern for surface water.\" According to periodization table Early Village period is 6000 BCE, Middle Village Period c4600 BCE.§REF§(Frank 1987, 84 + 17) Frank ed. 1987. The Archaeology of Western Iran. Smithsonian Institution Press. Washington, D.C.§REF§"
        },
        {
            "id": 158,
            "polity": {
                "id": 499,
                "name": "ir_elam_5",
                "long_name": "Elam - Kidinuid Period",
                "start_year": -1500,
                "end_year": -1400
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 159,
            "polity": {
                "id": 500,
                "name": "ir_elam_6",
                "long_name": "Elam - Igihalkid Period",
                "start_year": -1399,
                "end_year": -1200
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 160,
            "polity": {
                "id": 501,
                "name": "ir_elam_7",
                "long_name": "Elam - Shutrukid Period",
                "start_year": -1199,
                "end_year": -1100
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"Ruins of reservoirs have been discovered along with water intakes, spillways and outlets and even the sewerage systems dating as far back as the Pre-Archaemenid and Assyrian (1500-600 BC) periods.\" §REF§(Mahmoudian and Mahmoudian 2012, 97) Angelakis A N, Mays L W, Koutsoyiannis, D. 2012.Evolution of Water Supply Through the Millennia. IWA Publishing.§REF§ \"Other major administrative achievements of the Elamites included ... the development and management of a gigantic system of underground canals (Qanat) for irrigation\"§REF§(Farazmand 2009, 22) Farazmand, Ali. 2009. Bureaucracy and Administration. CRC Press. Boca Raton.§REF§"
        },
        {
            "id": 161,
            "polity": {
                "id": 503,
                "name": "ir_neo_elam_1",
                "long_name": "Elam I",
                "start_year": -900,
                "end_year": -744
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"Ruins of reservoirs have been discovered along with water intakes, spillways and outlets and even the sewerage systems dating as far back as the Pre-Archaemenid and Assyrian (1500-600 BC) periods.\" §REF§(Mahmoudian and Mahmoudian 2012, 97) Angelakis A N, Mays L W, Koutsoyiannis, D. 2012.Evolution of Water Supply Through the Millennia. IWA Publishing.§REF§"
        },
        {
            "id": 162,
            "polity": {
                "id": 504,
                "name": "ir_neo_elam_2",
                "long_name": "Elam II",
                "start_year": -743,
                "end_year": -647
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"Ruins of reservoirs have been discovered along with water intakes, spillways and outlets and even the sewerage systems dating as far back as the Pre-Archaemenid and Assyrian (1500-600 BC) periods.\" §REF§(Mahmoudian and Mahmoudian 2012, 97) Angelakis A N, Mays L W, Koutsoyiannis, D. 2012.Evolution of Water Supply Through the Millennia. IWA Publishing.§REF§ \"Other major administrative achievements of the Elamites included ... the development and management of a gigantic system of underground canals (Qanat) for irrigation\"§REF§(Farazmand 2009, 22) Farazmand, Ali. 2009. Bureaucracy and Administration. CRC Press. Boca Raton.§REF§"
        },
        {
            "id": 163,
            "polity": {
                "id": 505,
                "name": "ir_neo_elam_3",
                "long_name": "Elam III",
                "start_year": -612,
                "end_year": -539
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 164,
            "polity": {
                "id": 125,
                "name": "ir_parthian_emp_1",
                "long_name": "Parthian Empire I",
                "start_year": -247,
                "end_year": 40
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"From the earliest times, the flow of water was controlled for agricultural purposes by an elaborate system of canals, sluices, dams, embankments, and dikes.\"§REF§(Neusner 2008, 1-2) Neusner, Jacob. 2008. A History of the Jews in Babylonia. 1. The Parthian Period. Wipf &amp; Stock. Eugene.§REF§ \"Iranians were the inventors of qanats ... during the Archaemenid era there appeared an extensive system of underground networks known as qanats\".§REF§(Angelakis, Mays and Koutsoyiannis 2012, 97) Angelakis A N, Mays L W, Koutsoyiannis, D. 2012. Evolution of Water Supply Through the Millennia. IWA Publishing.§REF§ \"sites from the Parthian period together with irrigation canals have been found at Qala-i Sam, Kuh-i Khawaja, Sultan Baba Ziyarat\"§REF§(Raschke 1976, 833) Raschke, Manfred G. in Haase, Wolfgang ed. 1976. Politische Geschichte (Provinzen und Randvölker: Mesopotamien, Armenien, Iran, Südarabien, Rom und der Ferne Osten). Walter de Gruyter.§REF§ \"From the earliest times, the flow of water was controlled for agricultural purposes by an elaborate system of canals, sluices, dams, embankments, and dikes.\"§REF§(Neusner 2008, 1-2) Neusner, Jacob. 2008. A History of the Jews in Babylonia. 1. The Parthian Period. Wipf &amp; Stock. Eugene.§REF§ The use of qanats likely brought irrigation and possibly even drinking water from higher areas. This technology starts to be used in the Iron Age and continues into later periods as it spreads through the Near East and into Central Asia. §REF§(Miksic, John. Personal Communication to Jill Levine, Dan Hoyer, and Peter Turchin. April 2020. Email)§REF§"
        },
        {
            "id": 165,
            "polity": {
                "id": 483,
                "name": "iq_parthian_emp_2",
                "long_name": "Parthian Empire II",
                "start_year": 41,
                "end_year": 226
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"From the earliest times, the flow of water was controlled for agricultural purposes by an elaborate system of canals, sluices, dams, embankments, and dikes.\"§REF§(Neusner 2008, 1-2) Neusner, Jacob. 2008. A History of the Jews in Babylonia. 1. The Parthian Period. Wipf &amp; Stock. Eugene.§REF§ \"Iranians were the inventors of qanats ... during the Archaemenid era there appeared an extensive system of underground networks known as qanats\".§REF§(Angelakis, Mays and Koutsoyiannis 2012, 97) Angelakis A N, Mays L W, Koutsoyiannis, D. 2012. Evolution of Water Supply Through the Millennia. IWA Publishing.§REF§ \"sites from the Parthian period together with irrigation canals have been found at Qala-i Sam, Kuh-i Khawaja, Sultan Baba Ziyarat\"§REF§(Raschke 1976, 833) Raschke, Manfred G. in Haase, Wolfgang ed. 1976. Politische Geschichte (Provinzen und Randvölker: Mesopotamien, Armenien, Iran, Südarabien, Rom und der Ferne Osten). Walter de Gruyter.§REF§ \"From the earliest times, the flow of water was controlled for agricultural purposes by an elaborate system of canals, sluices, dams, embankments, and dikes.\"§REF§(Neusner 2008, 1-2) Neusner, Jacob. 2008. A History of the Jews in Babylonia. 1. The Parthian Period. Wipf &amp; Stock. Eugene.§REF§"
        },
        {
            "id": 166,
            "polity": {
                "id": 485,
                "name": "ir_susiana_pre_ceramic",
                "long_name": "Pre-Ceramic Period",
                "start_year": -7800,
                "end_year": -7200
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "absent",
            "comment": null,
            "description": " \" In this phase, the early settlers of the Susiana plain chose to settle on top of a low natural hill surrounded by shallow marshes at an elevation where dry farming was possible. Even today, when the region is much drier than it was in early Neolithic times, dry agriculture is still practiced as supplement.\" §REF§(Alizadeh 2009, Encyclopedia Iranica Online, <a class=\"external free\" href=\"http://www.iranicaonline.org/articles/coga-bonut-archaeological-site\" rel=\"nofollow\">http://www.iranicaonline.org/articles/coga-bonut-archaeological-site</a>)§REF§"
        },
        {
            "id": 167,
            "polity": {
                "id": 374,
                "name": "ir_safavid_emp",
                "long_name": "Safavid Empire",
                "start_year": 1501,
                "end_year": 1722
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " - a \"double dam\" was built by the ghulam Allah Verdi Khan in the Shiraz area §REF§Sholeh A. Quinn, ‘Iran under Safavid Rule’, in David O. Morgan and Anthony Reid (eds), The New Cambridge History of Islam: Volume 3. The Eastern Islamic World, Eleventh to Eighteenth Centuries (Cambridge: Cambridge University Press, 2010), 227.§REF§ Expanded qanat system started in the Iron Age that brought irrigation and likely drinking water from higher areas. This technology spread through the Near East and into Central Asia, as far as China and some parts of Eurasia. §REF§(Miksic, John. Personal Communication to Jill Levine, Dan Hoyer, and Peter Turchin. April 2020. Email)§REF§"
        },
        {
            "id": 168,
            "polity": {
                "id": 128,
                "name": "ir_sassanid_emp_1",
                "long_name": "Sasanid Empire I",
                "start_year": 205,
                "end_year": 487
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " e.g. Nahravan canal. In later Sassanid period extensive areas brought into cultivation by Khusrau I.§REF§(Chegini 1996, 48) Chegini, N. N. Political History, Economy and Society. in Litvinsky, B. A. ed. and Iskender-Mochiri, I. ed. 1996. History of Civilizations of Central Asia. Volume III. The crossroads of civilizations: A.D. 250 to 750. pp.40-58. unesdoc.unesco.org/images/0010/001046/104612e.pdf§REF§ \"From the earliest times [in Babylonia], the flow of water was controlled for agricultural purposes by an elaborate system of canals, sluices, dams, embankments, and dikes.\"§REF§(Neusner 2008, 1-2) Neusner, Jacob. 2008. A History of the Jews in Babylonia. 1. The Parthian Period. Wipf &amp; Stock. Eugene.§REF§ Irrigation canals.§REF§(Nikitin 1996, 65) Nikitin, A. V. Customs, Arts and Crafts. in Litvinsky, B. A. ed. and Iskender-Mochiri, I. ed. 1996. History of Civilizations of Central Asia. Volume III. The crossroads of civilizations: A.D. 250 to 750. pp.59-80. unesdoc.unesco.org/images/0010/001046/104612e.pdf§REF§ \"Dam construction and qanat or tunnel excavation are among the inventions of Iranians. It is written of Shapur I in the necropolis tabloid that Shapur constructed dams over rivers using funds from his treasury to save farmers from drought. Shapur has said, 'In Susa (modern day Khuzestan) I built so many dams to relieve farmers of a need for water.\"§REF§(Mahmoudian and Mahmoudian 2012, 95) Angelakis A N, Mays L W, Koutsoyiannis, D. 2012.Evolution of Water Supply Through the Millennia. IWA Publishing.§REF§"
        },
        {
            "id": 169,
            "polity": {
                "id": 130,
                "name": "ir_sassanid_emp_2",
                "long_name": "Sasanid Empire II",
                "start_year": 488,
                "end_year": 642
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"From the earliest times [in Babylonia], the flow of water was controlled for agricultural purposes by an elaborate system of canals, sluices, dams, embankments, and dikes.\"§REF§(Neusner 2008, 1-2) Neusner, Jacob. 2008. A History of the Jews in Babylonia. 1. The Parthian Period. Wipf &amp; Stock. Eugene.§REF§ Irrigation canals.§REF§(Nikitin 1996, 65) Nikitin, A. V. Customs, Arts and Crafts. in Litvinsky, B. A. ed. and Iskender-Mochiri, I. ed. 1996. History of Civilizations of Central Asia. Volume III. The crossroads of civilizations: A.D. 250 to 750. pp.59-80. unesdoc.unesco.org/images/0010/001046/104612e.pdf§REF§<br>\"Dam construction and qanat or tunnel excavation are among the inventions of Iranians. It is written of Shapur I in the necropolis tabloid that Shapur constructed dams over rivers using funds from his treasury to save farmers from drought. Shapur has said, 'In Susa (modern day Khuzestan) I built so many dams to relieve farmers of a need for water.\"§REF§(Mahmoudian and Mahmoudian 2012, 95) Angelakis A N, Mays L W, Koutsoyiannis, D. 2012.Evolution of Water Supply Through the Millennia. IWA Publishing.§REF§"
        },
        {
            "id": 170,
            "polity": {
                "id": 108,
                "name": "ir_seleucid_emp",
                "long_name": "Seleucid Empire",
                "start_year": -312,
                "end_year": -63
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"From the earliest times [in Babylonia], the flow of water was controlled for agricultural purposes by an elaborate system of canals, sluices, dams, embankments, and dikes.\"§REF§(Neusner 2008, 1-2) Neusner, Jacob. 2008. A History of the Jews in Babylonia. 1. The Parthian Period. Wipf &amp; Stock. Eugene.§REF§ Irrigation farming formed part of the base of Seleucid economy (along with dry-subsistence farming along the Mediterranean seaboard). Irrigation was used along the Euphrates and Tigris rivers and their tributaries. §REF§Aperghis, G. G. 2004. The Seleukid Royal Economy: The Finances and Financial Administration of the Seleukid Empire. Cambridge: Cambridge University Press. p59§REF§ \"Iranians were the inventors of qanats ... during the Archaemenid era there appeared an extensive system of underground networks known as qanats\" §REF§(Mahmoudian and Mahmoudian 2012, 97) Angelakis A N, Mays L W, Koutsoyiannis, D. 2012. Evolution of Water Supply Through the Millennia. IWA Publishing.§REF§"
        },
        {
            "id": 171,
            "polity": {
                "id": 364,
                "name": "ir_seljuk_sultanate",
                "long_name": "Seljuk Sultanate",
                "start_year": 1037,
                "end_year": 1157
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " Present in Central Asia from about 800 BCE - 1200 CE: \"the major Central Asian hydraulic systems appear to have been maintained with few serious interruptions for over two millenniums, extending down to the Mongol invasion in the thirteenth century.\"§REF§(Starr 2013) Starr, S. Frederick. 2013. Lost Enlightenment: Central Asia's Golden Age from the Arab Conquest to Tamerlane. Princeton University Press. Princeton.§REF§ Nishapur: \"The agricultural basis of the region was the qanat system of irrigation through underground canals.\" §REF§(Peacock 2015) Peacock, A C S. 2015. The Great Seljuk Empire. Edinburgh University Press.§REF§ Merv (for which the cotton industry was \"essential to the town's prosperity\"): \"The city's survival relied on a complex irrigation system, both to bring water of the Murghab River to the city and to allow cultivation of the surrounding oasis. In the tenth century, the only mediaeval period for which we have information, maintenance of the irrigation works required a workforce of 10,000 men.\" §REF§(Peacock 2015) Peacock, A C S. 2015. The Great Seljuk Empire. Edinburgh University Press.§REF§ Merv (for which the cotton industry was \"essential to the town's prosperity\"): \"The city's survival relied on a complex irrigation system, both to bring water of the Murghab River to the city and to allow cultivation of the surrounding oasis. In the tenth century, the only mediaeval period for which we have information, maintenance of the irrigation works required a workforce of 10,000 men.\" §REF§(Peacock 2015) Peacock, A C S. 2015. The Great Seljuk Empire. Edinburgh University Press.§REF§ \"rulers and elites financed dams, canals, and irrigation works\". §REF§(Darling 2013, 95) Darling, Linda T. 2013. A History of Social Justice and Political Power in the Middle East: The Circle of Justice from Mesopotamia to Globalization. Routledge.§REF§"
        },
        {
            "id": 172,
            "polity": {
                "id": 496,
                "name": "ir_elam_2",
                "long_name": "Elam - Shimashki Period",
                "start_year": -2028,
                "end_year": -1940
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"Other major administrative achievements of the Elamites included the development and use of a binary weight system, which had a major influence on the fraction systems of the whole Mesopotamia; a massive number of administrative and business documents; major architectural works; the development and management of a gigantic system of underground canals (Qanat) for irrigation, an Iranian invention that turned the arid land into an agricultural land; the construction and maintenance of numerous public works and enterprises, such as roads, bridges, cities and towns, communication centers, and economic and commercial centers...\" §REF§(Farazmand 2009, 22) Farazmand, Ali. 2009. Bureaucracy and Administration. CRC Press. Boca Raton.§REF§ -- which period?"
        },
        {
            "id": 173,
            "polity": {
                "id": 497,
                "name": "ir_elam_3",
                "long_name": "Elam - Early Sukkalmah",
                "start_year": -1900,
                "end_year": -1701
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"Other major administrative achievements of the Elamites included ... the development and management of a gigantic system of underground canals (Qanat) for irrigation, an Iranian invention that turned the arid land into an agricultural land; the construction and maintenance of numerous public works and enterprises, such as roads, bridges, cities and towns, communication centers, and economic and commercial centers...\" §REF§(Farazmand 2009, 22) Farazmand, Ali. 2009. Bureaucracy and Administration. CRC Press. Boca Raton.§REF§ Kaftari culture, irrigation agriculture practised using water from Kur River and nearby springs.§REF§(Potts 2016, 144) Potts, D T. 2016. The Archaeology of Elam Formation and Transformation of an Ancient Iranian State. 2nd Edition. Cambridge University Press. Cambridge.§REF§"
        },
        {
            "id": 174,
            "polity": {
                "id": 498,
                "name": "ir_elam_4",
                "long_name": "Elam - Late Sukkalmah",
                "start_year": -1700,
                "end_year": -1500
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"Other major administrative achievements of the Elamites included ... the development and management of a gigantic system of underground canals (Qanat) for irrigation\"§REF§(Farazmand 2009, 22) Farazmand, Ali. 2009. Bureaucracy and Administration. CRC Press. Boca Raton.§REF§"
        },
        {
            "id": 175,
            "polity": {
                "id": 492,
                "name": "ir_susa_1",
                "long_name": "Susa I",
                "start_year": -4300,
                "end_year": -3800
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " Hajji Muhammad culture ca. 5800-5100 BCE \"facilitated the irrigated cultivation of grains and cattle farming\"§REF§(Leverani 2014, 49) Liverani, Mario. Tabatabai, Soraia trans. 2014. The Ancient Near East. History, society and economy. Routledge. London.§REF§ \"Although irrigation is implied beginning in the Early Village Period in some regions and possibly only in the Middle Village Period, if at all in others, it is obvious that not all sites are located with primary concern for surface water.\" According to periodization table Early Village period is 6000 BCE, Middle Village Period c4600 BCE.§REF§(Frank 1987, 84 + 17) Frank ed. 1987. The Archaeology of Western Iran. Smithsonian Institution Press. Washington, D.C.§REF§"
        },
        {
            "id": 176,
            "polity": {
                "id": 493,
                "name": "ir_susa_2",
                "long_name": "Susa II",
                "start_year": -3800,
                "end_year": -3100
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"the Sumerian civilisation which flourished before 3500 BC. This was an advanced civilisation building cities and supporting the people with irrigation systems, a legal system, administration, and even a postal service. Writing developed and counting was based on a sexagesimal system, that is to say base 60.\"§REF§J J O'Connor, J J. Robertson, E F. December 2000.  <a class=\"external free\" href=\"http://www-history.mcs.st-andrews.ac.uk/HistTopics/Babylonian_mathematics.html\" rel=\"nofollow\">http://www-history.mcs.st-andrews.ac.uk/HistTopics/Babylonian_mathematics.html</a>§REF§"
        },
        {
            "id": 177,
            "polity": {
                "id": 494,
                "name": "ir_susa_3",
                "long_name": "Susa III",
                "start_year": -3100,
                "end_year": -2675
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " \"the Sumerian civilisation which flourished before 3500 BC. This was an advanced civilisation building cities and supporting the people with irrigation systems, a legal system, administration, and even a postal service. Writing developed and counting was based on a sexagesimal system, that is to say base 60.\"§REF§J J O'Connor, J J. Robertson, E F. December 2000.  <a class=\"external free\" href=\"http://www-history.mcs.st-andrews.ac.uk/HistTopics/Babylonian_mathematics.html\" rel=\"nofollow\">http://www-history.mcs.st-andrews.ac.uk/HistTopics/Babylonian_mathematics.html</a>§REF§"
        },
        {
            "id": 178,
            "polity": {
                "id": 115,
                "name": "is_icelandic_commonwealth",
                "long_name": "Icelandic Commonwealth",
                "start_year": 930,
                "end_year": 1262
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "absent",
            "comment": null,
            "description": " 'The irrigation systems were all private initiatives.' §REF§Árni Daniel Júlíusson and Axel Kristissen 2017, pers. comm. to E. Brandl and D. Mullins§REF§"
        },
        {
            "id": 179,
            "polity": {
                "id": 179,
                "name": "it_latium_ba",
                "long_name": "Latium - Bronze Age",
                "start_year": -1800,
                "end_year": -900
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "absent",
            "comment": null,
            "description": " Possibly unnecessary within Italy at this time due to sufficient rainfall. §REF§(Evans 2013 Evans, J (2013) A Companion to the Archaeology of the Roman Republic, John Wiley &amp; Sons)§REF§"
        },
        {
            "id": 180,
            "polity": {
                "id": 178,
                "name": "it_latium_ca",
                "long_name": "Latium - Copper Age",
                "start_year": -3600,
                "end_year": -1800
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "absent",
            "comment": null,
            "description": " Possibly unnecessary within Italy at this time due to sufficient rainfall. §REF§(Evans 2013 Evans, J (2013) A Companion to the Archaeology of the Roman Republic, John Wiley &amp; Sons)§REF§"
        },
        {
            "id": 181,
            "polity": {
                "id": 180,
                "name": "it_latium_ia",
                "long_name": "Latium - Iron Age",
                "start_year": -1000,
                "end_year": -580
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "unknown",
            "comment": null,
            "description": " Possibly unnecessary within Italy at this time due to sufficient rainfall. §REF§(Evans 2013 Evans, J (2013) A Companion to the Archaeology of the Roman Republic, John Wiley &amp; Sons)§REF§"
        },
        {
            "id": 182,
            "polity": {
                "id": 186,
                "name": "it_ostrogoth_k",
                "long_name": "Ostrogothic Kingdom",
                "start_year": 489,
                "end_year": 554
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": null
        },
        {
            "id": 183,
            "polity": {
                "id": 189,
                "name": "it_st_peter_rep_2",
                "long_name": "Rome - Republic of St Peter II",
                "start_year": 904,
                "end_year": 1198
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " Commercialization of rural hinterland began 1050-1100 CE. \"This was the date of similar signs of agrarian development in eastern Lombardy, too, the hinterlands of Bergamo, Brescia, and Cremona. Here, François Menant points to the late eleventh and twelfth centuries as the moment of take-off for systematic irrigation, the development of vineyards on cleared land, the development of transhumant pastoralism, and, later in the twelfth century in the Cremonese, linen.\" §REF§(Wickham 2015, 107-108) Wickham, C. 2015. Medieval Rome: Stability and Crisis of a City, 900-1150. Oxford University Press. Oxford.§REF§"
        },
        {
            "id": 184,
            "polity": {
                "id": 190,
                "name": "it_papal_state_1",
                "long_name": "Papal States - High Medieval Period",
                "start_year": 1198,
                "end_year": 1309
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " Commercialization of rural hinterland began 1050-1100 CE. \"This was the date of similar signs of agrarian development in eastern Lombardy, too, the hinterlands of Bergamo, Brescia, and Cremona. Here, François Menant points to the late eleventh and twelfth centuries as the moment of take-off for systematic irrigation, the development of vineyards on cleared land, the development of transhumant pastoralism, and, later in the twelfth century in the Cremonese, linen.\" §REF§(Wickham 2015, 107-108) Wickham, C. 2015. Medieval Rome: Stability and Crisis of a City, 900-1150. Oxford University Press. Oxford.§REF§"
        },
        {
            "id": 185,
            "polity": {
                "id": 192,
                "name": "it_papal_state_3",
                "long_name": "Papal States - Early Modern Period I",
                "start_year": 1527,
                "end_year": 1648
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": null
        },
        {
            "id": 186,
            "polity": {
                "id": 193,
                "name": "it_papal_state_4",
                "long_name": "Papal States - Early Modern Period II",
                "start_year": 1648,
                "end_year": 1809
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": null
        },
        {
            "id": 187,
            "polity": {
                "id": 191,
                "name": "it_papal_state_2",
                "long_name": "Papal States - Renaissance Period",
                "start_year": 1378,
                "end_year": 1527
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " Commercialization of rural hinterland began 1050-1100 CE. \"This was the date of similar signs of agrarian development in eastern Lombardy, too, the hinterlands of Bergamo, Brescia, and Cremona. Here, François Menant points to the late eleventh and twelfth centuries as the moment of take-off for systematic irrigation, the development of vineyards on cleared land, the development of transhumant pastoralism, and, later in the twelfth century in the Cremonese, linen.\" §REF§(Wickham 2015, 107-108) Wickham, C. 2015. Medieval Rome: Stability and Crisis of a City, 900-1150. Oxford University Press. Oxford.§REF§"
        },
        {
            "id": 188,
            "polity": {
                "id": 187,
                "name": "it_ravenna_exarchate",
                "long_name": "Exarchate of Ravenna",
                "start_year": 568,
                "end_year": 751
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": null
        },
        {
            "id": 189,
            "polity": {
                "id": 182,
                "name": "it_roman_rep_1",
                "long_name": "Early Roman Republic",
                "start_year": -509,
                "end_year": -264
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "absent",
            "comment": null,
            "description": " Possibly unnecessary within Italy at this time due to sufficient rainfall. §REF§(Evans 2013)§REF§"
        },
        {
            "id": 190,
            "polity": {
                "id": 184,
                "name": "it_roman_rep_3",
                "long_name": "Late Roman Republic",
                "start_year": -133,
                "end_year": -31
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " Possible evidence for irrigation in the Levant. At al-Dbab, Jordan, burial discovered in burned clay trough. §REF§(Kaptijn 2009, 322)§REF§ For irrigation systems, particularly North Africa, read Andrew Wilson."
        },
        {
            "id": 191,
            "polity": {
                "id": 183,
                "name": "it_roman_rep_2",
                "long_name": "Middle Roman Republic",
                "start_year": -264,
                "end_year": -133
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " For irrigation systems, particularly North Africa, read Andrew Wilson."
        },
        {
            "id": 192,
            "polity": {
                "id": 70,
                "name": "it_roman_principate",
                "long_name": "Roman Empire - Principate",
                "start_year": -31,
                "end_year": 284
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " §REF§(Lewis 1974, 26)§REF§ Improved irrigation, Cyrenaica. §REF§(Bunsan, 1991, 57)§REF§ For irrigation system, particularly North Africa, see Andrew Wilson. For Egypt irrigation: Rathbone 2008; Blouin 2012"
        },
        {
            "id": 193,
            "polity": {
                "id": 181,
                "name": "it_roman_k",
                "long_name": "Roman Kingdom",
                "start_year": -716,
                "end_year": -509
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "absent",
            "comment": null,
            "description": " Possibly unnecessary within Italy at this time due to sufficient rainfall. §REF§(Evans 2013 Evans, J (2013) A Companion to the Archaeology of the Roman Republic, John Wiley &amp; Sons)§REF§"
        },
        {
            "id": 194,
            "polity": {
                "id": 188,
                "name": "it_st_peter_rep_1",
                "long_name": "Republic of St Peter I",
                "start_year": 752,
                "end_year": 904
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " Paulinius' ? aqueduct also irrigated crops. §REF§(Squatriti 2002, 14)§REF§"
        },
        {
            "id": 195,
            "polity": {
                "id": 544,
                "name": "it_venetian_rep_3",
                "long_name": "Republic of Venice III",
                "start_year": 1204,
                "end_year": 1563
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " 1509-1630 CE: \"Grain needs and profit opportunities driven by demographic increase - the price revolution - stimulated extension of the acreage tilled through drainage of marshy areas and cultivation of marginal land, much more than higher productivity via better agronomic practice - irrigation, water-meadows and fodder crops, high-yielding rice fields, stock-raising to balance agriculture etc.\"§REF§(Knapton 2014, 102) Michael Knapton. The Terraferma State.  Eric Dursteler. ed. 2014. A Companion to Venetian History, 1400-1797. BRILL. Leiden.§REF§ 1509-1630 CE: \"Action concerning watercourses and marshes brought diversion of rivers to avoid silting up the Venetian lagoon, attempts to prevent them flooding, authorization and support for sometimes massive land drainage schemes, and concession of irrigation rights. Policy toward woodland aimed to reserve much timber for state arsenal use and to counter deforestation.\"§REF§(Knapton 2014, 101) Michael Knapton. The Terraferma State. Eric Dursteler. ed. 2014. A Companion to Venetian History, 1400-1797. BRILL. Leiden.§REF§"
        },
        {
            "id": 196,
            "polity": {
                "id": 545,
                "name": "it_venetian_rep_4",
                "long_name": "Republic of Venice IV",
                "start_year": 1564,
                "end_year": 1797
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " 1509-1630 CE: \"Grain needs and profit opportunities driven by demographic increase - the price revolution - stimulated extension of the acreage tilled through drainage of marshy areas and cultivation of marginal land, much more than higher productivity via better agronomic practice - irrigation, water-meadows and fodder crops, high-yielding rice fields, stock-raising to balance agriculture etc.\"§REF§(Knapton 2014, 102) Michael Knapton. The Terraferma State.  Eric Dursteler. ed. 2014. A Companion to Venetian History, 1400-1797. BRILL. Leiden.§REF§ 1509-1630 CE: \"Action concerning watercourses and marshes brought diversion of rivers to avoid silting up the Venetian lagoon, attempts to prevent them flooding, authorization and support for sometimes massive land drainage schemes, and concession of irrigation rights. Policy toward woodland aimed to reserve much timber for state arsenal use and to counter deforestation.\"§REF§(Knapton 2014, 101) Michael Knapton. The Terraferma State. Eric Dursteler. ed. 2014. A Companion to Venetian History, 1400-1797. BRILL. Leiden.§REF§"
        },
        {
            "id": 197,
            "polity": {
                "id": 149,
                "name": "jp_ashikaga",
                "long_name": "Ashikaga Shogunate",
                "start_year": 1336,
                "end_year": 1467
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " 'During the early medieval period, the shoen proprietor (or his administrator) normally coordinated present corvee and constructed and maintained irrigation facilities, built reservoirs, dammed rivers or streams, and constructed ditches or canals. Peasants using the water were required to pay the proprietor an iryo or water charge on the theory that \"every drop of water belonged to the proprietor\". by the late medieval period, such was not the case. The construction and maintenance of reservoirs and irrigation ditches was undertaken collectively by peasants either from a single village community of from several village communities banded together as a unit for the task.'§REF§Hall, John Whitney, and Takeshi Toyoda, (eds.) 1977. Japan in the Muromachi age. University  of California Press.p.113§REF§"
        },
        {
            "id": 198,
            "polity": {
                "id": 146,
                "name": "jp_asuka",
                "long_name": "Asuka",
                "start_year": 538,
                "end_year": 710
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": "§REF§Brown, D., 1993.The Cambridge History of Japan, vol. 2.Cambridge: Cambridge University Press, 160.§REF§"
        },
        {
            "id": 199,
            "polity": {
                "id": 151,
                "name": "jp_azuchi_momoyama",
                "long_name": "Japan - Azuchi-Momoyama",
                "start_year": 1568,
                "end_year": 1603
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " ‘by the late medieval period... The construction and maintenance of reservoirs and irrigation ditches was undertaken collectively by peasants either from a single village community of from several village communities banded together as a unit for the task.'§REF§Hall, John Whitney, and Takeshi Toyoda, (eds.) 1977. Japan in the Muromachi age. University  of California Press.p.113§REF§"
        },
        {
            "id": 200,
            "polity": {
                "id": 147,
                "name": "jp_heian",
                "long_name": "Heian",
                "start_year": 794,
                "end_year": 1185
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Irrigation_system",
            "irrigation_system": "present",
            "comment": null,
            "description": " '\"miscellaneous rice\" (zoff), for the upkeep of official buildings, religious institutions, and irrigation facilities...'§REF§Shively, Donald H.  and  McCullough, William H.  2008. The Cambridge History of Japan Volume 2: Heian Japan. Cambridge Histories Online © Cambridge University Press.p.314§REF§"
        }
    ]
}