Situational and sustainability assessment of irrigation systems to Nepal from the Koshi Barrage

IF 1.6 Q3 WATER RESOURCES Water Practice and Technology Pub Date : 2023-10-20 DOI:10.2166/wpt.2023.171
Dipesh Singh, Prakash Gaudel, Dharma Raj Bagale
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Abstract

Abstract The Koshi Barrage was constructed in the Nepalese territory as per the Kosi Agreement signed between Nepal and India in 1954 and amended in 1966. Two irrigation systems, viz. the Koshi Distributary System and the Koshi Pump Lift Irrigation System, starting off from the Koshi Western Main Canal in India, are irrigating 11,300 and 13,180 ha of land in the Saptari District of Nepal, respectively. The average annual amount of water available in the Koshi Pump System and Koshi Distributary System is found to be 60.28 and 136.97 million cubic meters (MCM), respectively. The existing cropping intensity of these two systems is 170 and 190%, respectively. The sustainability of these irrigation systems was assessed using the Multi Criteria Analysis (MCA). The Koshi Pump Irrigation System is found to be a Sustained but At-Risk Project, whereas the Koshi Distributary Irrigation System is found to be a Not Sustained Project. Furthermore, the study concluded that these irrigation systems have low crop productivity and the conditions of the existing infrastructures are poor.
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科希拦河坝对尼泊尔灌溉系统的情况和可持续性评估
根据尼泊尔与印度于1954年签署并于1966年修订的《戈西协定》,在尼泊尔境内修建了戈西拦河坝。两个灌溉系统,即Koshi分流系统和Koshi水泵提升灌溉系统,从印度的Koshi西部主运河开始,分别灌溉尼泊尔Saptari地区的11,300和13,180公顷土地。Koshi水泵系统和Koshi分流系统的年平均可用水量分别为6028和13697万立方米(MCM)。两种制度的现有种植强度分别为170%和190%。使用多标准分析(MCA)对这些灌溉系统的可持续性进行了评估。Koshi水泵灌溉系统被认为是一个持续但有风险的项目,而Koshi分流灌溉系统被认为是一个不可持续的项目。此外,该研究得出结论,这些灌溉系统的作物生产力较低,现有基础设施的条件也很差。
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来源期刊
CiteScore
2.30
自引率
6.20%
发文量
136
审稿时长
14 weeks
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