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The impact of water-pricing policies on water productivity: Evidence of agriculture sector in Iran
Agricultural Water Management ( IF 6.7 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.agwat.2020.106548
Omid Zamani , Hossein Azadi , Seyed Abolghasem Mortazavi , Hamid Balali , Saghi Movahhed Moghaddam , Lubos Jurik

Abstract Water pricing and reducing the costs of the implementation and maintenance of irrigation systems have been a challenging topic for a long time. Water pricing issues combine two complex dimensions. The first dimension is the economy of the farm and its association with the broader economic system and farming practices. The second dimension is the hydrology and interconnection of the plot with the irrigation system, the river basin, and the underlying water policy framework. Accordingly, this study aimed to investigate how the institutionalization of water applied would affect water productivity through the implementation of a water-pricing policy. To this end, this study formulated a Positive Mathematical Programming (PMP) model with a gross margin maximizing objective function to assess the data collected from 213 farms in Hamadan-Bahar Plain, Iran. The results revealed that a water-pricing policy can change the cropping pattern and also irrigation system within the limitations of the case study. It can also be a driver to motivate farmers to use a modern and more efficient irrigation system. The potential environmental benefits from the improved on-farm irrigation efficiency depend on the government's ability to prevent the extension of the irrigated area. In absence of such controls, the aquifer depletion will be accelerated. Therefore, an appropriate water-pricing policy could improve water productivity and also reduce water applied.

中文翻译:

水定价政策对水生产力的影响:伊朗农业部门的证据

摘要 长期以来,水定价和降低灌溉系统实施和维护成本一直是一个具有挑战性的课题。水价问题结合了两个复杂的维度。第一个维度是农场经济及其与更广泛的经济体系和农业实践的关联。第二个维度是地块与灌溉系统、流域和潜在水政策框架的水文和相互联系。因此,本研究旨在通过实施水定价政策来调查应用水的制度化如何影响水生产力。为此,本研究制定了一个具有毛利率最大化目标函数的正数学规划 (PMP) 模型,以评估从伊朗哈马丹-巴哈尔平原的 213 个农场收集的数据。结果表明,在案例研究的范围内,水价政策可以改变种植模式和灌溉系统。它也可以成为激励农民使用现代和更高效灌溉系统的驱动力。提高农田灌溉效率的潜在环境效益取决于政府防止灌溉面积扩大的能力。如果没有这样的控制,含水层的枯竭将加速。因此,适当的水价政策可以提高水资源生产率并减少用水量。结果表明,在案例研究的范围内,水价政策可以改变种植模式和灌溉系统。它也可以成为激励农民使用现代和更高效灌溉系统的驱动力。提高农田灌溉效率的潜在环境效益取决于政府防止灌溉面积扩大的能力。如果没有这样的控制,含水层的枯竭将加速。因此,适当的水价政策可以提高水资源生产率并减少用水量。结果表明,在案例研究的范围内,水价政策可以改变种植模式和灌溉系统。它也可以成为激励农民使用现代和更高效灌溉系统的驱动力。提高农田灌溉效率的潜在环境效益取决于政府防止灌溉面积扩大的能力。如果没有这样的控制,含水层的枯竭将加速。因此,适当的水价政策可以提高水资源生产率并减少用水量。提高农田灌溉效率的潜在环境效益取决于政府防止灌溉面积扩大的能力。如果没有这样的控制,含水层的枯竭将加速。因此,适当的水价政策可以提高水资源生产率并减少用水量。提高农田灌溉效率的潜在环境效益取决于政府防止灌溉面积扩大的能力。如果没有这样的控制,含水层的枯竭将加速。因此,适当的水价政策可以提高水资源生产率并减少用水量。
更新日期:2021-02-01
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