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首页> 外文会议>U.S.Committee on Irrigation and Drainage Water Mangement Conference >IRRIGATION EFFICIENCY AND WATER USERS' PERFORMANCE IN WATER MANAGEMENT: A CASE STUDY ON THE HERAN DISTRIBUTARY SANGHAR, SINDH, PAKISTAN
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IRRIGATION EFFICIENCY AND WATER USERS' PERFORMANCE IN WATER MANAGEMENT: A CASE STUDY ON THE HERAN DISTRIBUTARY SANGHAR, SINDH, PAKISTAN

机译：灌溉效率和水用户在水管理中的表现 - 以江江苏丹，信徒，巴基斯坦为例

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摘要

This study focuses on water use efficiency and water user's role in maintenance of the system for sustainable irrigated agriculture. The parameters assessed were water delivery to water users, water distribution, water use efficiency and farmers' role. The relevant data were collected in the field and through a literature survey. Analyses of data indicate that DPR during the season varied from 1.0 to 1.60. The middle reach received slightly more than the head reach, and in the tail reach it varied from 0.6 to 1.80. Furthermore, water distribution among watercourses was also variable. The 7L- head watercourse received 30 to 82 percent more water than its design discharge (Qd). The downstream watercourses (16R and 18AT) also received up to 183 percentmore discharge than Qd. However, the mid-reach watercourses (9AR and 13R) received the design share or less, though the flow of water was greater. In spite of unfair distribution there were no complaints from the water users about unequal distribution because there was enough water for everyone. Furthermore, result indicated that total water supply was 6.62 mm/day and the crop water requirement was between 2.54 and 3.56 mm/day in the Rabi (winter) crop season. Thus, the total loss of water was estimated as 46 percent. This was also verified by estimating seepage losses in watercourses and the distributary, which were 4.5 percent and 26 percent, respectively. However, the role of the Water Users Associations (WUA) in the maintenance of the distributarywas significant. They collectively desilted the channel at a cost of about US$ 0.25 (Pak Rs. 21) per acre of land, which improved the head-tail water delivery performance ratio from 3.53 to 2.55 (Lashari and Murray-Rust 2002). But the maturity index hasindicated that only 12.5 percent of the WUAs were at a sustainable level (Lashari et al. 2009).
机译：本研究侧重于水利用效率和水用户在维护可持续灌溉农业系统方面的作用。评估的参数为水供水，水分配，水利用效率和农民作用。相关数据在现场收集，并通过文献调查。数据分析表明，季节的DPR在1.0到1.60之间变化。中间达到比头部到达略高，并且在尾部达到它的变化从0.6到1.80。此外，水道中的水分布也是可变的。 7L-Head WaterCourse比其设计放电（QD）更多地收到30至82％。下游水道（16R和18AT）也收到高达183个百分点的放电比QD。然而，中途达到的水道（9AR和13R）收到了设计份额或更少，尽管水流越大。尽管有不公平的分配，但水用户没有对不平等的分配的投诉，因为每个人都有足够的水。此外，结果表明，总供水为6.62毫米/天，作物水需求在拉比（冬季）作物季节的2.54和3.56毫米/天。因此，水的总损失估计为46％。还通过估计水道中的渗流损失和分配器分别为4.5％和26％来验证这一点。但是，水用户关联（WuA）在维护分发中的作用显着。他们将渠道集中在每英亩大约0.25美元（PAK卢比21）的费用中叠加，这改善了3.53至2.55（Lashari和Murray-Rust 2002）的头尾水输送性能比。但是，到期指数已成为仅12.5％的武士均处于可持续水平（Lashari等，2009）。

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