Night Irrigation Reduction for Water Saving in Medium-Sized Systems
Night Irrigation Reduction for Water Saving in Medium-Sized Systems
复制标题
减少夜间灌溉以节省中型系统的节水
DOI：
10.1061/(asce)0733-9437(2003)129:2(108
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
J. Feyen
中科院分区：
文献类型：
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作者：
B. Bièvre;A. Alvarado;L. Timbe;R. Célleri;J. Feyen
在许多中型灌溉系统中，由于需求低且供应没有相应减少，水在夜间被浪费。使用 MIKE 11 作为软件工具，应用水动力模型来模拟突然的流量变化及其沿小型灌溉渠的传播时间。还分析了根管的填充和排空。该模型使用现场实验数据进行校准，其中包括启动、正浪涌和负浪涌。考虑到运河中大量的水流失，开发了一种技术。莫尔登和盖茨于 1990 年提出的绩效指标效率、充分性、公平性和可靠性，使用有效排放的概念进行了重新定义。因此，新定义的指标被用来寻找最能满足日夜排放目标的闸门运行场景。发现实行夜送减量是可行的。校准模型用于制定每日流量变化的运河运营指南，从而在夜间节省大量水。
In many medium-sized irrigation systems water is wasted during the night because demand is low and supply is not reduced accordingly. A hydrodynamic model was applied, using MIKE 11 as a software tool, to simulate abrupt discharge changes and their travel times along small irrigation canals. Filling and emptying of the canal were also analyzed. The model was calibrated with data of a field experiment that included startup, positive, and negative surges. A technique was developed to take into account the considerable water losses in the canal. Performance indicators efficiency, adequacy, equity, and dependability, proposed by Molden and Gates in 1990, were redefined using the concept of usefully delivered discharge. The newly defined indicators were consequently used to find the gate operation scenario that meets optimally the target day and night discharges. It was found that it is feasible to implement night delivery reduction. The calibrated model was used to develop guidelines for the operation of the canal with daily flow variation, resulting in considerable water savings during the night.