An Examination of Efficient Operation of Irrigation System for Effective Water Use

由于近几十年来水需求不断增加，日本需要稳定的农业用水供应和确保灌溉用水的方法。但是，由于环境问题和建设成本的不断上升，很难增加大坝等水源水库。为了解决这些问题，在渠首工程与大坝之间的灌溉系统中设置了中储式水库。中储水库是一个临时蓄水的池塘。特别是，近年来在日本，已经研究了这种水库的运行，以利用由降雨产生的多余的水。例如，如果发生降雨，指挥区的需水量减少小于大坝泄水。这些多余的水可以储存在中间水库中。当指挥区需水量再次增加时，中储水库蓄水，可在大坝泄洪前使用。在许多灌溉 关于我们 在日本的一些地区，水的需求是由支流来水和大坝放水来满足的。在这种情况下，可以通过降雨增加支流入流来节省大坝泄流。但是，由于降雨造成的河道流量增加，超过了指挥区的用水需求，灌溉设施又无法取水，只能无效地向下游排放。在这项研究中，我们建议建立一个中间存储水库，存储多余的水没有采取的头部工程。此外，我们提出了两个操作，以有效地利用储存在中间水库的水。一种是大坝与中储水库的单独调度，另一种是大坝与中储水库的联合调度。当大坝与中储水库单独运行时，大坝泄流调度与中储水库调度相互独立。当两者联动时，大坝泄流调度与中储水库调度控制。并通过仿真验证了所提方法的有效性。少

Since water demands have been increasing during the recent decades, stable supply of agricultural water and means of securing water for irrigation are needed in Japan. But, due to environmental problems and escalating construction cost, it is difficult to increase the source reservoir such as dam. To solve these problems, the mid-storage reservoir has been installed in irrigation system between the head works and the dam. The mid-storage reservoir is a king of pond, which is set up for storing the excess water temporarily. Especially, in Japan of recent years, the operation of such a reservoir has been researched for using the excess water generated by rainfall. For instance, if rainfall occurs, the water demand in command area decreases less than the dam release. And such excess water can be stored in the mid-storage reservoir. The water demand increase again in the command area, then the water stored in the mid-storage reservoir, can be used prior to the dam release. In many irrigati … More on districts of Japan, the water demand is supplied by tributary inflow as well as dam release. In such cases, the dam release can be saved by the increase of tributary inflow due to rainfall. However, the increased river flow caused by rainfall, which exceeds the water demand of command area and cannot be intaken by irrigation facility, is invalidly discharged downstreams. In this study, we propose the establishment of a mid-storage reservoir that stores the excess water not taken by head works. Also, we propose two operations for effective use of water stored in mid-storage reservoir. One is the individual operation of dam and mid-storage reservoir and the other is the linked. In case of the individual operation of dam and mid-storage reservoir, the operation of dam release become independent of the operation of mid-storage reservoir. In case of the linked, the operation of dam release is controlled with the operation of mid-storage reservoir. And, the effect of the proposed methods are examined by the simulation. Less