考虑灌溉用水集中度下田间水池调节容积分析

Calculating the Volume of Regulating Field Water Pool under Intensive Irrigation at Specific Time Periods

目前灌溉田间水池的设计按照轮灌制度进行,但实际灌溉中普遍存在农户集中用水现象。针对该矛盾,通过理论推求,给出了上午和下午2个梯形高峰集中用水过程下调节容积的计算方法,对比分析了完全轮灌和考虑集中用水情况下的田间水池调节容积大小。结果表明,考虑集中用水情况下所需的田间水池调节容积大于完全轮灌情况,应用示例中,和完全轮灌相比,典型梯形用水过程下水池调节容积增加了14.82%。在灌溉系统水池调节容量设计时应充分考虑随机用水情况,以保障正常灌溉作业。

Current design of regulating-water pool in the field assumed the irrigation is rotational, while m reality- farmers often use the water during some specific time periods. In order to resolve this dilemma between design and use, this paper presented a new method to calculate how to adjust the pool volume assuming the daily change of intensive water use with time was two trapezoidal shapes, one in the morning and one in the aftemoon. We compared the pool sizes calculated considering both normal rotational irrigation and intensive irrigations at specif- ic times. The results showed that the pool volume for intensive irrigation was larger than that for rotational irriga- tion, and for a typical trapezoidal shape of water-use process, the pool volume needed to be enlarged by 14.82%. Hence, in designing the water pool, its volume should be calculated based on the real demand for irrigation to ensure safe and reliable operation of the irrigation system.