【摘要】 灌区灌溉设计中 ,常用降雨量进行频率分析来选取灌溉设计保证率及其对应典型年。这种方法存在一定缺陷。针对这种情况 ,推荐使用对灌区作物净灌溉需水量 (或称缺水量 )进行频率分析。它可以充分考虑到降雨时空分布的影响 ,更具合理性更多还原

【Abstract】 Rainfall frequency analysis is used commonly to determine probability of irrigation water requirement, and to choose typical years for irrigation project design. But there are some disadvantages in this method. To overcome these disadvantages, the results of frequency analysis of net irrigation requirement are recommended to determine the probability in this paper. A case study shows that the new method is more valid in considering rainfall distribution.更多还原