Rainfall frequency analysis is used commonly to determine probability of irrigation water requirement, and to choose typical years for irrigation project design.
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。
Rainfall frequency analysis is used commonly to determine probability of irrigation water requirement, and to choose typical years for irrigation project design.
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。
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