Rainfall frequency and amount are thus crucial factors in determining the position of deposition in a soil profile.

降雨次数和降雨量是左右溶质在土壤剖面中沉积位置高低的决定性因素。

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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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And the frequency grade and rainfall of rainstorm have a positive correlation.

暴雨频次、等级、雨量的基本特征具有正相关关系；

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The same would be true of rainfall, hurricane frequency and so on.

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