降雨是所有水文过程的动力,这是最重要的输入任何径流计算和建模过程. 然而,由于平时缺少降水的时空变化的数据代表的自然降水过程,降水输入通常是气象组织的弱点,1982；niemczynowicz、1991.
the rainfall is a driving force of all hydrological processes and it constitutes the most important input to any runoff calculations and modeling procedures. however, because of the usual lack of rainfall data representative for temporal and spatial variations of the natural rainfall process, the rainfall input is often a weak point wmo, 1982 ; niemczynowicz, 1991.
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