Non－uniformity of Spatial Distribution of Rainfall on the Loess Plateau

根据黄土高原13条流域的降雨资料，分三种雨型即局地强对流条件引起的小范围、短历时、高强度的局地性暴雨（A型暴雨），峰面型降雨夹有局地雷暴性质的较大范围、中历时、中强度暴雨（B型暴雨），峰面型降雨引起的大面积、长历时、低强度暴雨（C型暴雨）；选用流域面雨量离差系数Cv、流域降雨不均匀系数η和流域最大点与最小点降雨量比值系数α三种指标，分析了次降雨空间分布的不均匀性。：Based on the 448 single rainfall data of 13 watersheds on the Loess Plateau，the non－uniformity of spatial distribution of rainfall，including individual rainfall amount，individual rainfall intensity，and randomness of rain－storm center are analyzed，by dividing rainfall into three patterns and adapting three indexes． The three indexes are the deviation coefficient of area rainfall Cv，the non－uniformity coefficient of rainfall （η），and the ratio between maximum and minimum rainfall （α）． The result indicated t..