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四、关于径流过程预报这几年来开展的暴雨径流过程预报中,单位线法是一个应用得最普遍的方法。在若干流域应用单位线作径流过程的预报获得了好的成果;但是在更多的流域发现由各次洪水分析出来的单位线,由于暴雨特征(如暴雨中心位置、暴雨分布、暴雨强度等)及径流深度不同而形态各异,因而采用了各种暴雨特征因素对单位线的三个要素作了一些校正。这是可以的,而且在一定程度上经验性地解决了当前预报中的提高精度问题,今后还是可以这样做的。但是,为什么会有各种型式的单位线呢?这就是说,流域的汇流曲线在各
Fourth, on the runoff forecast In recent years to carry out storm runoff forecast, unit line method is a most commonly used method. Good results have been obtained from forecasting runoff using unit lines in several watersheds; however, unit lines analyzed by floods are found in more watersheds. Due to characteristics of stormstorms (eg, location of storm centers, distribution of stormstorms, intensity of storm events, etc.) And runoff depth of different shapes and different, thus using a variety of heavy rain characteristics of the three elements of the unit line made some corrections. This is possible, and to a certain extent, the problem of improving accuracy in the current forecast can be solved empirically and can be done in the future. However, why there are various types of unit line it? That is to say, the confluence of the river basin in each