面平均雨量是流域水情预报和水资源分析的重要因子。为此,以贝江流域为例,介绍子流域面积权重计算面平均雨量的方法-Donghai waterway is the river course connecting Xijiang river to Beijiang river. The flow distribution ratio be2 tween Xijiang river and Donghai waterway is the key factor directly influence th