The square ratio method and basin precipitation method are commended for annual runoff calculation. 在年径流计算中，建议采用面积比法和流域雨量法。
The relationship between the scale and the wavelength is given, and a natural annal flow time series in the upper reach of the Yellow River is analyzed. 文中给出基于尺度能量参数的子波变换中尺度与波长的关系，并且分析了一组黄河上游年径流量数据。
