缺乏实测径流资料时设计年径流量的分析计算

在缺乏实测径流资料的地区，设计年径流量分析计算主通过参数等值线法和水文比拟法来推求。参数等值线法利用参数等值线图进行地理插值，获得统计参数，进而求得不同频率下的设计径流值；水文比拟法是与参证站影响径流的各项因素相似为前提下，将参证站的水文资料移置到设计流域上来，从而求得设计径流量。以常王项目区红网河支流石子河设计径流分析计算作为典型例子，通过直接法、降雨量修正法和水文比拟法3种方法，计算得出不同保证率下设计径流量，并分析成果的合理性。

Analysis and Calculation of Design Annual Runoff under No Measured Data

Areas the lack of measured runoff data, design runoff is calculated by parameters isoline method and hydrologic analogy. Parameters isoline method is used parameters isoline graph to geography interpolation, obtained the statistical parameters, and thus obtained different frequency design runoff values; hydrologic analogy is relocated participation certificates station hydrological data to design basin, obtained design runoff. This paper use Shizi river design runoff calculated as a typical example, through direct method, rainfall modified method and hydrologic analogy to calculate the runoff, and analysis results reasonable.