Through researching the general laws of run_off formation, deducing the design formula of drainage discharge and analyzing e ach parameter of the formula, the reasonable calculation method for parameters i n the drainage design formula, is presented.

• 通过研究地表径流的形成规律，对排水流量设计公式的推导和计算公式中各参数意义的分析，提出滑坡排水设计计算公式中各参数的合理计算方法.