复杂河网的水力计算,在糙率参数的率定时,通常采用手工调试的方法,工作量巨大且带有较大的任意性.本文根据糙率的物理意义,从反问题的角度,将河网参数问题提为参数反问题,并用复合形法求解. 将该方法运用于江苏南通河网,能节省工作量,有效地克服了手工调试的缺陷. The hydraulic calculation of complex river network usually adopts the method of manual debugging when the rate of roughness parameter is fixed, so the workload is huge and has a great arbitrariness.In this paper, according to the physical meaning of roughness, from the point of view of inverse problem, The parameter of the network is referred to as the inverse problem of the parameter, and is solved by the complex method. This method is applied to the Nantong river network in Jiangsu Province, which can save the workload and effectively overcome the defects of manual debugging.