SWMM产汇流模型参数的设计条件等价优化

Optimization of equivalent design conditions for SWMM rain-off model parameters

为解决模型技术应用于校核雨水管网设计方案时的设计条件等价化问题,提出基于暴雨洪水管理模型(storm water management model,SWMM)的产汇流参数等价处理方法.该方法从推理公式法的基本原理出发,以其流量过程线假设为基础,通过模型模拟恒定设计降雨,以模拟汇水区出流流量过程线是否与推理公式法假设流量过程线特征相吻合为判断等价的依据,通过实例验证了提出的设计条件等价原理实施的可行性;同时,为了解决人工调试参数的繁复性,提出采用改进的粒子群优化算法(PSO)自动实现参数的优化调整过程.

A SWMM （Storm water management model ）-based method for the adjustment of rain-off model parameters is proposed to realize the equivalent design conditions in pipe network design calibration with hydraulic model. The method proceeds from the basic principle of Rational Method, and takes the assumption of runoff curves with time as the basis. By simulating the runoff catchment through constant rainfall pattern, the principle of equivalent can be judged by whether the features of the simulated runoff curves matched those of the assumption with Rational Method. Case study has verified the feasibility of the proposed method. Meanwhile, to simplify the manual operation in parameters adjustment, an improved particle swarm optimization （PSO） has been put forward to complete the process automatically.