城市非恒定无压雨水管流流量演算方法分析

Analyses of the urban unsteady and non-pressure rain pipe flow routing method

分析了马斯京根法、瞬时单位线法、水动力学方法(动力波、扩散波和运动波演算模型),并将其应用城市非恒定无压雨水管流流量演算;通过雨水管道室内实验和演算方法对比得出:马斯京根法计算更加简单,可在资料条件不好,精度要求较高时,用于城市雨水管道的流量演算;瞬时单位线法对于城市雨水管道的演算具有不稳定性,在资料条件不好,精度要求一般时,可用于雨水管道的实际流量演;动力波计算精度较高,可适应于各种管道坡度和入流条件.在资料条件好,精度要求高时,可用于城市雨水管道的流量演算;扩散波与运动波计算比动力波简单,在资料条件好,精度要求一般的情况下,可用于城市雨水管道的实际模拟计算.

The muskingum method,instantaneous unit hydrograph method,and the water dynamics wave,diffusion wave and kinematic wave routing model) were analyzed,and their application discussed,that of the Urban unsteady and non-pressure rain pipe flow routing.The results were drawn out through the indoor rain pipe experiment compare and routing method analyses: Muskingum method is more simple,and it can be used to the urban stormwater pipe flow routing in poor data conditions and higher accuracy requirements.The instantaneous unit hydrograph method was unstable in urban rainwater pipes calculus,and it can be used to the urban stormwater pipe flow routing in poor data conditions and higher accuracy requirements in poor information and the accuracy requirements.The dynamic wave method was high precision,and it can be adapted to the urban stormwater pipe flow routing in the various pipe slope and inflow and the good data conditions and the high precision requirements.The diffusion wave and kinematic wave was more simple than the dynamic wave method,and it can be adapted to the urban stormwater pipe flow routing in the simple conditions and in the normal good data and precision requirements.