ZHOULing,LUYan-qing.SWMM Simulation Capability for Transient Flow in Drainage Pipe[J].China Water & Wastewater,2022,38(5):108-115.
SWMM Simulation Capability for Transient Flow in Drainage Pipe
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第5期
Page:
108-115
Column:
Date of publication:
2022-03-01
- Keywords:
- storm water management model (SWMM); drainage pipe; transient flow; Preissmann slot method
- Abstract:
- Storm water management model (SWMM) plays an important role in urban stormwater management. However, its capability to simulate transient flow in drainage pipes is seldom investigated. The simulation capability of SWMM in drainage pipes with pressurized hydraulic transient was analyzed and improved by taking the classic method of characteristics as a reference. The original SWMM had poor capability to simulate rapid pressurized transient flow in drainage pipes. Therefore, the modified method of setting virtual nodes and modifying the width of the Preissmann slot was introduced, which could effectively improve the numerical accuracy of SWMM for transient flow simulation. Moreover, the effects of key parameters such as space step, wave velocity, ratio of pipe length and diameter, CFL rules, convergence accuracy and minimum node surface area on simulation accuracy, stability and calculation efficiency were further analyzed, and the recommended value ranges were proposed.
Last Update:
2022-03-01