LIJing-ran,ZHOUYi,LIZhe,et al.Effect of Pipeline Siltation on Drainage Capacity Based on SWMM Simulation[J].China Water & Wastewater,2022,38(No.3):118-125.
Effect of Pipeline Siltation on Drainage Capacity Based on SWMM Simulation
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
No.第3
Page:
118-125
Column:
Date of publication:
2022-02-01
- Keywords:
- pipeline siltation; drainage capacity; siltation degree; SWMM
- Abstract:
- Siltation caused by sediments in the drainage pipeline not only affects its drainage capacity, but also has a complex effect on the drainage capacity of the whole pipe network system. Under the condition of different siltation degree of pipeline, the relative discharge capacity and the relative total overload time were selected as the indexes to measure the attenuation of drainage capacity, and the consequences of variations in drainage capacity were simulated by SWMM. According to the decreasing trend of drainage capacity, the whole process was divided into three stages: slow growth, accelerated growth (critical desilting period) and explosive growth (recovery period of desilting). Different pipeline maintenance and desilting strategies were adopted in each stage, and the key desilting objects were determined by the simulation results of pipes with different diameters. When the method was applied to a residential district in Wuhan, the siltation degree of 46% and 66% could be used as the dividing line of the three stages, and better results could be achieved by focusing on desilting pipelines with diameter larger than 800 mm.
Last Update:
2022-02-01