SONG Rui-ning,DAI Zheng-hui,WANG Yu,et al.Influence of Pipe Network Defects on Simulation Results of Urban Drainage System[J].China Water & Wastewater,2021,37(11 11):125-130.
Influence of Pipe Network Defects on Simulation Results of Urban Drainage System
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
11 11
Page:
125-130
Column:
Date of publication:
2021-06-01
- Keywords:
- pipe network; closed-circuit television detection; structural defect; functional defect; InfoWorks ICM model
- Abstract:
- As a core part of the drainage system, drainage pipe network has many defects and problems due to the lack of insufficient attention for a long time. Closed-circuit television (CCTV) detection technology can quickly and intuitively locate the internal defects of pipelines, provide accurate basic images, quickly reflect the running state of drainage pipe network, and provide a basis for pipeline repair, maintenance and transformation. Based on model expression method corresponding to the pipe network defects, influence of pipe network defects on urban drainage system was simulated and analyzed by using urban integrated catchment management model (InfoWorks ICM). Affected by the defects such as deposition and corrosion, the pipelines with drainage capacity not meeting 1-year return period increased by 7.4%, while those with drainage capacity meeting 3-year return period decreased by 2.8%. Under the condition of 2-hour design rainfall with 3-year return period, the waterlogging area increased by 13.8% compared with that without defects in the pipe network. Therefore, the impact of pipe network defects on urban drainage system should be fully considered in model construction, so as to provide a basis for determining the priority level of pipe network repair and reconstruction.
Last Update:
2021-06-01