HUANGPeng-lan,PANGJing-jin,CHENMing,et al.Model Estimation of External Water Flow and Inflow Location in Sewage Pipe Network[J].China Water & Wastewater,2023,39(5):74-79.
Model Estimation of External Water Flow and Inflow Location in Sewage Pipe Network
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第5期
Page:
74-79
Column:
Date of publication:
2023-03-01
- Keywords:
- sewage pipe network; external water flow; inflow location; model; SWMM; pump station
- Abstract:
- The estimation of external water flow and location of inflow point is a difficult problem in sewage pipe network operation. Firstly, the dynamic equilibrium among domestic and industrial water consumption, pump station water level, pump station flow and external water flow was established by using the sewage pipe network comprehensive model, so as to estimate the external water flow. Then, the sewage pipe network mechanism model was applied to calculate the hydraulic state of the pipe network under the assumption of different external water intrusion points, and the operating hydraulic state of the actual sewage pipe network was compared to obtain the estimated location of the external water intrusion point in the sewage pipe network. The method was applied to search the external water in an area. After plugging the source of external water, the sewage flow in this area decreased from the average flow of 2.0×104 m3/d in dry season to approximately 0.5×104 m3/d which was equivalent to the actual water consumption, and the average COD increased from 92.4 mg/L to 290.2 mg/L. Other pollution indicators, such as ammonia nitrogen, TN, TP, SS and VSS, were all increased by more than three times. The sewage pipe network was changed from full pipe flow with high water level to non-full pipe flow with low water level. The method for estimating external water flow and inflow location based on sewage pipe network model is helpful to improve the operational quality of sewage pipe network and improve the quality and efficiency of sewage treatment.
Last Update:
2023-03-01