ZHANGHong-yu,LILi,ZHAOZhi-wei,et al.Construction and Calibration of Water Quality Model of Mountainous City Pipe Network Based on Mike Urban[J].China Water & Wastewater,2023,39(21):131-138.
Construction and Calibration of Water Quality Model of Mountainous City Pipe Network Based on Mike Urban
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第21期
Page:
131-138
Column:
Date of publication:
2023-11-01
- Keywords:
- water quality model; Mike Urban; combined sewage pipe network; mountainous city; calibration
- Abstract:
- The spatial environment of mountainous cities is unique, and its pipe network model is quite different from that of plain cities. Based on the characteristics of mountainous cities, a pipe network hydraulic model of the service area of Lijiatuo Wastewater Treatment Plant in Chongqing was established by using Mike Urban, and a coupled hydraulic and water quality model was constructed by combining the measured water quality data in the whole process of different rainfall events. The influence of each factor on the quality of the model was investigated by calibration of orthogonal test method, and the optimal parameter combination was obtained. After calibration, the Nash-Sutcliffe efficiency coefficients (NSE) of COD, total nitrogen, ammonia nitrogen and total phosphorus reached 0.728 8, 0.627 1, 0.660 1 and 0.695 9, respectively, which significantly improved the quality of the model. This paper proves the feasibility of the calibration method, and provides constructive significance for the operation of wastewater treatment plants in the test area.
Last Update:
2023-11-01