Open AccessA study of urban stormwater runoff and water quality control based on system coupling simulations
Author(s) -
Wenjun Wu,
Lei Ren,
Laifu Zhu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/826/1/012001
Subject(s) - rainwater harvesting , surface runoff , environmental science , drainage , flooding (psychology) , stormwater , hydrology (agriculture) , drainage system (geomorphology) , water quality , low impact development , storm water management model , pollutant , environmental engineering , stormwater management , geotechnical engineering , geology , psychology , ecology , chemistry , organic chemistry , psychotherapist , biology
This study constructed a coupling model of an urban drainage (rainwater) flooding prevention system. Multifactor measures such as the internal source control, drainage pipe network, flooding prevention, and drainage of the system are coupled, the entire process from rainfall to urban rainwater drainage is simulated, and the control and improvement effects of low-impact development (LID) measures on urban stormwater runoff and water quality under different rainfall conditions are discussed. The results showed the following: (1) The constructed coupling model of the urban drainage (rainwater) flooding prevention system has good applicability and can accurately simulate the process and characteristics of urban stormwater runoff and water quality. (2) After LID measures are added, the runoff process is delayed, and the duration of runoff increases. The peak outlet flow of the study area under rainfall with a return period of 2, 3, 10, and 20 years decreases by 66.5%, 57.2%, 51.0%, and 48.2%, respectively. The peak pollutant concentrations decrease, the peaks are delayed, and the minimum removal rate of pollutants under rainfall with a return period of 1, 3, and 5 years is 51.1%, 49.7%, and 37.6%, respectively. (3) The LID measures play a role in improving the runoff flooding in the study area.