DUSui,WANGYang,HONGYue-ju.A Model with Double EXP Function for Runoff Coefficient Calculation in Wuhan[J].China Water & Wastewater,2024,40(6):60-66.
A Model with Double EXP Function for Runoff Coefficient Calculation in Wuhan
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第6期
Page:
60-66
Column:
Date of publication:
2024-03-17
- Keywords:
- instantaneous comprehensive runoff coefficient; double EXP function; cumulative rainfall; regional average population density
- Abstract:
- The national standard evaluates the comprehensive runoff coefficient based on the technical conditions of urban building density and design recurrence period. In this paper, the runoff coefficient calculation model with double EXP function was established by using two runoff calculation indexes of regional average population density and cumulative rainfall, and the fixed values specified in the national standard was transformed into dynamic values. The instantaneous comprehensive runoff coefficient calculated by this model conformed to the numerical characteristics of 0-1 and the S-curve variation. The storm peak flows of Tianjin Road drainage system with the highest population density area and Gangxi drainage system with the general population density area in Wuhan calculated by the instantaneous comprehensive runoff coefficient were compared with those specified in the national standard, which indicated that the performances of urban rainwater drainage system and the urban waterlogging control system increased by 35.7% and 11.6%, respectively. The calculation model has significant benefits for optimizing stormwater engineering design and improving urban waterlogging control system.
Last Update:
2024-03-17