SUDing-jiang,LIUXi,DONGJia,et al.Definition and Calculation Method of Total Annual Runoff Pollutant Reduction Rate in Sponge City[J].China Water & Wastewater,2023,39(24):93-99.
Definition and Calculation Method of Total Annual Runoff Pollutant Reduction Rate in Sponge City
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第24期
Page:
93-99
Column:
Date of publication:
2023-12-17
- Keywords:
- sponge city; total annual runoff pollutant reduction rate; calculation method; low-impact development
- Abstract:
- Total annual runoff pollutant reduction rate is one of the basic control indicators of sponge city construction in China. This paper discussed the narrow and broad definitions of total annual runoff pollutant reduction rate from the perspective of engineering design feasibility. In the narrow sense, total annual runoff pollutant reduction rate is the proportion of pollutants removed from the formed runoff by rainwater facilities. The parameters required for calculation can be set according to the existing standards. However, it is not suitable to apply this calculation method when the total annual runoff control rate is selected from “1-rainfall runoff coefficient”. In the broad sense, total annual runoff pollutant reduction rate is the reduction ratio of runoff pollutants under low-impact development mode. The parameters required for calculation can not be calculated by existing standards. Therefore, an approximate calculation method was proposed. The generalized total annual runoff pollutant reduction rate can reflect the performance of permeable underlying surface for the removal of runoff pollutants. Therefore, it is recommended to adopt the definition of generalized total annual runoff pollutant reduction rate and its approximate calculation method in current engineering design.
Last Update:
2023-12-17