| Title |
The Improvement on the Empirical Formula of Stormwater Captured Ratio for Water Quality Volume Based Non-Point Pollutants Water Quality Control Basins |
| Authors |
최대규 ( Dae Gyu Choi ) ; 박무종 ( Moo Jong Park ) ; 박배경 ( Bae Kyung Park ) ; 김상단 ( Sang Dan Kim ) |
| DOI |
https://doi.org/10.15681/KSWE.2014.30.1.087 |
| Keywords |
Non-point pollutant source; Stormwater captured curve; TMDL; Water quality control basin |
| Abstract |
According to the technical guideline of water pollutant load management, the rainfall captured ratio which can be estimated by the empirical formula is an important element to estimate reduction loads of nin-point pollutants water quality control basin. In this study, the rainfall captured ratio is altered to stormwater captured ratio considering its meaning in the technical guideline of water pollutant load namagement, and the new empirical formula of stomwater captured ratio is suggested. In order to do this, we calculate stormwater captured ratio by using the hourly rainfall data of seven urban weather stations (Busan, Daegu, Daejeon, Gangreung, Seoul, Gwangju, and Jeju) for 43 years. The regression coefficients of the existed empirical formula cannot reflect the catchment properties at all, because they are fixed values regardless of regions. However the empirical formula of storm water captured ratio has flexible regression coefficients by runoff coefficient(c), so it is allowed to consider the characteristics of runoff in catchment. It is expected that reduction loads of storage based water quality control basin can be more reasonably estimated than before. |