Rainfall on the relocation of the catchment area of the impact of BMP-targeted
The purpose of this study to investigate the non-point source pollution caused by water pollution of water catchment areas, non-point source pollution problems getting worse. Often because of a rainstorm or more places will bring all kinds of pollutants as the irregular movement of water runoff, pollution caused by the dispersion. In this case a virtual design district catchment basin is divided into nine sub-basins, heavy rain washed away the early water catchment area is contaminated or whether the critical moment, the rainfall in different characteristics and under different terrain such as grass ditch or stranded pool, caused by For the concentration of pollutants will have an impact on water quality and change.
BMPs in testing, design virtual catchment areas of land and use of stagnation flow pool and grass ditch on the non-point source pollution control simulation tests, applications WinVAST model database functions and calculus to understand the difference between rainfall in different BMPs And the different characteristics of the best management practices (+ grass ditch stranded pool) unless the point source pollution to the efficiency and understand the changes in the concentration of pollutants, the economic effects of the configuration design.
Keyword: non-point source pollution, BMPs, grass ditch, retention ponds, WinVAST