Numerical Simulations of Non-Point Source Pollution in a Small Urban Catchment: Identification of Pollution Risk Areas and Effectiveness of Source-Control Measures

Urban non-point source pollution is becoming a serious issue under the context of rapid urbanization and its impacts on surface hydrologic processes. The identification risk areas effectiveness source-control measures provides important first steps to improve degrading aquatic environment but challenged by complex dynamics variabilities pollutants in urban environments. In this study, we investigate spatial temporal small catchment based numerical simulations in-situ samplings. Our results show that residential, industrial, commercial land contribute most pollutant loadings are main constituents area. Rainfall duration intensity factors determining variations pollution. There no correlation between early drought days load. Numerical it more effective increase vegetation coverage than enhance road cleaning for non-surface control. For enhanced cleaning, frequency efficiency. provide guidance controls as well establishment long-term monitoring network