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Study of diffuse source pollution management for land use and drainage system planning
1Department of Environmental Systems Engineering, Ritsumeikan University, Kusatsu City, Shiga Pref., Japan.
Summary
This study quantifies urban pollutant runoff into Lake Biwa, assessing strategies like pollutant removal and land use planning to mitigate diffuse pollution. Findings offer insights for managing stormwater impacts on water bodies.
Area of Science:
- Environmental Science
- Hydrology
- Urban Planning
Background:
- Diffuse pollution from urban areas significantly impacts water bodies like Lake Biwa.
- Understanding pollutant mass balance during dry and wet weather is crucial for effective management.
Purpose of the Study:
- To clarify the mass balance of pollutants during dry periods and storm events.
- To evaluate the effectiveness of pollutant removal, land use planning, and new drainage systems through simulation.
- To provide insights for solving diffuse pollution problems in urban environments.
Main Methods:
- Estimation of pollutant loads entering Lake Biwa using local government data.
- Collection and analysis of additional samples from road surfaces, roofs, and parking lots to assess land use influence.
- Introduction and discussion of ongoing Best Management Practices (BMP) projects in urban areas.
Main Results:
- Quantified pollutant entry into Lake Biwa from urban sources.
- Identified the role of land use in pollutant runoff dynamics.
- Gained insights into the potential impacts of various pollution control strategies.
Conclusions:
- Developed a better understanding of urban diffuse pollution sources and pathways.
- Identified potential strategies for mitigating pollutant loads entering Lake Biwa.
- Provided a basis for informed decision-making in urban water quality management.