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The Influence of Urban Development Density on Water Pollution

The Influence of Urban Development Density on Water Pollution. Kyushik Oh and Dong woo Lee Department of Urban Planning Hanyang University, Korea. Introduction. Occurrence of many kinds of Environmental problems by urban developments

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The Influence of Urban Development Density on Water Pollution

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  1. The Influence of Urban Development Density on Water Pollution Kyushik Oh and Dong woo Lee Department of Urban Planning Hanyang University, Korea

  2. Introduction • Occurrence of many kinds of Environmental problems by urban developments • Need for comprehensive water quality management approach such as Total Maximum Daily Load Program (TMDL) • Need for Cumulative impacts for SEA (Strategic Environmental Assessment)

  3. Using in the decision making of urban planning Assistance in the enforcement of SEA of EIA Objective Analyzing the pattern of cumulative impacts on water pollution caused by urban developments

  4. Exceeding an environmental carrying capacity • Occurrence of serious environmental problems Concept of cumulative impacts • Result of interactions between incremental developments projects in space and time periods

  5. BunDang YongIn The study area and methods • Study area • The upper reaches of the Tancheon watershed area

  6. Before development (1985) After development (2003) • Remote sensed data on study area

  7. Urban area Population Employee Rainfall data Water quality data Urban Developments Factor Analysis of rainfall data … Pollution intensity for seasons Urban developments increase Comparison of the increase of BOD intensity with the increase of urban developments Identification of patterns of water pollution • Methods

  8. Sub-basins and water quality observation points Legend

  9. Result Urban area Population The diffusion of a sewerage Employees

  10. Changes of BOD intensity Dry season Wet season • Results of hierarchical cluster analysis on rainfall • Dry season: January-May, October-December • Wet season: June-September

  11. Patterns of water pollution WQOP1 WQOP2 Urban area Popu- lation

  12. WQOP1 WQOP2 Employee Water pollution is getting more serious by urban developments

  13. Patterns of water pollution

  14. Conclusions • Results • Observing cumulative impacts occurred as a result of urban developments • Demonstrating the need for considering cumulative impacts for an effective water quality management • Limitations • Insufficient water quality observation data • Considering urban developments as only sources of cumulative impacts

  15. Cumulative Impacts of Urban Developments on Water Pollution Kyushik Oh and Dong woo Lee Department of Urban Planning Hanyang University, Korea

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