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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 42732 (09)
- University: Sharif University of Technology
- Department: Civil Engineering
- Advisor(s): Agha Mohammad Hossein Tajrishi, Massoud
- Abstract:
- In recent decades, local, regional and national research programs have discovered stormwater runoff as the principal cause of water pollution in most urban areas. To solve urban stormwater runoff problems, we should use revisory measures. This is possible by using Best Management Practices (BMPs). BMPs are innovative technologies to reduce the movement of pollutants from land into surface or groundwaters, in order to protect water quality within natural and economic limitations.Three types of BMPs are discussed in this study; swale, bioretention systems and pond. They have different installation requirements, costs and pollutant removal efficiency. The main objective of this research is to find out the minimum cost combinations of these three BMPs, to reduce the concentration of total suspended solids, total phosphorous and total nitrogen in order to achieve water quality standards for urban streams in Maqsoudbeig watershed in north of Tehran.Two models are used for this purpose: Watershed and Economic Model. Watershed model (MUSIC) provides stormwater and pollutant simulations and calculates BMP's pollutant removal rates. The outputs of watershed model serve as inputs to economic model. GAMS (General Algebraic Modeling System) provides minimum cost optimization procedure. Another input for economic model is BMP's life cycle cost. Structural stormwater BMPs demand initial capital investments for design and construction and annual operating and maintenance costs. After calculating inflation and interest rates based on a 20-year life period, the present worth of annual operation and maintenance cost was calculated and added to construction and design costs.Results show that installing 1650 m2 swales which cost 62.86 million toman is the least expensive option to construct and maintain. These results can be used for decision making and help to find a balance between environmental protection and urban development
- Keywords:
- Urban Runoff ; Best Management Practices ; Life Cycle Cost (LCC) ; Model for Urban Stromwater Improvement Conceptualization (MUSIC) ; General Algebraic Modeling System (GAMS) ; Maqsoudbeig Watershed
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