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Water Quality Modeling of Urban Streams

Soltani, Maryam | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39606 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Tajrishy, Masoud
  7. Abstract:
  8. With altering natural state and increasing impervious surfaces, traditional urbanization leads to deteriorating the environment and water catchments. During the years most efforts in order to control the urban runoff outflow, have been focused on quantity; and awareness about improving water quality has been raised just in the last few years and, which emphasizes on pollution source control. Standard water quality sampling methods are time consuming, expensive and because of sampling in broad geographic areas, difficult; however modeling is a more efficient way in assessing water quality and as worries about non-point source pollution grows, different kinds of models have been used to predict runoff, sediment and pollutant routing and simulate various kinds of land use. With simulating and evaluating scenarios with minimum environmental impact, models also can assist decision makers in planning best management practices for urban runoff; without trial and error. In this research, runoff volume and existing pollutants in Velenjak stream (located in the north area of Tehran) are modeled using SWMM and MUSIC softwares, to simulate current quantity and quality conditions of this stream and compare it with similar monitoring results. Based on these results and to improve water quality of the stream, different scenarios of a few best management practices including Swale, Wetland and Bio-retention system are presented and evaluated using MUSIC model. Finally, Swale with proposed dimensions in the 4th scenario (total length of 38800 meter), the Wetland in Mirdamad metro district with area of 2 hectares and Bio-retention system based on 4th scenario (total area of 7300 m2 ), have been chosen as the most effective scenarios.
  9. Keywords:
  10. Modeling ; Storm Water Management Model (SWMM)Software ; Urban Runoff ; Best Management Practices ; Model for Urban Stromwater Improvement Conceptualization (MUSIC)

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