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Modeling the Flow and Infiltration of Surface Runoff in Swales

Behrang, Koorosh | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45874 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Agha Mohammad Hossein Tajrishi, Massoud
  7. Abstract:
  8. Urbanization and increase in impervious areas owing to building construction, pavements of streets, parking lots and sidewalks, amount of surface runoff in cities has been rose. One of the environmental problems of Tehran during the rainfall is the high polluted runoff flowing in the city and eventually transfers pollution to aquifers. So in order to decline the consequences of this polluted surface runoff, it is crucial to understand how the runoff and pollution form. One way of decreasing pollution in runoff is hiring swales attenuation potential. In this study, problems associated with runoff, particularly in relation to the formation, transformation and removal of pollutants from runoff has been explained. So modeling the formation and transport of runoff from impermeable surfaces to porous mediums (soil), are intended to examine the ability of soil to infiltrate runoff, the effect of changes in the initial conditions including the recharge over the swale. For the simulation governing equations of surface and subsurface extracted and then these equations solved simultaneously to investigate the effects of these two different modules on each other. Finally this simulation help understand the ability of conjunction model of surface and subsurface runoff in swales. The subsurface model verified with three experiments and the conjunctive model with one. Results developed in this study were in good agreement with other studies. The experiments choose to completely investigate the different conditions of precipitation and soil. At the end of the study model was calibrated by changing variables like soil type, initial condition, rainfall intensity and duration, manning coefficient, impervious to pervious surface ratio and slope. Soil type and initial condition were important in formation of runoff
  9. Keywords:
  10. Swale ; Numerical Modeling ; Urban Runoff ; Quantitative Changes

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