Evaluation of Permeable Pavement in Removing Pollutants from Surface Runoff

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kamali, Meysam | 2011

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 41805 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Tajrishi, Masoud; Nazari Alavi, Alireza
Abstract:
Urbanization expansion increases impermeable surfaces and ultimately produces more runoff from urban surfaces. The runoff in the urban streets moves the pollution with high levels from the city and then collects into channels where they are transported into the water courses. The most important factor in runoff polluting is sediments. If you remove sediments from runoff, their quality will be improved. One of the effective systems to reduce sediments from the surface runoff is permeable pavement. In this study a simulator system is used. The sample of permeable pavement analysed consisted of two layers of geotextile beddig, filter granular layer (2.36 to 4.75mm), subbase granular layer (4.75 to 20 mm) and concrete blocks. The area and slope is 2m2 and 2%, respectively .This study evaluates the life efficiency of permeable pavement subject to sediment loading and also evaluate it in removing pollution from the artificial surface runoff. Over a simulated 7 years of sediment loading conducted in the laboratory, the results showed 100% sediment retention, with runoff coefficient 0.35 at the end of the seventh year of simulations. An analysis indicated that the ammonia-nitrogen removal efficiencies were 56%
Keywords:
Urban Runoff ; Sediments ; Permeable Pavement ; Pollution Removal

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