DOI: 10.5176/2425-0112_UPPD17.60
Authors: Dr. Sheetal Sharma
Abstract: The management of surface water flooding is hindered by the characteristics of urban Drainage, and urban land uses. The presence, of large sealed surfaces in an urban area ( such as Buildings Roads, car parks) raises the volume of surface water runoff and lowers the underground water percolation from paved coverings. Similarly open and green vegetated spaces reduce direct runoff and facilitate the water infiltration to the ground and through evapotranspiration back into the air. Several studies carried out have modelled surface water runoff from different types of land uses and found that it increases with the proportion of built up areas. Despite these facts, some urban catchments still reveal a better natural water cycle though built up is more in them as compared to with less in others, but facing disturbed natural hydrological cycle. Therefore it is apparent that land use, land cover and the eva-po-transpiring surfaces have a significant influence on the behaviour of water in the urban water cycle and related surface runoff urban flooding, and ground water recharge. The paper attempts to correlate land use, land cover, built up and resulting runoff for urban watersheds. It also finds out correlation between local bye laws and behaviour of water cycle over it. For this purpose 19 urban water catchments were studied for their development scenario bye laws, built up, runoff and water tables for past 30 years and above. Observations were used to correlate urban parameters with hydrological ones and bring a model solution for balanced water cycle achievement during urbanization.
Keywords: Urban, Impervious Layer, Geology, Drainage, Runoff, Subsurface flow, Runoff Calculations recharge calculations, Built-up areas.
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