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ISSN: 2641-6794

Open Access Journal of Environmental & Soil Science

Review Article(ISSN: 2641-6794)

Impervious Surfaces an Indicator of Hydrological Changes in Urban Watershed: A Review

Volume 4 - Issue 1

Lakhvinder Kaur1, Madhuri S Rishi1*, Sakshi Sharma1 and Ashu Khosla2

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    • 1Department of Environment Studies, Panjab University, India
    • 2Department of Geology, Panjab University, India

    *Corresponding author: Madhuri S Rishia, Department of Environment Studies, Panjab University, Chandigarh, India

Received: October 22, 2019;   Published: November 01, 2019

DOI: 10.32474/OAJESS.2019.04.000178

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Abstract

In water scarce urban areas of the present world, groundwater management is a major environmental concern. Replenishment of water resources is a complex and slow process, which is catered mainly through the land surface from its contact on ground as a catchment area, infiltration inside, groundwater flow to groundwater recharge and its storage. Urbanization has been considered responsible for causing alterations in natural landscapes and hydrological cycle on a vast scale. Soil sealing by the construction of impervious surfaces not only impact the hydrology of that particular area but also hampers existing ecological balance of adjacent pervious area. However, not much knowledge has yet been gathered about impervious surfaces in relation to hydrological changes in the urban areas. Therefore, the current review investigates the effect of increasing impervious land area on various hydrologic components including rainfall, infiltration, surface runoff, evapotranspiration, groundwater recharge and its replenishment. The review highlights that the removal of natural vegetation and sealing of soils by building impervious surfaces impact the urban hydrology more significantly as it enhances the urban heat island effect and consequently increases the rainfall resulting in higher surface runoff volume and the stream peak flow rate leading to rising urban flood potential. It also adds to the lowering of groundwater replenishment, soil moisture and evapotranspiration, thereby disrupting the hydrological cycle.

Keywords: Urbanization; Impervious surfaces; Hydrological cycle; Evapotranspiration; Groundwater replenishment

Abstract| Introduction| Impact of Impervious Surfaces on Hydrological Cycle| Contamination Sources| Conclusion| References|

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