Impact of urbanization on groundwater recharge and urban water balance for the city of Hyderabad, India

Groundwater recharge processes in an urban area are different than in non-urban areas. There are various new components that must be considered in the case of urban groundwater recharge in addition to the natural recharge from precipitation. These various components are estimated in this study based...

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Published inInternational Soil and Water Conservation Research Vol. 6; no. 1; pp. 51 - 62
Main Authors Wakode, Hemant Balwant, Baier, Klaus, Jha, Ramakar, Azzam, Rafig
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2018
KeAi Communications Co., Ltd
Subjects
aquifers
equations
evapotranspiration
geographic information systems
groundwater
Groundwater recharge
Hyderabad
India
remote sensing
runoff
SCS Curve Number (CN)
sewage
soil
urban areas
Urban recharge from leakage
Urban water balance
urbanization
water conservation
water supply
India
Urban water balance
Groundwater recharge
SCS Curve Number (CN)
Urban recharge from leakage
Hyderabad
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Summary:Groundwater recharge processes in an urban area are different than in non-urban areas. There are various new components that must be considered in the case of urban groundwater recharge in addition to the natural recharge from precipitation. These various components are estimated in this study based on the water balance equation for the Hyderabad city of India. Initially, urban recharge components including leakages from water supply network and sewage networks were calculated. To estimate the natural recharge from precipitation, actual evapotranspiration and surface runoff were estimated using remote sensing and GIS techniques. Results indicated that the urban recharge component of groundwater was more than ten times greater than the natural recharge. The net urban recharge component of groundwater was estimated to be approximately 568mm yr-1 and the natural recharge component was observed to be 53mm yr-1. Water inflow and outflow components were also estimated to provide the complete scenario of the total urban water balance of Hyderabad. This analysis has provided the information regarding the extent and intensity of percolation of urban contaminants into the aquifer.
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ISSN:2095-6339
DOI:10.1016/j.iswcr.2017.10.003