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

International Soil and Water Conservation Research

Ramakar Jha¹  Hemant Balwant Wakode²  Klaus Baier²  Rafig Azzam² 

[1] Department of Civil Engineering, National Institute of Technology (NIT) Patna, Patna, Bihar 800005, India;Department of Engineering Geology and Hydrogeology, RWTH Aachen University, Lochnerstr. 4-20, 52064 Aachen, Germany;

关键词: Groundwater recharge;    Urban water balance;    SCS Curve Number (CN);    Urban recharge from leakage;    Hyderabad;   

DOI  :  10.1016/j.iswcr.2017.10.003

来源: DOAJ

【 摘 要 】

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 568 mm yr-1 and the natural recharge component was observed to be 53 mm 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.

【 授权许可】

Unknown