Evaluation of Water Resources Vulnerability using WEAP Model in Swarnrekha River Basin Jharkhand India

Abstract

he allocation of limited water resources poses a challenge when demand from different newlinestakeholders is gradually increasing. Demand supply analysis for the different scenario can newlinehelp the planners for better allocation of these precious natural resources. The present study newlineapplies the Water Evaluation and Planning System (WEAP) Model to evaluate water resources newlinevulnerability under future climatic conditions in the middle reach of the Swarnrekha river newlinebasin, Jharkhand, India. The Subarnekha river basin covers the area in the states of Jharkhand, newlineOdisha and comparatively smaller parts in West Bengal. The WEAP model was developed by newlinethe Stockholm Environment Institute (SEI) for evaluating the planning and management of newlinewater resource systems. Demand sites were classified as an industry, water demands of newlineinstitutional, agriculture, and human and livestock population. Each demand site was newlineconnected to its source and where applicable a return link was made to a river. Annual water newlineuse rate/person, per hectare for agriculture and per head of livestock were determined and newlinechanged into cubic meter per annum and used as input to the WEAP model. newlineFor the WEAP modelling framework, the year 2017 was chosen as a current year for newlinewhich all available required information and input data were given to the model and future newlinewater demand situation was analyzed for the period 2018 2030. It has been observed dry newlineconditions with an annual rainfall of nearly 624.8 mm for the year 2010. Whereas, the year newline2011 and 2013 experienced high rainfall (1836.4 and 1779.8 mm) resulting in wet conditions. newlineThe maximum flow to the groundwater storage was found in the monsoon months as compared newlineto the non-monsoon months as an obvious phenomenon. newline