Simulation of Groundwater Resources Supply and Demand by Applying WEAP Model in Toyserkan Plain
The Toyserkan plain in Hamedan province has faced a significant drop in groundwater levels. The aim of this study is simulation of the groundwater demand and supply for basic year (2011)¡ predicting them to 2025 and defining tree scenarios: 1-Efficiency of irrigation increasing¡ 2- change of land use¡ 3- urban water management¡ and evaluating them effects on groundwater demand and supply by WEAPs Model. Based on results¡ if continue demand current trend¡ the aquifer encounter drought and will occurred intensive critic for all demand sites in 2019. Result of change of land use scenario indicated that will be delayed becoming dry of aquifer to 2022. Urban water management scenario results indicated that groundwater storage in comparison to reference scenario increase annual from 2012 to 2020 and this increase arrive to 10.95 Mm3 in 2 . Based on results of Efficiency of irrigation increasing scenario¡ if Efficiency of irrigation arrive to 59.13 percent in agricultural sites¡ not only met all of demand sites water requirement¡ but also groundwater storage provide annual and gap between of groundwater demand and supply will arrive to minimum of self amount.
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