Groundwater Resource Evaluation Of Xiangride-nuomuhong Piedmont Plain

Water resources are the foundational natural resources for economic and social development.With the growth of population and social economy, the demand of water resources is increasingsharply. water resources shortage is a worldwide problem.Hence, it is necessary to evaluate thegroundwater resources for resources sustainable utilization.Xiangride-Nuomuhong piedmont plain locates in southeast of Qaidam Basin, north ofKunlun Mountains, is groundwater-bearing zone where the massive Neozoic sediment is goodaquifer.The aim of this study is to simulate the underground flow, evaluate allowable productionunder various cases and optimize exploitation plan. This is the requirements of futuregroundwater exploitation and water resources management.On the basis of fully collecting and analyzing relative materials such asgeology,hydrogeology and environment of the study area, the paper explains systematicallythe cause and litho logy of the main stratum in the research area, and analyzes the law ofrecharge, runoff, drainage and dynamic characteristics of the groundwater.After confirming therange of simulation district and object layer for calculation and generalization hydrauliccharacteristics, vertical and lateral boundary, a groundwater mathematical model is set up.Processing MODFLOW which is based on finite difference method is employed to solve thenumerical equations.Based on the numerical model, allowable production of6water supply fieldis evaluated, which can be73×104m3/d.The region exploitation coefficient is27.9%after the establishment of6water supply field.Meanwhle the discharge of spring and evaporation decreases obviously, up to46.66×104m3/d(26.3%) and the quantity discharged into lake decreases for48×104m3/d.This is affordablefor the aquatic environment and ecological environment.