| Big had line of tata edge river in qinghai province to the groundwater in thediluvial fan area is relatively abundant, development and utilization of groundwaterlevel is low. In recent years, as a result of nearby residents, enterprises have difficultyin water, to find and establish new water source of water supply is needed. In thispaper, on the basis of detailed analysis of hydrogeological data, the recharge summethod is adopted, excretion combined mining method, the cross section flow methodand pumping test method to evaluate the proposed protection of groundwaterresources, the hydrogeological conceptual model and numerical model is set up toevaluate three prediction scheme is put forward, further evaluation of proposed waterallow production and protection measures are put forward. Paper the main researchcontents and conclusions are as follows:（1） detailed analysis of hydrogeological data, studied the forming conditions,the occurrence of regional groundwater, water features, runoff, water content,dynamic type, type of water chemistry.（2）analysis of hydrogeological data, using the pumping test method, empiricalformula method and regression analysis method to determine the hydrologicalgeological and hydrological parameters, the river flow, unit length of typical years,releasing amount of seepage quantity, recharge sum method, excretion summationmethod and the cross section flow method to calculate the natural groundwaterrecharge, respectively is28.65m3/d,11.06m3/d,20.55m3/d, comparative analysisit is concluded that natural groundwater recharge is28.65x104m3/d.（3）mining pumping test method is used to evaluate the proposed water allowsthe production, the test results show that when water output gradually increased to5.16from1.82x104m3/d by104m3/d, pumping Wells in a value of0.01~0.01m,and with a continuation of the time, the pumping well is a stable, drawdown isbetween2.22~8.04m. This shows that the proposed in the study area water source in5.00x104m3/d pumping, pumping water mining is assured.（4）after generalized hydrogeologic conditions, establishing hydrogeologicalconceptual model, using with Processing Modflow software simulation to simulate thegroundwater flow conditions, and then identify and correct model, after the extractionand identification of parameters of groundwater equilibrium analysis, the results showthat the groundwater in the basin, excretion and recharge, equal to28.78x104m3/d, and the recharge coincided basically with the combined method of recharge, thecorrected model, can be predicted as a study area after water development andutilization, groundwater balance situation, to permit the production guarantee degreeevaluation is feasible.(5) on the basis of the proposed water source allows production evaluation, setup with the status quo of flow field simulation, the numerical model is established toput forward three kinds of prediction scheme, the results show that tata edge riveralluvial fans, diving status quo recharge is28.78x104m3/d, production of5.0x104m3/d, accounting for17%of the total recharge, in every even dry, water leveldrawdown and drilling well down deep value of6.31and22.0m respectively,compared with40m water allow water level drawdown, water drawdown valueswithin the scope of the permit, from the perspective of water quantity and water leveldrop is assured, mining technical condition is completely feasible.（6） in the study area at scuba diving pluvial fan hydrochemistry type HCO3,CL-Ca, Na water is given priority to, salinity is less than0.5g/L. Sections of iron ion(Fe2+and Fe3+) levels of diluvial fan in individual locations of chloride sulfate andchloride（SO42-, CL-）and hard precipitation, non-corrosive, sparkling boiler exceedsbid, the indicators meet the national water quality standards.（7）after the prediction, evaluation as a drinking water supply in the study area,on the basis of the change of groundwater, studied the regional groundwaterprotection measures: to establish and perfect the system of water, to set up thegroundwater dynamic observation. |
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