Study On Sustainable Utilization Of Water Resource Of The Groundwater Storage In Dagu River

This paper is accomplished on the basis of Key Scientific and Technological Project of Qingdao City, the study of pollution control and optimized utilization of water resources in Dagu River Valley. In recent years, many barrages have been founded in Dagu River, which greatly change the conditions of the exploitation and supply of groundwater.On the basis of calibration of mathematical model of hydrogeology, the effect ofdiversified factors on the variation of groundwater is analyzed using Visual Modflowsoftware, the recharge capacity of Rubber Dam to the groundwater storage is studiedand the allowable withdrawl of groundwater with the influence of manpower iscalculated again.First, the hydrogeological conditions and characteristics are gathered up and thehydrogeological concept model is generalized. Next, through collecting completely andanalyzing systematically the rainfall, evaporation, surface runoff and observation datumof the groundwater water level, all hydrogeological parameters of this area is defined,then mathematical model of groundwater of Dagu River is built.Using the calibrated model, the effect of diversified factors in the variation ofgroundwater is analyzed. The result shows that, the change of groundwater level hasclose relation with the rainfall. In the meanwhile, with the built of Rubber Dam, it isalso been one of an important supply source of the groundwater storage.Aiming at the recharge capacity of Rubber Dam to the groundwater storage, the excitedwater supply of the dam caused by the exploitation of industry is discussed bymathematical simulation.The results are as follows: (1)If we increase the pumping water by 493 X 104m3, theamount of leakage recharge of Rubber Dam will rise by 231X 104m3; which indicates pumping by Rubber Dam can excite much more surface water infiltrate so as to supply groundwater. Thus the utilization ratio of water source is increased, and it provides the reliable guaranty for enough supply of the groundwater storage in wet year. (2) Under the condition of present status, the groundwater exploitable resource in wet year is 3670 × 104m3. The groundwater exploitable resource in medium precipitation year is 2054 × 104m3. The groundwater exploitable resource in draught year is 10951×104m3. The results can be used to instruct the actual exploitation and make the sustainable utilization of the groundwater source true.