摘要
根据日喀则市区地下水开采现状与含水系统结构特征,建立了二维地下水数值模型,利用研究区的观测井实测水位对模型进行校正和检验,并开展了模型参数的敏感性分析,发现渗透系数对模拟结果最为敏感。进一步将校准后的数值模型用于预测研究区未来逐步扩大化开采地下水条件下的地下水流场。结果表明,与现状条件相比,2030年研究区各地下水水源地的地下水位表现为下降趋势,其地下水位平均下降2.25m,尤其在北郊水厂抽水井附近最大降深超过7m。结果可为日喀则市东嘎水库兴建的必要性论证与备用水源地的建设提供依据。
Based on the current exploitation status and the structural characteristic of aquifer system,this paper established a two-dimensional numerical model for simulating the groundwater system in Shigatse City.The model was calibrated and validated using the measured groundwater level at the observation well in the study area,and then the calibrated model was used to predict groundwater changes in the aquifer.Sensitivity analysis in the hydrogeology parameters shows that the model is very sensitive to the hydraulic conductivity.The prediction results show that the groundwater level can be reduced by 2.25 m,and the maximum level near the pumping well in the northern suburbs exceeds 7 m.The results provide a scientific implication for the construction of the Dongpu Reservoir and water resources management.
作者
张路
林锦
闵星
孙晓敏
吴剑锋
ZHANG Lu;LIN Jin;MIN Xing;SUN Xiao-min;WU Jian-feng(School of Earth Sciences and Engineering,Nanjing University,Nanjing 210023,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China)
出处
《水电能源科学》
北大核心
2020年第4期76-79,共4页
Water Resources and Power
基金
国家重点研发计划(2016YFC0402807)
国家自然科学基金项目(41772254)。
关键词
地下水
水均衡
敏感度分析
GMS
数值模拟
日喀则市区
groundwater
water balance
sensitivity analysis
GMS
numerical simulation
Shigatse City
