敦煌月牙泉地区人工回灌下的地下水动态模拟.PDF

第29卷第2期 水摇 资摇 源摇 保摇 护 2013年3月 Vol.29 No.2 WATER RESOURCES PROTECTION Mar. 2013 DOI:10.3969/ j.issn.1004 6933.2013.02.005 敦煌月牙泉地区人工回灌下的地下水动态模拟 1 1 1 2 刘摇 畅 ,成建梅 ,苏春利 ,杨俊仓 (1.中国地质大学(武汉)环境学院,湖北 武汉摇 430074;2.甘肃省地质环境监测院,甘肃 兰州摇 730050) 摘要:在研究敦煌盆地水文地质条件的基础上,应用FEFLOW软件建立月牙泉地区浅层地下水三 维不稳定流数值模型,重点分析人工回灌场(A场、C场)对月牙泉地区地下水系统的影响,探讨影 响月牙泉湖水位动态的主要因素,预测最佳人工回灌方式。 结果表明:区内水位的抬升和波动主要 由渠系渗漏和C场注水引起;人工回灌并未宏观改变模拟区原有地下水渗流场补径排条件,只是 3 局部促进或阻碍地下水径流;A场以回灌量2500m / d 为最优方案。 关键词:地下水;数值模拟;人工回灌;月牙泉;敦煌市;西北干旱区 中图分类号:P641郾25摇 摇 摇 文献标志码:A摇 摇 摇 文章编号:1004 6933(2013)02 0022 06 Numerical study of groundwater dynamics with artificial recharge in Yueya Spring area,Dunhuang City 1 1 1 2 LIU Chang ,CHENGJianmei ,SU Chunli ,YANGJuncang (1. School of Environmental Studies,China University of Geosciences,Wuhan430074,China; 2. Geological EnvironmentalMonitoring Institute of GansuProvince,Lanzhou730050,China) Abstract:Based on analysis of the hydrogeological conditions of the Dunhuang Basin, a three鄄dimensional numerical model focusing on the shallow unsteady groundwater flow system was built for the Yueya Spring areas using the FEFLOW software. The impacts of artificial recharge (in areas A and C) on the groundwater system of the Yueya Spring were investigated. The main factors that may lead to significant changes in thewater level of the Yueya Spring were summarized,andthe optimal artificial rechargepatternwasobtainedwith theprediction model. The numerical results show that the change of thewater level in the study area mainl