Stable isotopic and geochemical identification of groundwater evolution and recharge sources in the arid Shule River Basin of Northwestern China
Stable isotopic and geochemical identification of groundwater evolution and recharge sources in the arid Shule River Basin of Northwestern China
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DOI：
10.1002/hyp.10495
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发表时间：
2015-10-30
影响因子：
3.2
通讯作者：
Jia, Bing
中科院分区：
文献类型：
--
作者：
Guo, Xiaoyan;Feng, Qi;Jia, Bing
利用稳定同位素（D-VSMOW和O-18（VSMOW））和地球化学特征对疏勒河流域地下水补给的地球化学演化和来源进行了研究。祁连山山前泉水、玉门-塔什地下水和瓜州地下水分别为Ca-HCO 3、Ca-Mg-HCO 3-SO 4和Na-Mg-SO 4-Cl型沃茨。地下水总溶解性固体（TDS）和主要离子（Mg 2+、Na+、Ca 2+、K+、SO 42-、Cl-和NO3-）浓度从山前向下游逐渐增加。地下水地球化学演化可能是矿物溶解、混合过程和沿着地下水流路径蒸发蒸腾作用的综合作用。通过对融水、泉水、河水、YTG和GZG的同位素和地球化学变化以及端元混合分析（EMMA），表明山前泉水主要来源于降水、融水入渗和上游河流;山前侧向地下水和中游河水可能是引黄工程的有效补给源，降水对引江入川的贡献非常有限，引江入川主要由玉门-扎西盆地的地下水侧向补给和灌溉回流补给。初步查明了疏勒河流域地下水的基本特征，为疏勒河流域地下水与地表水资源的综合管理提供了依据。版权所有（c）2015约翰威利父子有限公司
Stable isotopic (D-VSMOW and O-18(VSMOW)) and geochemical signatures were employed to constrain the geochemical evolution and sources of groundwater recharge in the arid Shule River Basin, Northwestern China, where extensive groundwater extraction occurs for agricultural and domestic supply. Springs in the mountain front of the Qilian Mountains, the Yumen-Tashi groundwater (YTG), and the Guazhou groundwater (GZG) were Ca-HCO3, Ca-Mg-HCO3-SO4 and Na-Mg-SO4-Cl type waters, respectively. Total dissolved solids (TDS) and major ion (Mg2+, Na+, Ca2+, K+, SO42-, Cl- and NO3-) concentrations of groundwater gradually increase from the mountain front to the lower reaches of the Guazhou Basin. Geochemical evolution in groundwater was possibly due to a combination of mineral dissolution, mixing processes and evapotranspiration along groundwater flow paths. The isotopic and geochemical variations in melt water, springs, river water, YTG and GZG, together with the end-member mixing analysis (EMMA) indicate that the springs in the mountain front mainly originate from precipitation, the infiltration of melt water and river in the upper reaches; the lateral groundwater from the mountain front and river water in the middle reaches are probably effective recharge sources for the YTG, while contribution of precipitation to YTG is extremely limited; the GZG is mainly recharged by lateral groundwater flow from the Yumen-Tashi Basin and irrigation return flow. The general characteristics of groundwater in the Shule River Basin have been initially identified, and the results should facilitate integrated management of groundwater and surface water resources in the study area. Copyright (c) 2015 John Wiley & Sons, Ltd.