Recharge sources and chemical composition types of groundwater and lake in the Badain Jaran Desert, northwestern China
Recharge sources and chemical composition types of groundwater and lake in the Badain Jaran Desert, northwestern China
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DOI：
10.1007/s11442-012-0941-2
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发表时间：
2012-06
影响因子：
4.9
通讯作者：
Tianjie Shao;Jingbo Zhao;Qi Zhou;Z. Dong;Yandong Ma
中科院分区：
文献类型：
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作者：
Tianjie Shao;Jingbo Zhao;Qi Zhou;Z. Dong;Yandong Ma
通过对巴丹吉林沙漠湖水和浅层地下水离子化学组成的分析，探讨了沙漠区湖水和浅层地下水的离子化学组成特征、湖水的空间分异以及可能的补给来源。结果表明，湖水的pH值、矿化度、矿化度和电导率均大于地下水。水样中离子含量以Na+和Cl−为主。高盐度湖泊多为Na（K）-Cl-（SO 4）型，少数低盐度湖泊为Na-（Mg）-（Ca）-Cl-（SO 4）-（HCO 3）型。地下水多为Na-（Ca）-（Mg）-Cl-（SO 4）-（HCO 3）型，属亚盐湖型，少数为Na-Cl-SO 4型，在盐湖下流动。东南部湖泊的pH、盐度、TDS和电导率相对较低，存在微碱性湖泊。北方湖泊的pH值、盐度、TDS和电导率远大于东南部湖泊，北方湖泊为中碱性和咸性湖泊。在巴丹吉林沙漠东南部，湖水离子化学特征由南向北呈现亚咸→咸→高咸的变化趋势。近9年来离子化学组成的变化趋势表明，博里陶勒盖、巴丹、诺尔图和呼和吉林湖大部分离子含量呈下降趋势，说明近9年来淡水补给量呈增加趋势。湖水离子化学组成表明，巴丹吉林沙漠湖水的流向为东南西北。湖水和地下水的离子化学成分、砂层水位高度含水率及系统聚类分析表明，湖水主要由当地降雨和雅布赖山、黑山头山降水入渗补给，祁连山补给几乎不可能。
Based on the analysis of ion chemical composition of lake water and shallow groundwater in the Badain Jaran Desert, this paper discussed the characteristics of ion chemical composition, spatial variation of lake water, and possible supply sources of lake water and groundwater in the desert areas. The results show that the pH, salinity, TDS and electrical conductivity of the lake water are greater than those of groundwater. The ion contents of water samples are dominated by Na+and Cl−. Most of the higher salinity lakes are Na (K)-Cl-(SO4) type, and a few of low salinity lakes belong to the Na-(Mg)-(Ca)-Cl-(SO4)-(HCO3) type. Most of the groundwater is Na-(Ca)-(Mg)-Cl-(SO4)-(HCO3) type, attributed to subsaline lake, and only a few present the Na-Cl-SO4type, flowing under saline lake. The pH, salinity, TDS and electrical conductivity in the southeastern lakes are relatively low, and there are slightly alkaline lakes. The pH, salinity, TDS and electrical conductivity in the northern lakes are much greater than those of the southeastern lakes, and the northern lakes are moderately alkaline and saline ones. In the southeastern part of the Badain Jaran Desert, the ion chemical characteristics of the lake water from south to north show a changing trend of subsaline →saline→hypersaline. The changing trend of chemical compositions of ions in recent 9 years indicates that most of the ion contents have a shade of reduction in Boritaolegai, Badain, Nuoertu and Huhejilin lakes, which state clearly that the amount of fresh water supply is increasing in the 9-year period. The ion chemical composition of the lake water reveals that the flow direction of lake water is from southeast to northwest in the Badain Jaran Desert. The ion chemical composition, moisture content of sand layer water level height and hierarchical cluster analysis of the lake water and groundwater demonstrate that the lake water is mainly supplied by local rainfall and infiltration of precipitation in Yabulai Mountains and Heishantou Mountain, and the supply from the Qilian Mountains is almost impossible.