| 引用本文: | 陈添斐,王旭升,胡晓农,卢会婷,巩艳萍.巴丹吉林沙漠盐湖跃层对地下淡水排泄的指示作用.湖泊科学,2015,27(1):183-189. DOI:10.18307/2015.0121 |
| CHEN Tianfei,WANG Xusheng,HU Xiaonong,LU Huiting,GONG Yanping.Clines in salt lakes in the Badain Jaran Desert and their significances in indicating fresh groundwater discharge. J. Lake Sci.2015,27(1):183-189. DOI:10.18307/2015.0121 |
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| 摘要: |
| 位于阿拉善高原的巴丹吉林沙漠分布有大量盐湖.为揭示盐湖分层特征以及地下水对盐湖水体的影响,选取沙漠腹地的第二大盐湖——苏木巴润吉林,对9月份湖水的温度和电导率剖面进行了观测.结果表明,尽管所测盐湖宽深比大于90,还是存在温跃层.温跃层的矿化度(TDS)为60~160 g/L,靠近湖底的水体存在TDS低值异常区,形成化跃层,推测为地下淡水集中排泄所致.这种湖底泉在其它较浅的盐湖水体中也存在,说明深、浅层地下水对盐湖水分及盐分都有贡献.温跃层水温随深度的变化近似符合静止水体的热传导规律,并没有受到地下水排泄热量的显著影响.研究区盐湖跃层的季节性变化还有待进一步研究. |
| 关键词: 温度 矿化度 地下水 巴丹吉林沙漠 苏木巴润吉林 |
| DOI：10.18307/2015.0121 |
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| 基金项目:国家自然科学基金重大研究计划项目(91125024)和核设施退役及放射性废物治理项目(科工二司[2013]727号)联合资助 |
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| Clines in salt lakes in the Badain Jaran Desert and their significances in indicating fresh groundwater discharge |
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CHEN Tianfei1, WANG Xusheng2, HU Xiaonong1, LU Huiting2, GONG Yanping2
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1.Ministry of Education Key Laboratory of Groundwater Circulation and Evolution, China University of Geosciences, Beijing 100083, P. R. China;2.School of Water Resources and Environment, China University of Geosciences, Beijing 100083, P. R. China
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| Abstract: |
| A number of salt lakes exist in the Badain Jaran Desert that located in the Alxa Plateau, China. To reveal the stratification characteristics of salt lake water and the impacts of groundwater to the lakes, a survey of the depth-dependent temperature and electric conductivity in September was carried out in the second largest salt lake:the Sumu Barun Jaran. Thermocline is observed even though the lake has a big wide/deep ratio that is higher than 90. The salinity(TDS) varies from 60 to 160g/L, exhibits a relatively strong spatial variation. Abnormally low TDS zones exist near the lake bottom, forming chemocline in the themocline, which is considered to be influenced by concentrated discharge of fresh groundwater. This type of sub-lake springs have also been observed beneath shallow water bodies in other salt lakes, showing that both shallow and deep groundwater contribute water and salts into the lakes. Variation of temperature versus depth in the thermocline approximately satisfies the heat transfer in a static water body, is not significantly influenced by heat transfer from groundwater discharge. Further investigations are required for the seasonal variation patterns. |
| Key words: Temperature salinity groundwater Badain Jaran Desert Sumu Barun Jaran |
