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题名: Groundwater and lake evolution in the Badain Jaran desert ecosystem, Inner Mongolia
作者: Ma, JZ(马金珠); Edmunds, WM
收录类别: SCIE
出版日期: 2006-11
刊名: HYDROGEOLOGY JOURNAL
卷号: 14, 期号:7, 页码:1231-1243
出版者: SPRINGER
出版地: NEW YORK
英文摘要: The amount and timing of aquifer recharge and the evolution of lakes and groundwater in the southeastern Badain Jaran desert of Inner Mongolia, with high megadunes, has been investigated using stable isotopes and hydrochemistry. Unsaturated zone moisture profiles down to 22 in have recorded recharge over 1185 years. Small but finite amounts of recharge are recorded with mean recharge rates of 0.95-1.33 mm year(-1), determined using a chloride mass balance technique. The unsaturated profile also acts as a unique archive of hydrological and climate change. Before 1300, it was relatively dry but distinct wet periods may be recognised during 1340-1450, 1500-1610 and 1710-1820. Since the mid 1800s, the climate shows a trend towards greater aridity. The interdune lakes are generally fresh but locally, hypersaline lakes are found in juxtaposition. This implies that in general, the lakes have low residence times and flow back into the dune system, but sedimentary obstruction locally prevents outflow and extreme evaporation occurs. The stable isotope records show that the lakes are fed by palaeowaters which on the basis of other proxy data must predate the Last Glacial Maximum. Their recharge source is problematic but most likely this derives from a diminishing water table extending some 30 in south to the Yabulai Mountains.
关键词: hydrochemistry ; groundwater recharge ; paleohydrology ; unsaturated zone ; Badain Jaran Desert
作者部门: Lanzhou Univ, Minist Educ, CAEP, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China ; Univ Oxford, Ctr Environm, Oxford Ctr Water Res, Oxford OX1 3QY, England
通讯作者: Ma, JZ (reprint author), Lanzhou Univ, Minist Educ, CAEP, Key Lab Western Chinas Environm Syst, 222 S Tianshui Rd, Lanzhou 730000, Peoples R China.
学科分类: Geology; Water Resources
文章类型: Article
语种: 英语
DOI: 10.1007/s10040-006-0045-0
ISSN号: 1431-2174
WOS记录号: WOS:000243104100011
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/119703
Appears in Collections:资源环境学院_期刊论文

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Ma, JZ,Edmunds, WM. Groundwater and lake evolution in the Badain Jaran desert ecosystem, Inner Mongolia[J]. HYDROGEOLOGY JOURNAL,2006,14(7):1231-1243.
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