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1.
《China Geology》2021,4(3):421-432
The Badain Jaran Desert is the third largest desert in China, covering an area of 50000 km2. It lies in Northwest China, where the arid and rainless natural environment has a great impact on the climate, environment, and human living conditions. Based on the results of 1∶250000 regional hydrogeological surveys and previous researches, this study systematically investigates the circulation characteristics and resource properties of the groundwater as well as the evolution of the climate and ecological environment since the Quaternary in the Badain Jaran Desert by means of geophysical exploration, hydrogeological drilling, hydrogeochemistry, and isotopic tracing. The results are as follows. (1) The groundwater in the Badain Jaran Desert is mainly recharged through the infiltration of local precipitation and has poor renewability. The groundwater recharge in the desert was calculated to be 1.8684×108 m3/a using the water balance method. (2) The Badain Jaran Desert has experienced four humid stages since the Quaternary, namely MIS 13-15, MIS 5, MIS 3, and the Early–Middle Holocene, but the climate in the desert has shown a trend towards aridity overall. The average annual temperature in the Badain Jaran Desert has significantly increased in the past 50 years. In detail, it has increased by about 2.5°C, with a higher rate in the south than in the north. Meanwhile, the precipitation amount has shown high spatial variability and the climate has shown a warming-drying trend in the past 50 years. (3) The lakes in the hinterland of the Badain Jaran Desert continuously shrank during 1973–2015. However, the vegetation communities maintained a highly natural distribution during 2000–2016, with the vegetation cover has increased overall. Accordingly, the Badain Jaran Desert did not show any notable expansion in that period. This study deepens the understanding of groundwater circulation and the climate and ecological evolution in the Badain Jaran Desert. It will provide a scientific basis for the rational exploitation of the groundwater resources and the ecological protection and restoration in the Badain Jaran Desert.© 2021 China Geology Editorial Office. 相似文献
2.
应用环境示踪剂探讨巴丹吉林沙漠及古日乃绿洲地下水补给 总被引：5，自引：0，他引：5
巴丹吉林沙漠位于我国西北部的阿拉善高原。近年来,许多中外学者应用天然水样及土壤水分的水化学、同位素等技术手段研究了该地区地下水补给及环境演化。基于这些研究,试图给出巴丹吉林沙漠和古日乃绿洲一个完整的二维地下水系统概念模型。巴丹吉林沙漠地下水在浅埋区和出露区蒸发,同时接受少量当地降水补给,其最终的排泄区是古日乃绿洲。巴丹吉林沙漠地下水垂向补给微弱,地下水很可能是更新世晚期至全新世早期周边的雅布赖山区降水径流及发源于祁连山的河流古河道补给的古水。在全新世中-晚期,地下水得到有限的降水补给,并且经受蒸发作用。随着千年尺度的气候转型,两千年以来,巴丹吉林沙漠干旱化加剧,正在经历地下水位下降、湖泊绿洲逐渐萎缩消亡的过程。 相似文献
3.
冲洪积物是古气候和古水文信息的重要记录,为了探讨巴丹吉林沙漠南缘地区全新世气候环境及其对区域地下水的影响,对沙漠南缘的水成沉积物进行了沉积学分析和光释光年代学测试,结果表明本文研究的两个沙漠南缘沉积剖面分别为全新世中期（6.6~5.2 ka）的间歇性河流沉积和暂时性流水形成的洪泛沉积.基于前人全新世中期沙漠中湖泊水位、气候环境重建,以及本文研究的冲洪积物的沉积特征与年代,表明在气候湿润的地质时期巴丹吉林沙漠南缘及山区的区域降水形成暂时性洪流和/或间歇性河流会对沙漠地区地下水进行补给. 相似文献
4.
J. S. Chen X. X. Sun W. Z. Gu H. B. Tan W. B. Rao H. Z. Dong X. Y. Liu Z. G. Su 《Geochemistry International》2012,50(5):455-465
Despite its extreme aridity, the Badain Jaran Desert is rich in groundwater. In the southeastern part of the desert, it is
characterized by coexistence of high megadunes and a great number of lakes. Deuterium and oxygen 18 isotope compositions as
well as hydrochemistry of groundwater, lake water, soil water and river water were investigated in detail to gain an insight
into their relationships and the origin of the ground-water. The results show that the groundwater and the lake water are
genetically related, but unrelated to local precipitation and the leakage of Heine River at northern slope of Qilian mountain.
δD and δ18O values of deep soil water (lower than 40 cm) and groundwater plot on the same evaporation line E11, which shows that they
have the same recharge source. The point of intersection between E11 and LMWL suggests that the groundwater originates from
the water resource which has a weighted mean value that is lighter by some 6‰ δ18O than the local precipitation in Badain Jaran Desert. 3H data of water samples shows that the groundwater in Badain Jaran Desert originates from the water recharged after the nuclear
test. The deep fault zone underground maybe the water circulation channel based on Helium analysis of groundwater. The result
has guiding significance to rational exploitation and utilization of the local groundwater. 相似文献
5.
本文阐述了巴丹吉林沙漠丘间地湖泊及其周围浅层地下水的水化学特征。在研究地区湖泊中的TDS变化范围较大,介于1.2g/L和398.2g/L之间。微咸湖泊属于Na(Ca)(Mg)Cl(SO4)(HCO3)类型,而含盐量高的湖泊则属于Na(K)Cl(CO3)(SO4)类型。文章根据同位素分析结果,提出了浅层地下水年龄都较年轻的观点。结合对古湖岸地貌与沉积的研究,文章还指出巴丹吉林沙漠地区湖泊在全新世发生过明显变化,湖水矿化度的增高和水域面积的快速萎缩是由于全新世中期以来出现的干旱化所造成的。 相似文献
6.
Conceptual model of recharge to southeastern Badain Jaran Desert groundwater and lakes from environmental tracers 总被引：14，自引：0，他引：14
John B Gates W Mike Edmunds W George Darling Jinzhu Ma Zhonghe Pang Adam A Young 《Applied Geochemistry》2008,23(12):3519-3534
Sources of groundwater recharge to the Badain Jaran Desert in China have been investigated using geochemical and isotopic techniques. Stable isotope compositions (δ18O and δ2H) of shallow groundwater and surface water from oasis lakes evolve from a starting composition considerably depleted compared to local unsaturated zone moisture, confirming inferences from chloride mass balance that direct infiltration of precipitation is not a volumetrically important source of recharge to the shallow aquifer in the study area. Shallow phreatic and deeper confined groundwater bodies appear unconnected based on chemical composition and radiocarbon activities. Hydrogeologic evidence points toward a bordering mountain range (Yabulai) as a likely recharge zone, which is consistent with tracer results. A mean residence time in the range of 1–2 ka for the desert’s southeastern margin is inferred from radiocarbon. These results reveal that some replenishment to the desert aquifer is occurring but at a rate much lower than previously suggested, which is relevant for water resources planning in this ecologically sensitive area. 相似文献
7.
8.
巴丹吉林沙漠以湖泊众多和沙山高大而闻名于世.到目前为止, 关于湖泊和沙山的成因问题尚存在不同的观点.实际上, 巴丹吉林沙漠湖泊和沙山的形成与该地区地下水的循环交替问题直接相关.参照前人研究成果, 结合开展的巴丹吉林沙漠水文地质调查, 探讨了湖泊和沙山的形成问题, 初步认为巴丹吉林沙漠湖泊主要接受来自东部雅布赖山区区域地下水侧向补给和沙山地下水补给而形成; 高大沙山的形成与降水和地下水关系密切; 高大沙山与湖泊的形成和共存关系是先有沙山, 而后才形成湖泊, 沙山是形成巴丹吉林沙漠湖泊的必备条件. 相似文献
9.
10.
Chloride and the environmental isotopes as the indicators of the groundwater recharge in the Gobi Desert,northwest China 总被引：5，自引：0，他引：5
The long term recharge in Gobi Desert from Hexi Corridor to Inner Mongolia Plateau was estimated to be 1 mm year−1 by using the chloride mass balance method from one unsaturated zone profile, which shows that no effective modern recharge
is taking place. A good rainfall database from Zhangye provides definition of the stable isotopic composition of modern rainfall.
The signature of groundwater from the late Pleistocene differs markedly from that of the Holocene, shown clearly by the compositions
of −10.5‰ δ18O as compared with values of −7‰ at the present day. It is apparent that the groundwaters in the Minqin Basin, Ejina Basin
and feeding the lake system of the Badain Jaran are part of a regional flow network related to a wetter past climate as source
of recharge. The recharge source in the past and to a limited extent in the more arid conditions of the present day included
the foothills of the mountains of the Tibetan Plateau. The tritium age determinations accurate to the year are impossible
and of no meaning to groundwater studies. A tritium value in the groundwater means multiple recharge ages in this region. 相似文献
11.
Geochemical Information Indicating the Water Recharge to Lakes and Immovable Megadunes in the Badain Jaran Desert 总被引：1，自引：0，他引：1
CHEN Jiansheng ZHAO Xi SHENG Xuefeng Wang Jiyang GU Weizu and CHEN Liang State Key Laboratory of Hydrology-Water Resources Hydraulic Engineering Hohai University Nanjing Jiangsu E-mail: jschen@hhu.edu.cn Institute of Isotope Hydrology Research Hohai University Nanjing Jiangsu Institute of Geology Geophysics Chinese Academy of Sciences Beijing 《《地质学报》英文版》2005,79(4):540-546
1 Introduction The Badain Jaran Desert, located in western Inner Mongolia, China, has a unique landscape containing 144 lakes (72 of which are still watery) with a total water area of about 23 km2, and the world’s highest stationary sand dunes with a height between 200 m and 500 m. Much attention has been paid to the water recharge of the desert in the past decade. Investigations on the resources of water system there have been performed continuously since the early 1990s, which lead to th… 相似文献
12.
Hg污染具有全球性,人类活动较少地区的湖泊沉积物对长距离输入的大气沉降Hg变化敏感。巴丹吉林沙漠中发育了约142个沙漠丘间湖泊,是研究大气沉降Hg记 录的理想材料。选择巴丹吉林沙漠东南部的宝日陶勒盖湖泊进行湖泊钻探,结合210Pbuns和137Cs核素测年及THg沉积通量计算,重建了400年来巴丹吉林沙漠湖泊的THg沉积记录,并探讨了影响沙漠湖泊THg沉积的影响因素,评估了自然背景和人类活动的影响。结果表明：(1)沉积物中THg含量分布范围为1.5~17.5 ng/g,富集系数和沉积通量的分布范围分别为0.3~4.5和2.9~38.9 μg/(cm2·a)。 THg含量、富集系数和沉积通量均表现为在岩心上部近几十年富集。(2)近400年来,湖泊沉积物中背景THg(THg岩石风化)通量变化相对稳定,主要受控于附近物源供给和区域风沙活动。大气沉降THg(THg 大气)通量自20世纪30年代以来呈逐渐增加的趋势,很大程度上反映了近几十年来人为源大气沉降THg的增加。但20世纪30年代以来岩心局部的大气沉降THg通量的峰值可能还受全球变暖和湖泊生产力增加 的影响,而20世纪30年代之前出现的峰值可能与“小冰期”冷期强烈的区域风沙活动有关。巴丹吉林沙漠湖泊400年来的THg大气沉积通量变化与全球Hg产量和冰心中的大气Hg含量变化记录一致,是沙漠 地区大气沉降THg的可信纪录。 相似文献
13.
Landscape evolution of the Ulan Buh Desert in northern China during the late Quaternary 总被引：1，自引：0，他引：1
《Quaternary Research》2014,81(3):476-487
The evolution of arid environments in northern China was a major environmental change during the Quaternary. Here we present the dating and environmental proxy results from a 35 m long core (A-WL10ZK-1) collected from the Ulan Buh Desert (UBD), along with supplemental data from four other cores. The UBD is one of the main desert dune fields in China and our results indicate the UBD has undergone complex evolution during the late Quaternary. Most of the present UBD was covered by a Jilantai-Hetao Mega-paleolake lasting until ~ 90 ka ago. A sandy desert environment prevailed throughout the UBD during the last glacial period and early Holocene. A wetland environment characterized by the formation of numerous interdunal ponds in the northern UBD occurred at ~ 8–7 ka, although a dune field persisted in the southern UBD. The modern UBD landscape formed after these wetlands dried up. During the last 2000 years, eolian sand from the Badain Jaran Desert has invaded the northern UBD, while farming and overgrazing resulted in the formation of the eastern UBD. We suggest that the formation of UBD landforms is related to the disintegration of the megalake Jilantai-Hetao and to summer monsoon changes during the last glaciation and Holocene. 相似文献
14.
黑河下游额济纳地区的环境演变 总被引：51，自引：2，他引：51
通过对水系变迁的分析,勾画了黑河下游额济纳地区环境变化的大体框架。黑河下游额济纳地区的环境变迁,演绎了西北干旱地区普遍存在的水系溯源退缩过程。在地质历史时期,这种溯源退缩主要原因是地质运动和气候变化,而近代、现代人类不合理的水土资源开发活动加速了河流水系的溯源退缩,并在一定程度上超过了自然因素的作用。巴丹吉林沙漠曾经是黑河下游的冲积湖积平原。那么如果绿洲消失,额济纳三角洲就有可能再现巴丹吉林沙漠的形成过程,形成新的"额济纳沙漠"。在第四纪早期,额济纳盆地存在两个水流系统,且气候环境较为温暖潮湿;随后两个水流系统逐渐合并,区域气候亦有变干变暖的趋势;至第四纪晚期,气候更加干旱,现代水文网定型。东西居延海不是黑河流域的终端湖,在地质历史上属于黑河流域下游的河道湖。随着黑河水系不断地溯源萎缩,东西居延海及居延泽也存在着一个逐步缩小的过程,并在近现代演变为尾闾湖。显然,东西居延海作为尾闾湖只是一个很短暂的时期。 相似文献
15.
本文根据实地野外观测和前人的研究,对我国西北干旱地区约30kaB.P.时的环境特征进行了综合分析.选用的古环境指标主要来源于风成沉积、湖泊沉积及河流沉积,年代主要依靠14C测年.依据巴丹吉林沙漠沙丘上的钙质胶结层、植物残体、塔克拉玛干沙漠河流沉积以及巴丹吉林沙漠腹地及其西北缘的高湖面,认为在30kaB.P.前后,我国西北干旱地区雨量较高,气候较湿润.柴达木盆地、腾格里沙漠西部、古尔班通古特沙漠西部及内蒙古地区湖泊同期的高湖面也支持这一观点. 相似文献
16.
Groundwater and lake evolution in the Badain Jaran Desert ecosystem, Inner Mongolia 总被引：17，自引：0，他引：17
The amount and timing of aquifer recharge and the evolution of lakes and groundwater in the south-eastern Badain Jaran desert of Inner Mongolia, with high megadunes, has been investigated using stable isotopes and hydrochemistry. Unsaturated zone moisture profiles down to 22 m 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 m south to the Yabulai Mountains. 相似文献
17.
同位素指示的巴丹吉林沙漠南缘地下水补给来源 总被引：14，自引：0，他引：14
通过恢复巴丹吉林沙漠及其周边地区大气降水氚值，并结合区域稳定同位素组合特征，揭示了区域地下水氚年龄的多解性与地下水稳定同位素的温度效应。恢复的1963年核试验期氚高峰值达到2 100 TU，进入90年代平均为60 TU。1960年以来降水补给的地下水氚值都应大于15 TU，而1963年的高峰氚衰变至今应在200 TU左右。地下水实测氚值较低，表明由现代少量降水补给的地下水与大量的古水进行了混合。影响降水中δ18O和δ2H分布的主要影响因子是月平均空气温度，对δ18O与δ2H的影响权重分别占到59.9%和57.0%。巴丹吉林沙漠及其周边地区地下水较低的稳定同位素组成表明，其补给主要是晚更新世较冷环境下形成的，来源于东南部的雅布赖山区，部分浅层地下水接受现代降水与河流的补给。
相似文献
18.
Analyzing the differences of brackish-water in the Badain Lake by geophysical exploration method 
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下载免费PDF全文 BadainJ aran Desert of Inner Mongolia is arid and rainless all the year around,with much more evaporation than rainfall.But the special groundwater recharge mechanism contributes to the generation of several lakes of different sizes that have never not dried up for years,among which there are many freshwater lakes.As the research object in this paper,East Badain Lake and West Badain Lake in the southeast of the desert,which are less than 50m away from each other,show the considerable difference in mineralization.In fact,one is a freshwater lake,but the other is a brackish-water lake.Considering the underground aquifer structure of BadainJ aran Desert and the special formation structure the particularity of the stratigraphic structure around Badain Lake,the author uses AMT(audio magneto telluric)method and ultra-high density resistivity method to analyze the difference in mineralization of East Badain Lake and West Badain Lake from the perspective of geophysical prospecting methods. 相似文献
19.
Estimating groundwater recharge in a cold desert environment in northern China using chloride 总被引：4，自引：0，他引：4
Understanding sources and rates of recharge to the Badain Jaran Desert in northern China is important for assessing sustainability of the area’s oasis lake ecosystem and its water resources in general. For this purpose, direct recharge was investigated with the chloride mass balance method for 18 unsaturated zone profiles (6–16 m depth). Spatial variability is low across the area (range in mean Cl in profiles: 62–164 mg/L Cl), largely attributable to the uniformity of sandy unsaturated zone conditions. No strong correlations between environmental factors of profile locations and recharge rates were found, though a weak relationship between recharge and vegetation density was suggested. The study area’s complex dune morphology appears to have no measurable impact on recharge variability. Mean estimated diffuse recharge is 1.4 mm/year (1.0–3.6 mm/year for 95% confidence level), approximately 1.7% of mean annual precipitation. Temporal fluctuations in recharge due to climate variability are apparent and there is good correspondence in temporal trends over a time span of 200–300 years. Water balance considerations indicate that direct recharge is insufficient to support the numerous perennial lakes in the study area, suggesting that diffuse recharge presently plays a minor role in the overall water balance of the desert’s shallow Quaternary aquifer. 相似文献
20.
中国北方风沙沉积物气候代用指标对比研究 总被引：2，自引：0，他引：2
在浑善达克沙地和巴丹吉林沙漠各选择近NS走向的大断面采集表层样品,用筛析法对样品进行粒度分析,用Eijkelkamp碳酸钙测定仪测定其碳酸钙含量。两地沙质沉积物的粒度参数对比结果显示,巴丹吉林沙漠沙总体上比浑善达克沙地沙粗,分选性比浑善达克沙地沙好,同时在粒度分布频率曲线上表现出明显的双峰,这应与其地处冬夏季风交替地带、冬季风和夏季风搬运营力上的差别有关。巴丹吉林沙漠和浑善达克沙地沙质沉积物粒度参数上的差别反映了两地不同的风动力条件和下垫面性质。浑善达克沙地的沙粒较细在一定程度上也与该地区较湿润条件下的成土作用有关。气候差异应是导致两地沙质沉积物粒度参数区别的主导因素。碳酸钙测量结果说明,浑善达克沙地的碳酸钙含量明显低于巴丹吉林沙漠。巴丹吉林沙漠沙的碳酸钙含量从北往南呈增加趋势,与该地区年降水量的南北方向变化相一致。从对这两个地区沙质沉积物的碳酸钙含量对比中可以看出,即使在干旱背景下,当多年平均降雨量达到一定临界值时,地表碳酸钙含量将达到一最大值,随后则呈降低趋势 相似文献