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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.
Recharge to the inter-dune lakes and Holocene climatic changes in the Badain Jaran Desert, western China 总被引：8，自引：0，他引：8
We present new estimates on evaporation and groundwater recharge in the Badain Jaran Desert, western Inner Mongolia of northwestern China, based on a modified Penman Equation suitable for lakes in China. Geochemical data and water balance calculations suggest that local rainfall makes a significant contribution to groundwater recharge and that past lake-level variations in this desert environment should reflect palaeoclimatic changes. The chronology of lake-level change, established by radiocarbon and U-series disequilibrium dating methods, indicates high lake levels and a wetter climate beginning at ca. 10 ka and lasting until the late mid-Holocene in the Badain Jaran Desert. The greatest extension of lakes in the inter-dune depressions indicates that the water availability was greatest during the mid-Holocene. Relicts of Neolithic tools and pottery of Qijia Culture (2400-1900 BC) suggest relatively intensive human activity in the Badain Jaran Desert during the early and middle Holocene, supporting our interpretation of a less harsh environment. Wetter climates during the Holocene were likely triggered by an intensified East Asian summer monsoon associated with strong insolation. 相似文献
3.
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
4.
Hydrogeochemical and isotopic study of groundwater in the Habor Lake Basin of the Ordos Plateau,NW China 总被引：2，自引：2，他引：0
Lihe Yin Guangcai Hou Yan Dou Zhengping Tao Ying Li 《Environmental Earth Sciences》2011,64(6):1575-1584
Hydrogeochemistry and isotopes were used to understand the origin and geochemical evolution in the Habor Lake Basin, northwestern
China. Groundwater samples were taken, and the isotopic compositions δD, δ18O and major ions were analyzed. The groundwater can be divided into three types: the Quaternary groundwater, the shallow Cretaceous
groundwater and the deep Cretaceous groundwater. The groundwater chemistry is mainly controlled by the feldspar weathering
and dolomite weathering, the dissolution of Glauber’s salt, and cation exchange. Chemistry of lake water is mainly controlled
by evaporation and precipitation. The stable isotopes of oxygen and hydrogen in groundwater cluster along the local meteoric
water line, indicating that groundwater is of meteoric origin. Comparing with shallow groundwater, deep groundwater is depleted
in heavy isotopes indicating that deep groundwater was recharged during late Pleistocene and Holocene, during which the climate
was more wetter and colder than today. 相似文献
5.
Isotopic constraints on the origin of groundwater in the Ordos Basin of northern China 总被引：7，自引：2，他引：5
Jiansheng Chen Xiaoyan Liu Chiyuen Wang Wenbo Rao Hongbing Tan Haizhou Dong Xiaoxu Sun Yongsen Wang Zhiguo Su 《Environmental Earth Sciences》2012,66(2):505-517
Despite its extreme aridity, the Ordos Basin in northern China is rich in groundwater. Many artesian wells or springs with
large fluxes are utilized for drinking, irrigation and industrial production. In a search for the origin of the groundwater,
a detailed investigation of the stable isotopes of oxygen and hydrogen in the local precipitation, the river water, the springs,
the well water, as well as the soil water extracted from six soil profiles in the Ordos Basin, was carried out. The data show
that δD, δ18O and TDS values of the river water are similar to those of groundwater, while the TDS values of the soil water are about
ten times greater than those of groundwater. Furthermore, the mean isotopic compositions of the local precipitation are significantly
higher than those of river water and groundwater. Based on the chloride mass balance method, the estimated recharge rates
range from 5.2 to 17.2 mm/year, with a mean value of 10.5 mm/year. The results show that the main source of recharge of the
groundwater in the Ordos Basin is not the local precipitation, but must come from a region where the precipitation is characterized
by much lower δD and δ18O values. In addition, the groundwater in the Ordos Basin contains a component of mantle-derived 3He and crust-derived 4He suggesting that the groundwater may partly derive from flows through basement faults beneath the Ordos Basin. 相似文献
6.
7.
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
8.
Xin Liu Xianfang Song Yinghua Zhang Jun Xia Xuecheng Zhang Jingjie Yu Di Long Fadong Li Bing Zhang 《Environmental Earth Sciences》2011,63(5):1105-1118
Groundwater is of utmost significance to socio-economic development and ecological recovery for the Loess Plateau. However,
studies regarding the mechanism governing groundwater recharge over this area appear to be inadequate. This study is to examine
the spatio-temporal variations of δ2H and δ18O in precipitation and shallow groundwater. On the basis of this, the mechanisms governing shallow groundwater recharge were
explored. Precipitation and groundwater were sampled monthly from May to October during the period 2004–2006 at 13 sites in
the Chabagou Catchment (187 km2). In the Caopingxigou Experimental Watershed (0.1 km2), meteorological variables were observed and rainfall larger than 5 mm was sampled immediately after each rain event. Across
the area, 90% of the precipitation occurred from May to September primarily in the form of heavy rains or rainstorms with
great spatial variability. There were about 30 localized rains in each year. It was indicated that there existed notable seasonality
and pronounced spatial variability in precipitation isotopic compositions. Contributing factors and indications of isotopic
compositions, as well as their climatic indications such as monsoon intensities and mixing processes of water vapor, were
investigated. The δ2H–δ18O relation of groundwater was found to be δ2H = 3.22 × δ18O − 38.1, deviating from the local meteoric water line δ2H = 7.57 × δ18O + 3.9. The range of δ values in groundwater is shrunken to be 15–21% of that in individual precipitations, and groundwater in the middle reaches
shows a wider range of δ values. Isotopic results showed that groundwater originates from precipitation with hydrogen and oxygen isotopic compositions
being −69 and −9.7‰, respectively, and most groundwater experiences serious evaporation and adequate mixing with old water
during infiltration or percolation in the aerated zone. It was also founded that obvious fluctuations of isotopic compositions
in groundwater mainly appear in the middle reaches especially at sites that are close to valleys, suggesting varying sources
of groundwater from precipitation, precipitation runoff, isotopically enriched surface water and/or lateral recharge of adjacent
groundwater. 相似文献
9.
10.
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
11.
通过对巴丹吉林沙漠东南部湖水和南缘地区地下水离子化学成分及其环境同位素分析,初步探讨了沙漠地区湖水和地下水之间补给的关系。沙漠湖水的离子化学特征显示沙漠东南部湖泊的演化趋势:微咸湖-咸水湖-盐水湖。显著不同的盐度、CO32-和HCO3-含量以及地质资料都表明,沙漠北部较大的湖泊和东南部的湖泊被一地形上的褶皱隆起阻隔而形成了不同的地下水补给体系。环境同位素的分析结果表明,巴丹吉林沙漠东南部的湖泊和地下水与沙漠东南边缘地区的地下水有着相似的蒸发趋势,暗示南缘地区的地下水和沙漠东南部地区湖泊之间存在一定的联系。同其他干旱地区地下水的同位素结果进行对比显示,雅布赖地区和沙漠地区的地下水应该是埋深较浅的地下潜水。因本次研究结果不支持单一远源或者深层地下水补给的观点,故推断沙漠东南部地区以及南缘地区的地下水主要是当地雨量丰沛时期的降水及南缘低山降水下渗补给的。 相似文献
12.
1987～1995年对降水、黑河水和古日乃草原地下水作了定位观测,在巴丹吉林沙漠水文探险中采集了沙漠和戈壁地下水及湖水.降水同位素组成δD～δ18O与Craig线相同,但发现了地下水的δD～δ18D关系平行于降水线且有氘盈余为负且达-22‰的异常,其成因不明.由地表、地下水环境同位素组成,分析了黑河治理规划实施后可能对地下水资源产生的工程影响,它近期不会成为古日乃草原沙漠化进程的因素,但对额济纳绿洲的影响却不容忽视. 相似文献
13.
Fadong Li Xianfang Song Changyuan Tang Changming Liu Jingjie Yu Wanjun Zhang 《Environmental Geology》2007,53(3):687-696
The groundwater in headwater region is an important recharge source for the adjacent mountain-front plain. In order to reveal
the relationship among precipitation, soil water and groundwater, from June to September in 2004, stable isotopes (deuterium
and oxygen-18) in precipitation and soil waters at the depths of 10, 20, 30, 50, 70, 90, and 110 cm were analyzed at two sites
covered by black locust (Robinia Pseudoacia L.) (Site A) and grass predominated by Themeda triandra (T. japonica (Willd.) Tanaka) and Bothriochloa ischaemum (B. ischaemum (L.) Keng) (Site B) in an experimental catchment at Taihang Mt., North China, respectively. The δ18O of precipitation in daily rain events shows large variations (−13.3 to −4.3‰) with a mean of 8.1‰. The δ18O and δ D of soil waters along profiles in two sites suggest that the influence of canopy cover was just up to 10 cm in top
soil water. The soil water moved over the zero flux plane at 70 cm in-depth is expected to escape the evaporative effect at
the end of September in both sites. The results show that the stable isotope, instead of tritium as tradition, can be used
to trace the soil water behaviors based on the movement of isotopic peak along the vertical profiles in this semi-arid and
semi-humid mountainous region. The infiltration depths of soil water in Taihang Mt. are 12 and 10 mm/day from June to September
in 2004 in Site A and Site B, respectively. Tracing by stable isotope, recharge fluxes of soil water to local groundwater
are of 3.8 and 3.2 mm/day in Site A and Site B, respectively. The results provide desirable information for assessment of
local groundwater resources.
An erratum to this article can be found at 相似文献
14.
The present work was conducted in the Sinai Peninsula (1) to identify the recharge and flow characteristics and to evaluate
the continuity of the Lower Cretaceous Nubian Sandstone aquifer; and (2) to provide information for the aquifer's rational
appraisal. Isotopic and hydrochemical compositions combined with the geological and hydrogeological settings were used for
this purpose.
A considerable depletion in isotopic content (oxygen-18 and deuterium) and low d-excess values exist in the studied groundwater,
reflecting the contribution of old meteoric water that recharged the aquifer in pluvial times. Modern recharge also occurs
from precipitation that falls on the aquifer outcrops. The wide scatter of the data points around the two meteoric lines,
the global meteoric water line (GMWL) and Mediterranean meteoric water line (MMWL), in the δ18O–δD diagram indicates considerable variation in recharge conditions (amount, altitude, temperature, air masses, distances
from catchment, overland flow, etc.). The isotopic composition in the El-Bruk area is minimum (18O=–9.53‰), very close to the average value of the Western Desert Nubian Sandstone (18O=–10‰), where the local structural and lithologic conditions retard groundwater flow and the main bulk of water becomes noncyclic.
The continuity of the aquifer in northern and central Sinai is evidenced by the isotopic similarity between samples taken
from above and below the central Sinai Ragabet El-Naam fault, the distribution of potentiometric head, and hydrogeological
cross sections.
The combination of isotopic composition in terms of 18O and chemical composition in terms of TDS and salt contents is the basis for separating the studied groundwater into groups
that reflect the recharge sources and isotopic and chemical modifications during flow.
Electronic Publication 相似文献
15.
巴丹吉林沙漠是世界上沙丘最高大的沙漠,其沙源研究对认识沙漠形成、高大沙山发育和防沙治沙工程有重要意义。石英是沙漠沉积物中常见的矿物,其氧同位素值可示踪物源。采集沙漠西北部、东部、东南部高大沙山、丘间低地与湖泊以及雅布赖山前的表层沉积物,测定了样品不同粒级的石英δ18O值。结果表明:①石英δ18O值随粒级减小有增大趋势,同一样品不同粒级石英δ18O值存在较大差异,相同粒级石英δ18O值也有变化。②石英δ18O值介于9.4‰~19.3‰,均值为13.3‰（n=55）;其中沙丘沙的石英δ18O值介于9.5‰~16.6‰,均值为12.9 ‰（n=39）;湖相沉积物的石英δ18O值介于9.4‰~19.3‰,均值为14.2‰（n=16）。③区域内,<16 μm粒级的石英δ18O值与16~64 μm、125~154 μm、200~250 μm、> 300 μm粒级的石英δ18O值都存在显著差异,但200~250 μm与 > 300 μm粒级的石英δ18O值没有显著差异;经区域对比,巴丹吉林沙漠 < 16 μm粒级的石英δ18O值与柴达木盆地沙漠、蒙古戈壁风成沉积物 < 16 μm石英δ18O值无显著差异,但巴丹吉林沙漠16~64 μm粒级的石英δ18O值与蒙古戈壁风成沉积物16~64 μm石英δ18O值存在显著差异;这似乎暗示研究区的细颗粒物质可能是远源的。巴丹吉林沙漠沉积物的石英δ18O值位于火成岩石英、砂岩和变质岩石英δ18O值分布阈值内,受区域地质条件、物源混合、粒级效应等因素的影响,砂粒级的石英δ18O值所指示的母岩成份特征与祁连山区岩石的岩性有较好吻合。 相似文献
16.
Shallow groundwater dynamics and origin of salinity at two sites in salinated and water-deficient region of North China Plain,China 总被引：5，自引：4，他引：1
Shiqin Wang Xianfang Song Qinxue Wang Guoqiang Xiao Zhimin Wang Xin Liu Peng Wang 《Environmental Earth Sciences》2012,66(3):729-739
Large salinated areas are distributed in the middle and east of the North China Plain (NCP), where the fresh water shortage is serious. In this study, two sites in Cangzhou (CZ) and Hengshui (HS) of Hebei Province were selected to study the dynamics of shallow groundwater level and salinity. Electrical conductivity (EC) of groundwater was combined with the isotope compositions of δ18O and δ2H to identify the origin of salinity. Results showed that the dynamics of groundwater level at both sites were mainly controlled by precipitation and evaporation. Soil texture and structure played a significant role in the dynamics of salinity. The summer precipitation diluted the EC of groundwater at the HS site with homogeneous soil of sand loam, suggesting the larger infiltration rate; however, it did not dilute the EC at the CZ site with heterogeneous soil of sand loam and silt loam, suggesting that the summer precipitation could not recharge the groundwater directly. In winter, the EC decreased rapidly due to the temperature gradient underground if the groundwater was above the threshold level (at least 3 m below the ground surface) after the rainy season. Isotopes of δ18O and δ2H showed that precipitation was the major recharge source for the groundwater at the two sites. The salt mainly comes from the dissolution of soil or rock at the CZ site. While, the evaporation effect was strong at the HS site leading to the increase of the salt concentration. 相似文献
17.
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
18.
Compositions of deuterium and 18O isotopes of 90 representative samples indicate that thermal groundwater in most parts of China is meteoric in origin. Latitude,
altitude, and continent effects have significant bearing on the values of δD and δ18O of the hot water samples. Oxygen-18 shift is not significant in most of the thermal groundwater, especially the hot water
of low-to-moderate temperature. Slight oxygen-18 shift is only found in some hot springs of high temperature in Tibet and
western Yunnan and in thermal groundwater of low-to-moderate temperature in the deep-seated carbonate aquifers in the northern
North China Plain (including the Tianjin area). Near-surface boiling may causes the shift of the former and the latter may
be attributed to exchange of oxygen-18 between water and carbonates in the geothermal systems of taphrogenic basin-type. Hot
springs in Tibet and western Sichuan have very low contents of δD and δ18O, possibly due to recharge of precipitation and snow-melting water of extremely depleted δD and δ18O values at high latitudes of several thousands of meters. 相似文献
19.
Barbara Vokal-Nemec Janina Szaran Andrzej Trembaczowski Stanislaw Halas Tadej Dolenec Sonja Lojen 《Aquatic Geochemistry》2006,12(3):199-220
Measurements were made of sulphur and oxygen isotope ratios of sulphate in some Slovenian rivers, lakes and tap waters. δ34S ranged from −0.2 to + 13.3‰, δ18O ranged from +4.9 to + 13.6‰, and the sulphate content varied from 0.8 to 41.4 mg/L. Rivers flowing from the Julian Alps
contain a very low amount of sulphate that is leached from a thin horizon of soil by rain. As confirmed by their low δ18O values, these sulphates do not enter the rivers directly in rain, but arise from biochemical cycling in the soil. The low
δ34S of this sulphate indicates that it originates from the oxidation of sedimentary sulphides. The evolution of sulphates along
the river course was investigated for the Sava and Ljubljanica rivers. The variations observed in sulphate from the waters
studied result from variations in the contribution of sulphates of different origin. Downstream the Sava River sulphate is
depleted in the heavy isotopes of both sulphur and oxygen, with δ-values gradually tending toward the δ-values of groundwater
sulphates in the watershed. In contrast, the δ-values of sulphate in the Ljubljanica River are almost constant and similar
to those of sulphate in local groundwater. Introduction of water from Italian and Slovenian mines was recorded in the Soča
River, where the lowest δ34S value of sulphate sulphur (−0.2‰) was observed. In addition, the influence of sulphate from the oxidation of sedimentary
sulphides was recorded in the Sotla River. No evidence was found for introduction of sulphate from factories. 相似文献
20.
Hsueh-Yu Lu Tsung-Ren Peng Tsung-Kwei Liu Chung-Ho Wang Chih-Chao Huang 《Environmental Geology》2006,50(6):885-898
This study was based on the analysis of isotopic compositions of hydrogen and oxygen in samples from precipitation, groundwater and stream water. In addition, parts of groundwater samples were dated by carbon-14 and tritium. These data are integrated to provide other views of the hydrologic cycle in the Hsinchu-Miaoli groundwater district. The groundwater district is principally composed of Pleistocene and Holocene aquifers. The Pleistocene aquifers are highly deformed by folding and faults into small sub-districts with areas of only tens of square kilometers. These aquifers are exclusively recharged by local precipitation. The Holocene aquifers cover narrow creek valleys, only tens of meters in thickness. The local meteoric water line (LMWL), constructed from rainfall samples in the Hsinchu Science Park, is described by the equation δD=8.02δ18O+10.16, which agrees with the global meteoric water line. In addition, the precipitation isotopic compositions can be categorized into two distinct end members: typhoon type and monsoon type. The groundwater isotopic compositions are perfectly located on an LMWL and can be considered a mixture of precipitations. Based on the mass balance of isotopic compositions of oxygen and hydrogen, infiltration is more active in the rainy season with depleted isotopic compositions. The amount of infiltration during May–September is roughly estimated to comprise at least 55% of the whole year’s recharge. The isotopic compositions of stream water are expressed by a regression equation: δD=7.61δ18O+9.62, which is similar to the LMWL. Although precipitation isotopic compositions are depleted during summer time, the isotopic compositions contrarily show an enriched trend in the upstream area. This is explained by the opposite altitude effect on isotopic compositions for typhoon-related precipitations. 相似文献