Identify Groundwater Recharge Characteristics and Environmental Implications in Gonghe Basin Using Environmental Isotopes in Gonghe Basin
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摘要: 共和盆地地处黄河流域生态保护“一带五区多点”空间布局的水土保持区，地下水是盆地的主要供水水源，也是维持盆地脆弱生态系统的关键因子。针对该区域地下水补给路径不清、深层与浅层地下水相互作用机理认识不够深入的问题，笔者利用氢、氧同位素与14C同位素，探讨了区域地下水补给机理及其对生态环境的指示作用。研究结果表明，盆地地下水补给源主要为哇洪山和青海南山山区河流侧向入渗补给；潜水主要为1952年以后降雨入渗补给，循环交替较快。承压水14C年龄最高达19 384.7 a，盆地西部边界和东部排泄区地下水δ18O和δD特征相似，14C测年年龄相近，其补给来源主要为形成于距今10 000~60 000 a冰期时古水，反映共和盆地与西部茶卡盆地没有明显的水力联系。中部承压水受山区降雨侧向入渗和沙珠玉河入渗补给，地下水年龄较盆地西部边界和东部排泄区年轻。该研究揭示了共和盆地地表水、潜水和承压水之间的补给-排泄相互转化关系，对盆地水资源开发和生态环境保护具有重要意义。Abstract: Gonghe basin is located in the soil and water conservation zone of the Yellow river basin ecological reserve. Groundwater is the main water supply source and also the key factor for maintaining the fragile ecosystem in this basin. However, the path of regional groundwater recharge and the mechanism of deep and shallow groundwater interaction are still unclear. Using hydrogen, oxygen and 14C isotopes, the mechanism of regional groundwater recharge and its indicative effect on ecological environment are discussed in this paper. Results show that lateral infiltration recharge of rivers from Wahong Mountain and Qinghai South Mountain is the main groundwater recharge. The recharge of unconfined groundwater is mainly from infiltration of rainfall after the year 1952 with rapid cyclic alternation and the 14C age of the confined groundwater is up to 19384.7a.The groundwater characteristics of δ18O, δD and the 14C age are similar both in the western boundary of the basin and the eastern drainage area, and its recharge source is mainly from ancient water formed during the ice age of 10 000-60 000a ago, which reflecting that there is no obvious hydraulic connection between the Gonghe Basin and the western Chaka Basin. The age of the confined groundwater in the middle of the basin is younger than that in the western boundary and the eastern drainage area. For the middle part of the basin, rainfall and Shazhuyu river infiltration are the main recharge. This study reveals the mutual transformation of recharge-discharge among surface water, unconfined groundwater and confined groundwater in Gonghe basin and is of significance for developing and managing groundwater in this area.
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Key words:
- isotopes /
- groundwater age /
- groundwater circulation /
- Gonghe basin
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崔亚莉, 邵景力, 韩双平.西北地区地下水的地质生态环境调节作用研究[J].地学前缘, 2001, 8(1):191-196.
CUI Yali, SHAO Jingli, HAN Shuangping. Ecological environment adjustment by groundwater in Northwest China[J]. Earth Science Frontiers, 2001, 8(1):191-196.
汤奇成, 张捷斌.西北干旱地区水资源与生态环境保护[J].地理科学进展, 2001, 20(3):227-233.
TANG Qicheng, ZHANG Jiebin. Water Resources and Eco-environment Protection in the Arid Regions in Northwest of China[J]. Progress in Geography, 2001, 20(3):227-233.
王晓玮, 邵景力, 王卓然, 等.西北地区地下水水量-水位双控指标确定研究——以民勤盆地为例[J].水文地质工程地质, 2020, 47(2):17-24.
WANG Xiaowei, SHAO Jingli, WANG Zhuoran, et al. A study of the determination of indicators of dual control of groundwater abstraction amount and water table in northwest China:a case study of the Minqin Basin[J]. Hydrogeology and Engineering Geology, 2020, 47(2):17-24.
沈振荣.水资源科学实验与研究——大气水、地表水、土壤水、地下水相互转化关系[M].北京:中国科学科技出版社, 1992.
SHEN Zhenrong. Water resources scientific experiment and research:Atmospheric, surface, soil and ground water interactions[M]. Beijing:Science and Technology of China Press, 1992.
权国苍.青海省共和盆地南缘山前平原地下水资源研究[D].北京:中国地质大学(北京), 2015.
QUAN Guocang.Groundwater Resources Study at the southern margin in the piedmont of Gonghe west basin Qinghai province[D]. Beijing:China University of Geosciences, Beijing, 2015.
侯兆云.基于流体渗流-化学(同位素)耦合模拟的共和-贵德地热储层特征分析[D].吉林:吉林大学, 2019.
HOU Zhaoyun.Characterizing the geothermal system in the Gonghe Guide Basin by coupled fluid-heat-chemical (isotope) transport modeling[D].Jinlin:Jilin University, 2019.
马月花, 唐保春, 苏生云, 等.青海共和盆地地热流体地球化学特征及热储水-岩相互作用过程[J].地学前缘, 2020, 27(1):123-133.
MA Yuehua, TANG Baochun, SU Shengyun, et al. Geochemical characteristics of geothermal fluids and water-rock interaction in geothermal reservoirs in and around the Gonghe Basin, Qinghai Province[J]. Earth Science Frontiers, 2020, 27(1):123-133.
李永革.青海省共和盆地恰卜恰地区地下热水水文地球化学特征及成因分析[D].抚州:东华理工大学, 2016.
LI Yongge. Hydrogeochemical Characteristics and its Origin Analysis of Geothermal water in the Qiabuqia Area, Gonghe Basin, Qinghai Province[D].Fuzhou:East China University of Technology, 2016.
朱贵麟, 张林友, 李旭峰, 等.青海共和盆地地下水演化特征及成因机制[J].人民黄河, 2021, 51(S2):36-39+75.
ZHU Guilin, ZHANG Linyou, LI Xufeng, et al. Evolution characteristics and genetic mechanism of groundwater in Gonghe basin, Qinghai Province[J].Yellow River, 2021, 51(S2):36-39+75.
黄小琴, 柳青, 薛忠岐.宁夏固原地区地下水同位素特征研究[J].干旱区资源与环境, 2014, 28(2):143-148.
HUANG Xiaoqin, LIU Qing, XUE Zhongqi. The characteristics of groundwater isotopes in upper reach plain of Qingshui River, Ningxia[J].Journal of Arid Land Resources and Environment, 2014, 28(2):143-148.
张宗祜, 沈照理, 薛禹群, 等.华北平原地下水环境演化[M].北京:地质出版社, 2000.
ZHANG Zonghu, SHEN Zhaoli, XUE Yuqun, et al. Evolution of groundwater environment of the Northern China Great Plain[M]. Beijing:Geological Publishing House, 2000.
甄志磊, 李畅游, 李文宝, 等.内蒙古达里诺尔湖流域地表水和地下水环境同位素特征及补给关系[J].湖泊科学, 2014, 26(6):916-922.
ZHEN Zhilei, LI Changyou, LI Wenbao, et al. Characteristics of environmental isotopes of surface water and groundwater and their recharge relationships in Lake Dali basin[J]. Journal of Lake Sciences, 2014, 26(6):916-922.
马洪云, 李成柱, 王化齐, 等.银川盆地水体氢氧稳定同位素特征分析[J].西北地质, 2019, 52(2):218-226.
MA Hongyun, LI Chengzhu, WANG Huaqi, et al. Hydrogen and Oxygen Isotopic Compositions of Water Bodies at Yinchuan Basin, China[J]. Northwestern Geology, 2019, 52(2):218-226.
文冬光.用环境同位素论区域地下水资源属性[J].地球科学:中国地质大学学报, 2002, 27(2):141-147.
WEN Dongguang. Groundwater Resources Attribute Based on Environmental Isotopes[J].Journal of Earth Science, 2002, 27(2):141-147.
卫文, 陈宗宇, 赵红梅, 等.河北平原第四系承压水4He与14C测年对比[J].吉林大学学报:地球科学版, 2011, 41(4):1144-1150.
WEI Wen, CHEN Congyu, ZHAO Hongmei, et al. Comparison of 4He and 14C Dating of Groundwater from Quaternary Confined Aquifers in Hebei Plain[J]. Journal of Jilin University(Earth Science Edition), 2011, 41(4):1144-1150.
顾慰祖, 庞忠和, 王全九, 等.同位素水文学[M].北京:科学出版社, 2001.
GU Weizu, PANG Zhonghe, WANG Quanjiu, et al. Isotope Hydrology[M].Beijing:Science Press, 2001.
吴华武, 李小雁, 赵国琴, 等.青海湖流域降水和河水中δ18O和δD变化特征[J].自然资源学报, 2014, 29(9):1552-1564.
WU Huanwu, LI Xiaoyan, ZHAO Guoqin, et al. The Variation Characteristics of δ18O and δD in Precipitation and River Water, Qinghai Lake Basin[J].Journal of Natural Resources, 2014, 29(9):1552-1564.
黄麒, 梁青生.青海湖地区氚的分布特征[J].核技术, 1989, 12(11):679-683.
HUANG Qi, LIANG Qingsheng. Distribution Characteristics of Tritium in Qinghai Lake[J].Nuclear Technique, 1989, 12(11):679-683.
崔亚莉, 刘峰, 郝奇琛, 等.诺木洪冲洪积扇地下水氢氧同位素特征及更新能力研究[J].水文地质工程地质, 2015, 42(6):1-7.
CUI Yali, LIU Feng, HAO Qichen, et al. Characteristics of hydrogen and oxygen isotopes and renewability of groundwater in the Nuomuhong alluvial fan[J].Hydrogeology and Engineering Geology, 2015, 42(6):1-7.
Mahlknecht J, Schneider J F, Merkel B J, et al. Groundwater recharge in a sedimentary basin in semi-arid Mexico[J]. Hydrogeology Journal, 2004, 12:511-530.
Duzgoren Aydin N S, Aydin A, Malpas J.Re-assessment of chemical weathering indices:case study on pyroclastic rocks of Hong Kong[J]. Engineering Geology, 2002, 63:99-119.
RMokrik J, Maeika A, Baublyt, et al.The groundwater age in the Middle-Upper Devonian aquifer system. Lithuania[J]. Hydrogeology Journal, 2009, 17:871-889.
Gillon M, Barbecot F, Gibert E, et al.Open to closed system transition traced through the TDIC isotopic signature at the aquifer recharge stage, implications for groundwater 14C dating[J].Geochimica et Cosmochimica Acta, 2009, 73:6488-6501.
Craig H.Isotopic variations with meteoric water[J].Science, 1961, 133:1702-1703.
Tamers MA.Validity of radiocarbon dates on groundwater[J].Geophysical Survey, 1975, 2(2):217-239.
Ozanski K.Deuterium and oxygen-18 in European ground-water-links to atmospheric circulation in the past[J].Chemical Geology:Isotope Geosciences Section, 1985, 52:349-363.
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