| 青海湖沙柳河流域浅层地下水不同时期补给特征 |
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| 引用本文： | 杨羽帆,曹生奎,曹广超,雷义珍,刘英,兰垚.青海湖沙柳河流域浅层地下水不同时期补给特征[J].干旱区地理,2020,43(3):633-643. |
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| 作者姓名： | 杨羽帆 曹生奎 曹广超 雷义珍 刘英 兰垚 |
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| 基金项目： | 青海省自然科学基金项目(2018-ZJ-905)；青海省“高端创新人才千人计划”（青人才字［2016］11号）；青海省“135高层次人才培养工程”
资助 |
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| 摘 要： | 地下水稳定同位素组成的时空变化特征可以反映不同时期、不同区域地下水补给来源的差异。通过青海湖沙柳河流域浅层地下水氢氧稳定同位素组成的时空变化特征以及地下水、河水与降雨之间的补给关系的分析，结果显示：季风时期，地下水主要受降雨入渗和河流侧向补给为主，在补给过程中蒸发作用是影响地下水稳定同位素值的主要因素；非季风期，冰雪融水对低值区的地下水影响显著，同时降水的快速入渗则是该时期高值区地下水的主要补给方式之一。地下水同位素高值区，地下水与河水间补给作用较弱，补给时间超过5个月；地下水同位素低值区，地下水与河水补给关系较为密切，补给时间在1~4个月间。本文所得结论可初步反映干旱半干旱内陆流域地下水稳定同位素特征以及补给方式的基本规律，在一定程度上可为流域地下水及其他水体间的转换研究提供科学依据，并为地下水资源管理和水环境治理提供一定理论指导。
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| 关 键 词： | 浅层地下水 氢氧稳定同位素 地下水补给 青海湖 沙柳河流域 |
| 收稿时间： | 2019-08-10 |
Recharge characteristics of shallow groundwater in
different periods of Shaliu River Basin around the Qinghai Lake |
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| YANG Yu-fan,CAO Sheng-kui,CAO Guang-chao,LEI Yi-zhen,LIU Ying,LAN Yao.Recharge characteristics of shallow groundwater in
different periods of Shaliu River Basin around the Qinghai Lake[J].Arid Land Geography,2020,43(3):633-643. |
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| Authors: | YANG Yu-fan CAO Sheng-kui CAO Guang-chao LEI Yi-zhen LIU Ying LAN Yao |
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| Abstract: | The Shaliuhe River Basin is located in the territory
of Gangcha County,Qinghai Province,China and in the northern part of Qinghai
Lake.Located in the transition zone of westerlies and monsoons,the basin
experiences significant seasonal variations in precipitation,with approximately
65% of precipitation concentrated during the monsoon period.There are
relatively abundant groundwater resources in the Shaliuhe River Basin,mainly
including bedrock fissure water in the northern mountainous region of the
basin,phreatic water in gravel layers of piedmonts and intermontane plains,and
confined water in the downstream lakeside plains.From July to November 2017,the
author collected about 300 samples of shallow groundwater,spring water,glacier
snowmelt water,and river water in the middle and lower reaches of Shaliuhe River Basin.Spatio-temporal variation
characteristics of hydrogen and oxygen stable isotope composition of shallow
groundwater and the recharge relationship between groundwater and other water
bodies in different periods were studied in Shaliuhe River basin of Qinghai
Lake using GIS spatial interpolation method and stable isotope techniques.The
conclusions were drawn as follows:(1) during the monsoon period,groundwater is
mainly recharged by rainfall infiltration and lateral recharge of rivers,and
evaporation is the main factor affecting the stable isotope value of
groundwater.In the non-monsoon period,the glacier snowmelt water has a
significant impact on groundwater in the low-value area,and the rapid
infiltration of precipitation is one of the main recharge paths of groundwater
in the high value area.(2) in the high-value area of groundwater
isotope,the recharge between groundwater and river water is weak,and the
recharge time is more than 5 months.In the low-value area of groundwater
isotope,groundwater has a close supply relationship with river water,and the
supply time is from January to April.At present,there are few studies on
groundwater stable isotopes in China,especially in the Qinghai-Tibet Plateau
where there is a lack of seasonal difference in groundwater recharge
path.Therefore,the results of this study can preliminarily reflect the stable
isotope characteristics of groundwater and the basic law of recharge pattern in
the arid and semi arid inland basins to a certain
extent.The results also provide a scientific basis for the study of
conversion between groundwater and other
water bodies within the basin,and theoretical guidance for groundwater resource
management and water environment treatment. |
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| Keywords: | shallow groundwater hydrogen-oxygen stable isotope groundwater supply Qinghai Lake Shaliu River Basin |
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