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引用本文:崔玉环,王杰,刘友存,郝泷,周婷.长江下游沿江升金湖河湖过渡带地下水来源及水质影响因素分析.湖泊科学,2021,33(5):1448-1457. DOI:10.18307/2021.0512
Cui Yuhuan,Wang Jie,Liu Youcun,Hao Shuang,Zhou Ting.Groundwater sources and the influencing factors on water quality in the river-lake transition zone of Lake Shengjin, lower reaches of the Yangtze River*. J. Lake Sci.2021,33(5):1448-1457. DOI:10.18307/2021.0512
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长江下游沿江升金湖河湖过渡带地下水来源及水质影响因素分析
崔玉环1, 王杰2, 刘友存3, 郝泷1, 周婷4
1.安徽农业大学理学院, 合肥 230036;2.安徽大学资源与环境工程学院, 合肥 230039;3.嘉应学院地理科学与旅游学院, 梅州 514015;4.安徽农业大学工学院, 合肥 230036
摘要:
为探究河湖过渡带地下水来源及其水质影响因素,本文分析了不同水体氢氧同位素的分布特征,确定地下水的补给来源,而后采用贝叶斯混合模型(MixSIAR)定量解析不同补给源对地下水的贡献率,并计算混合水源对地下水酸碱度(pH)、电导率(Cond)和总溶解固体(TDS)的贡献量,探究水源混合对地下水水质的影响.研究发现:近长江和湖岸的地下水同位素特征与长江水、湖水接近,其水力联系密切,而中部地下水同位素特征与河水接近,受河水补给明显;河水对地下水的贡献率最大,约为47%,降水贡献率约为20%,湖水和长江水的贡献率分别约为16%和17%;混合水源对pH的贡献率接近100%,对Cond的贡献率约为70%,而对TDS的贡献率很小.此外,生活污水、农业污染等外源输入也会导致地下水pH下降,Cond和TDS明显升高.
关键词:  地表-地下水转换  氢氧同位素  MixSAIR模型  水源混合  河湖过渡带  升金湖
DOI:10.18307/2021.0512
分类号:
基金项目:国家自然科学基金项目(41401022,41861002,41801332)、安徽高校自然科学研究项目(KJ2019A0045)和安徽省自然科学基金项目(2008085ME158)联合资助.
Groundwater sources and the influencing factors on water quality in the river-lake transition zone of Lake Shengjin, lower reaches of the Yangtze River*
Cui Yuhuan1, Wang Jie2, Liu Youcun3, Hao Shuang1, Zhou Ting4
1.School of Science, Anhui Agricultural University, Hefei 230036, P. R. China;2.College of Resources and Environmental Engineering, Anhui University, Hefei 230039, P. R. China;3.School of Geography Science and Tourism, Jiaying University, Meizhou 514015, P. R. China;4.School of Engineering, Anhui Agricultural University, Hefei 230036, P. R. China
Abstract:
The distribution characteristics of δ18O and δD in precipitation, surface water and groundwater are analyzed, and the potential recharge sources of groundwater are determined. Then the MixSIAR model is used to calculate the contribution rate of different recharge sources to groundwater quantitatively, and the influence of water source mixing on groundwater's quality is also analyzed. The results show that the characteristics of δ18O, δD in groundwater near the Yangtze River and the lake are similar to those in the Yangtze River and lake, indicating that a close hydraulic connection exists. While δ18O, δD values in groundwater located in the middle region are similar to those in rivers, indicating that groundwater is mainly recharged by rivers. The contribute ratio of the river to groundwater is the largest, about 47%, that of precipitation is about 20%, lake and the Yangtze River are about 16% and 17%, respectively. The contribution rate of the mixed water source to the pH of the groundwater is close to 100%. And the contribution rate of the mixed water source to conductivity is about 70%, contributes the conductivity value in most of the groundwater samples, but only contributes a small part of the total dissolved solids value.
Key words:  Surface water-groundwater interaction  hydrogen and oxygen isotopes  MixSIAR model  water source mixing  the river-lake transition zone  Lake Shengjin
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