Application of Geophysical and Hydrogeochemical Methods to the Protection of Drinking Groundwater in Karst Regions

To provide theoretical support for the protection of centralized drinking groundwater sources in karst areas, it is necessary to accurately identify the development of karst conduits and analyze the differences in hydrogeochemical characteristics of different karst systems. This provides a scientifi...
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Autor*in:	Kai Song [verfasserIn] Guangxu Yang [verfasserIn] Fei Wang [verfasserIn] Jian Liu [verfasserIn] Dan Liu [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	karst conduit systems drinking groundwater source hydrochemical process water–rock interaction

Übergeordnetes Werk:	In: International Journal of Environmental Research and Public Health - MDPI AG, 2005, 17(2020), 3627, p 3627
Übergeordnetes Werk:	volume:17 ; year:2020 ; number:3627, p 3627

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc Journal toc

DOI / URN:	10.3390/ijerph17103627

Katalog-ID:	DOAJ024860603

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520			\|a To provide theoretical support for the protection of centralized drinking groundwater sources in karst areas, it is necessary to accurately identify the development of karst conduits and analyze the differences in hydrogeochemical characteristics of different karst systems. This provides a scientific basis for the accurate designation of risk zones that may cause drinking groundwater pollution. In this study, a geophysical survey, hydrogeological chemical process analysis and optimized fuzzy cluster analysis were used to gradually improve the understanding of karst water systems. AMT and HDR methods were used to calibrate the resistivity around the water-filling karst conduits, which ranged from 39 to 100 Ω•m. A total of seven karst systems were identified, including four karst systems in the north of the study area, one karst system in the west and two karst systems in the south. Analysis of the hydrochemical data showed that HCO<sub<3</sub<-Ca and HCO<sub<3</sub<-Mg-Ca types accounted for 90% of all samples. The δD and δ<sup<18</sup<O values of their main conduits were −51.70‰ to −38.30‰ and −7.99‰ to −5.96‰, respectively. The optimized fuzzy clustering analysis method based on the weight of variables assigned by AHP more accurately verified karst water systems. Based on these findings, the drinking groundwater source risk zone was designated with an area of 33.90 km<sup<2</sup<, accounting for 34.5% of the study area. This study effectively improved the rationality and accuracy of the designation of drinking groundwater source risk zones in karst areas, and provided a scientific basis for the identification of karst water systems and decision-making of drinking groundwater source protection in karst areas.
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author	Kai Song
spellingShingle	Kai Song misc karst conduit systems misc drinking groundwater source misc hydrochemical process misc water–rock interaction misc Medicine misc R Application of Geophysical and Hydrogeochemical Methods to the Protection of Drinking Groundwater in Karst Regions
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topic_title	Application of Geophysical and Hydrogeochemical Methods to the Protection of Drinking Groundwater in Karst Regions karst conduit systems drinking groundwater source hydrochemical process water–rock interaction
topic	misc karst conduit systems misc drinking groundwater source misc hydrochemical process misc water–rock interaction misc Medicine misc R
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title	Application of Geophysical and Hydrogeochemical Methods to the Protection of Drinking Groundwater in Karst Regions
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title_full	Application of Geophysical and Hydrogeochemical Methods to the Protection of Drinking Groundwater in Karst Regions
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title_sort	application of geophysical and hydrogeochemical methods to the protection of drinking groundwater in karst regions
title_auth	Application of Geophysical and Hydrogeochemical Methods to the Protection of Drinking Groundwater in Karst Regions
abstract	To provide theoretical support for the protection of centralized drinking groundwater sources in karst areas, it is necessary to accurately identify the development of karst conduits and analyze the differences in hydrogeochemical characteristics of different karst systems. This provides a scientific basis for the accurate designation of risk zones that may cause drinking groundwater pollution. In this study, a geophysical survey, hydrogeological chemical process analysis and optimized fuzzy cluster analysis were used to gradually improve the understanding of karst water systems. AMT and HDR methods were used to calibrate the resistivity around the water-filling karst conduits, which ranged from 39 to 100 Ω•m. A total of seven karst systems were identified, including four karst systems in the north of the study area, one karst system in the west and two karst systems in the south. Analysis of the hydrochemical data showed that HCO<sub<3</sub<-Ca and HCO<sub<3</sub<-Mg-Ca types accounted for 90% of all samples. The δD and δ<sup<18</sup<O values of their main conduits were −51.70‰ to −38.30‰ and −7.99‰ to −5.96‰, respectively. The optimized fuzzy clustering analysis method based on the weight of variables assigned by AHP more accurately verified karst water systems. Based on these findings, the drinking groundwater source risk zone was designated with an area of 33.90 km<sup<2</sup<, accounting for 34.5% of the study area. This study effectively improved the rationality and accuracy of the designation of drinking groundwater source risk zones in karst areas, and provided a scientific basis for the identification of karst water systems and decision-making of drinking groundwater source protection in karst areas.
abstractGer	To provide theoretical support for the protection of centralized drinking groundwater sources in karst areas, it is necessary to accurately identify the development of karst conduits and analyze the differences in hydrogeochemical characteristics of different karst systems. This provides a scientific basis for the accurate designation of risk zones that may cause drinking groundwater pollution. In this study, a geophysical survey, hydrogeological chemical process analysis and optimized fuzzy cluster analysis were used to gradually improve the understanding of karst water systems. AMT and HDR methods were used to calibrate the resistivity around the water-filling karst conduits, which ranged from 39 to 100 Ω•m. A total of seven karst systems were identified, including four karst systems in the north of the study area, one karst system in the west and two karst systems in the south. Analysis of the hydrochemical data showed that HCO<sub<3</sub<-Ca and HCO<sub<3</sub<-Mg-Ca types accounted for 90% of all samples. The δD and δ<sup<18</sup<O values of their main conduits were −51.70‰ to −38.30‰ and −7.99‰ to −5.96‰, respectively. The optimized fuzzy clustering analysis method based on the weight of variables assigned by AHP more accurately verified karst water systems. Based on these findings, the drinking groundwater source risk zone was designated with an area of 33.90 km<sup<2</sup<, accounting for 34.5% of the study area. This study effectively improved the rationality and accuracy of the designation of drinking groundwater source risk zones in karst areas, and provided a scientific basis for the identification of karst water systems and decision-making of drinking groundwater source protection in karst areas.
abstract_unstemmed	To provide theoretical support for the protection of centralized drinking groundwater sources in karst areas, it is necessary to accurately identify the development of karst conduits and analyze the differences in hydrogeochemical characteristics of different karst systems. This provides a scientific basis for the accurate designation of risk zones that may cause drinking groundwater pollution. In this study, a geophysical survey, hydrogeological chemical process analysis and optimized fuzzy cluster analysis were used to gradually improve the understanding of karst water systems. AMT and HDR methods were used to calibrate the resistivity around the water-filling karst conduits, which ranged from 39 to 100 Ω•m. A total of seven karst systems were identified, including four karst systems in the north of the study area, one karst system in the west and two karst systems in the south. Analysis of the hydrochemical data showed that HCO<sub<3</sub<-Ca and HCO<sub<3</sub<-Mg-Ca types accounted for 90% of all samples. The δD and δ<sup<18</sup<O values of their main conduits were −51.70‰ to −38.30‰ and −7.99‰ to −5.96‰, respectively. The optimized fuzzy clustering analysis method based on the weight of variables assigned by AHP more accurately verified karst water systems. Based on these findings, the drinking groundwater source risk zone was designated with an area of 33.90 km<sup<2</sup<, accounting for 34.5% of the study area. This study effectively improved the rationality and accuracy of the designation of drinking groundwater source risk zones in karst areas, and provided a scientific basis for the identification of karst water systems and decision-making of drinking groundwater source protection in karst areas.
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title_short	Application of Geophysical and Hydrogeochemical Methods to the Protection of Drinking Groundwater in Karst Regions
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Application of Geophysical and Hydrogeochemical Methods to the Protection of Drinking Groundwater in Karst Regions

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