Hydrological and hydrochemical regime of a typical subterraneous river in a deep canyon karst area: A case study in the Santang underground river, Guizhou
The Pingzhai Reservoir, a water source project of the Central Guizhou Province hydro-junction project, is located in the deep canyon karst area of the Sancha river in the Guizhou Plateau. It is an important water conservancy infrastructure to ensure the safety of water resources in central Guizhou....
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| Format: | Article |
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Editorial Office of Hydrogeology & Engineering Geology
2022-07-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
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| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202109047 |
| _version_ | 1811170301048782848 |
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| author | Wangguang CHEN Cheng ZENG Xiaoyu GONG Zhiqin TAI Junzu DENG Mingxing YANG |
| author_facet | Wangguang CHEN Cheng ZENG Xiaoyu GONG Zhiqin TAI Junzu DENG Mingxing YANG |
| author_sort | Wangguang CHEN |
| collection | DOAJ |
| description | The Pingzhai Reservoir, a water source project of the Central Guizhou Province hydro-junction project, is located in the deep canyon karst area of the Sancha river in the Guizhou Plateau. It is an important water conservancy infrastructure to ensure the safety of water resources in central Guizhou. In this paper, the hydrological and hydrochemical automatic monitoring technology is used to study the hydrological and hydrochemical regime of the Santang underground river system, an important tributary in the interval basin of the Pingzhai Reservoir, which lacks the early basic research of hydrogeology. On this basis, the karst development and conduit model of the deep canyon karst subterraneous river system are preliminarily discussed. The results show that the hydrochemical regimes are mainly controlled by the cover CO2 effect, effective rainfall dilution effect and opening effect of runoff-discharge channels. In different time scales and atmospheric precipitation conditions, the variation characteristics of hydrochemical regime are different, and the corresponding dominant effect is also different. The annual variation of water temperature is high in summer and low in winter, and the daily variation is high in day and low at night. The annual variations of electrical conductivity and partial pressure of CO2 of the groundwater is high in normal-water level period and low in high-water level period because of the combined effects of land cover CO2 and rainfall dilution. On the monthly scale, the cover CO2 effect can be observed during the initial stage of rainfall, but after rainfall the dilution effect control the variation of electrical conductivity and Pco2. On the daily scale in the dry season, the daily hydrochemical regime controlled by the opening effect of the runoff-discharge channels can be observed. The identified opening effect of the runoff-discharge channels can provide a hydrochemical basis for judging the pressure state of karst conduit in the modeling study of the karst water system. This study provides a hydrogeological basis for the joint scheduling of surface and underground reservoirs and the reasonable utilization of water resources in this area in the future. |
| first_indexed | 2024-04-10T16:55:45Z |
| format | Article |
| id | doaj.art-dc1e233fc3764c1098213239673f1b89 |
| institution | Directory Open Access Journal |
| issn | 1000-3665 |
| language | zho |
| last_indexed | 2024-04-10T16:55:45Z |
| publishDate | 2022-07-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
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| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj.art-dc1e233fc3764c1098213239673f1b892023-02-07T08:15:27ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652022-07-01494192910.16030/j.cnki.issn.1000-3665.202109047202109047Hydrological and hydrochemical regime of a typical subterraneous river in a deep canyon karst area: A case study in the Santang underground river, GuizhouWangguang CHEN0Cheng ZENG1Xiaoyu GONG2Zhiqin TAI3Junzu DENG4Mingxing YANG5State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, CAS, Guiyang, Guizhou 550081, ChinaState Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, CAS, Guiyang, Guizhou 550081, ChinaState Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, CAS, Guiyang, Guizhou 550081, ChinaSchool of Karst Science, Guizhou Normal University/State Engineering Technology Institute for Karst Desertification Control, Guiyang, Guizhou 550001, ChinaSchool of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, Jiangxi 330013, ChinaSchool of Resources & Environmental Engineering, Guizhou Institute of Technology, Guiyang, Guizhou 550003, ChinaThe Pingzhai Reservoir, a water source project of the Central Guizhou Province hydro-junction project, is located in the deep canyon karst area of the Sancha river in the Guizhou Plateau. It is an important water conservancy infrastructure to ensure the safety of water resources in central Guizhou. In this paper, the hydrological and hydrochemical automatic monitoring technology is used to study the hydrological and hydrochemical regime of the Santang underground river system, an important tributary in the interval basin of the Pingzhai Reservoir, which lacks the early basic research of hydrogeology. On this basis, the karst development and conduit model of the deep canyon karst subterraneous river system are preliminarily discussed. The results show that the hydrochemical regimes are mainly controlled by the cover CO2 effect, effective rainfall dilution effect and opening effect of runoff-discharge channels. In different time scales and atmospheric precipitation conditions, the variation characteristics of hydrochemical regime are different, and the corresponding dominant effect is also different. The annual variation of water temperature is high in summer and low in winter, and the daily variation is high in day and low at night. The annual variations of electrical conductivity and partial pressure of CO2 of the groundwater is high in normal-water level period and low in high-water level period because of the combined effects of land cover CO2 and rainfall dilution. On the monthly scale, the cover CO2 effect can be observed during the initial stage of rainfall, but after rainfall the dilution effect control the variation of electrical conductivity and Pco2. On the daily scale in the dry season, the daily hydrochemical regime controlled by the opening effect of the runoff-discharge channels can be observed. The identified opening effect of the runoff-discharge channels can provide a hydrochemical basis for judging the pressure state of karst conduit in the modeling study of the karst water system. This study provides a hydrogeological basis for the joint scheduling of surface and underground reservoirs and the reasonable utilization of water resources in this area in the future.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202109047canyon karstsubterraneous riverhydrological and hydrochemical regimedilution effectco2 effectopening effect |
| spellingShingle | Wangguang CHEN Cheng ZENG Xiaoyu GONG Zhiqin TAI Junzu DENG Mingxing YANG Hydrological and hydrochemical regime of a typical subterraneous river in a deep canyon karst area: A case study in the Santang underground river, Guizhou Shuiwen dizhi gongcheng dizhi canyon karst subterraneous river hydrological and hydrochemical regime dilution effect co2 effect opening effect |
| title | Hydrological and hydrochemical regime of a typical subterraneous river in a deep canyon karst area: A case study in the Santang underground river, Guizhou |
| title_full | Hydrological and hydrochemical regime of a typical subterraneous river in a deep canyon karst area: A case study in the Santang underground river, Guizhou |
| title_fullStr | Hydrological and hydrochemical regime of a typical subterraneous river in a deep canyon karst area: A case study in the Santang underground river, Guizhou |
| title_full_unstemmed | Hydrological and hydrochemical regime of a typical subterraneous river in a deep canyon karst area: A case study in the Santang underground river, Guizhou |
| title_short | Hydrological and hydrochemical regime of a typical subterraneous river in a deep canyon karst area: A case study in the Santang underground river, Guizhou |
| title_sort | hydrological and hydrochemical regime of a typical subterraneous river in a deep canyon karst area a case study in the santang underground river guizhou |
| topic | canyon karst subterraneous river hydrological and hydrochemical regime dilution effect co2 effect opening effect |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202109047 |
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