The migration and transformation processes of dissolved organic matter in rainwater- drip water- phreatic water of a typical karst spring catchment, in South China
The dissolved organic matter (DOM) migration and transformation in karst aquifer are of great significance for geochemical processes but remain poorly understood. In this study, we selected the Guilin Yaji Karst Experimental Site as a natural laboratory and collected rainwater (RW), drip water (DW),...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Shi, Jie [verfasserIn] Jiang, Guanghui [verfasserIn] Sun, Ziyong [verfasserIn] Liu, Fan [verfasserIn] Wang, Qigang [verfasserIn] |
|---|
| Format: |
E-Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2023 |
|---|
| Schlagwörter: |
Dissolved organic matter (DOM) |
|---|
| Übergeordnetes Werk: |
Enthalten in: Journal of hydrology - Amsterdam [u.a.] : Elsevier, 1963, 625 |
|---|---|
| Übergeordnetes Werk: |
volume:625 |
| DOI / URN: |
10.1016/j.jhydrol.2023.130077 |
|---|
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ELV064884406 |
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| 245 | 1 | 0 | |a The migration and transformation processes of dissolved organic matter in rainwater- drip water- phreatic water of a typical karst spring catchment, in South China |
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| 520 | |a The dissolved organic matter (DOM) migration and transformation in karst aquifer are of great significance for geochemical processes but remain poorly understood. In this study, we selected the Guilin Yaji Karst Experimental Site as a natural laboratory and collected rainwater (RW), drip water (DW), and phreatic water (PW) from September 2019 to September 2021 to study the DOM migration and transformation in a typical bare karst spring catchment. Hydrochemical and stable hydrogen and oxygen isotopes were applied to study the water cycle of the aquifer. Absorbance and fluorescence spectroscopy were used to characterize the DOM quality. Three-dimensional fluorescence combined with fluorescence regional integration was used for identifying the DOM compositions. The RW DOM had a weak humification degree and strong terrestrial characteristics. It was affected by the monsoon and showed higher humification in the dry season than in the wet season. The higher rainfall intensity had a dilution effect on the DOM fluorescence components levels when the rain intensity was>10 mm/day (not the threshold value). Continuous rain events led to the continuous dilution effect on RW DOM in the dry season, but such a phenomenon was not obvious in the wet season. The DW DOM inherited weak humification characteristic that was close to RW DOM but was altered by the hydrogeology conditions and plant root and microbial activities intensities of the upper vadose zone. The higher humification degree of PW DOM may be related to the higher degree of microbial processing caused by the longer groundwater residence time. The humic and hydrophobic degree of DOM for fissure PW was weaker than that for conduit PW because fissure media provides a superior condition for DOM to adsorb to the mineral surface. In the wet season, when the preferential channel of the aquifer was activated, the PW DOM showed similar characteristics to RW DOM, indicating a significant hydrologic effect on the PW DOM. Our results provide a valuable reference to advance understanding of DOM behavior in karst aquifer and highlight the importance of hydrogeologic conditions and hydrologic processes on DOM migration and transformation. | ||
| 650 | 4 | |a Dissolved organic matter (DOM) | |
| 650 | 4 | |a Guilin Yaji Karst Experimental Site | |
| 650 | 4 | |a Hydrogen and oxygen isotopes | |
| 650 | 4 | |a Hydrologic process | |
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| 700 | 1 | |a Jiang, Guanghui |e verfasserin |0 (orcid)0000-0003-2958-8496 |4 aut | |
| 700 | 1 | |a Sun, Ziyong |e verfasserin |0 (orcid)0000-0001-6556-8105 |4 aut | |
| 700 | 1 | |a Liu, Fan |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Qigang |e verfasserin |4 aut | |
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10.1016/j.jhydrol.2023.130077 doi (DE-627)ELV064884406 (ELSEVIER)S0022-1694(23)01019-3 DE-627 ger DE-627 rda eng 690 VZ 38.85 bkl Shi, Jie verfasserin (orcid)0000-0003-3690-7248 aut The migration and transformation processes of dissolved organic matter in rainwater- drip water- phreatic water of a typical karst spring catchment, in South China 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The dissolved organic matter (DOM) migration and transformation in karst aquifer are of great significance for geochemical processes but remain poorly understood. In this study, we selected the Guilin Yaji Karst Experimental Site as a natural laboratory and collected rainwater (RW), drip water (DW), and phreatic water (PW) from September 2019 to September 2021 to study the DOM migration and transformation in a typical bare karst spring catchment. Hydrochemical and stable hydrogen and oxygen isotopes were applied to study the water cycle of the aquifer. Absorbance and fluorescence spectroscopy were used to characterize the DOM quality. Three-dimensional fluorescence combined with fluorescence regional integration was used for identifying the DOM compositions. The RW DOM had a weak humification degree and strong terrestrial characteristics. It was affected by the monsoon and showed higher humification in the dry season than in the wet season. The higher rainfall intensity had a dilution effect on the DOM fluorescence components levels when the rain intensity was>10 mm/day (not the threshold value). Continuous rain events led to the continuous dilution effect on RW DOM in the dry season, but such a phenomenon was not obvious in the wet season. The DW DOM inherited weak humification characteristic that was close to RW DOM but was altered by the hydrogeology conditions and plant root and microbial activities intensities of the upper vadose zone. The higher humification degree of PW DOM may be related to the higher degree of microbial processing caused by the longer groundwater residence time. The humic and hydrophobic degree of DOM for fissure PW was weaker than that for conduit PW because fissure media provides a superior condition for DOM to adsorb to the mineral surface. In the wet season, when the preferential channel of the aquifer was activated, the PW DOM showed similar characteristics to RW DOM, indicating a significant hydrologic effect on the PW DOM. Our results provide a valuable reference to advance understanding of DOM behavior in karst aquifer and highlight the importance of hydrogeologic conditions and hydrologic processes on DOM migration and transformation. Dissolved organic matter (DOM) Guilin Yaji Karst Experimental Site Hydrogen and oxygen isotopes Hydrologic process Rainwater Karst aquifer Jiang, Guanghui verfasserin (orcid)0000-0003-2958-8496 aut Sun, Ziyong verfasserin (orcid)0000-0001-6556-8105 aut Liu, Fan verfasserin aut Wang, Qigang verfasserin aut Enthalten in Journal of hydrology Amsterdam [u.a.] : Elsevier, 1963 625 Online-Ressource (DE-627)268761817 (DE-600)1473173-3 (DE-576)077610628 1879-2707 nnns volume:625 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.85 Hydrologie: Allgemeines VZ AR 625 |
| spelling |
10.1016/j.jhydrol.2023.130077 doi (DE-627)ELV064884406 (ELSEVIER)S0022-1694(23)01019-3 DE-627 ger DE-627 rda eng 690 VZ 38.85 bkl Shi, Jie verfasserin (orcid)0000-0003-3690-7248 aut The migration and transformation processes of dissolved organic matter in rainwater- drip water- phreatic water of a typical karst spring catchment, in South China 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The dissolved organic matter (DOM) migration and transformation in karst aquifer are of great significance for geochemical processes but remain poorly understood. In this study, we selected the Guilin Yaji Karst Experimental Site as a natural laboratory and collected rainwater (RW), drip water (DW), and phreatic water (PW) from September 2019 to September 2021 to study the DOM migration and transformation in a typical bare karst spring catchment. Hydrochemical and stable hydrogen and oxygen isotopes were applied to study the water cycle of the aquifer. Absorbance and fluorescence spectroscopy were used to characterize the DOM quality. Three-dimensional fluorescence combined with fluorescence regional integration was used for identifying the DOM compositions. The RW DOM had a weak humification degree and strong terrestrial characteristics. It was affected by the monsoon and showed higher humification in the dry season than in the wet season. The higher rainfall intensity had a dilution effect on the DOM fluorescence components levels when the rain intensity was>10 mm/day (not the threshold value). Continuous rain events led to the continuous dilution effect on RW DOM in the dry season, but such a phenomenon was not obvious in the wet season. The DW DOM inherited weak humification characteristic that was close to RW DOM but was altered by the hydrogeology conditions and plant root and microbial activities intensities of the upper vadose zone. The higher humification degree of PW DOM may be related to the higher degree of microbial processing caused by the longer groundwater residence time. The humic and hydrophobic degree of DOM for fissure PW was weaker than that for conduit PW because fissure media provides a superior condition for DOM to adsorb to the mineral surface. In the wet season, when the preferential channel of the aquifer was activated, the PW DOM showed similar characteristics to RW DOM, indicating a significant hydrologic effect on the PW DOM. Our results provide a valuable reference to advance understanding of DOM behavior in karst aquifer and highlight the importance of hydrogeologic conditions and hydrologic processes on DOM migration and transformation. Dissolved organic matter (DOM) Guilin Yaji Karst Experimental Site Hydrogen and oxygen isotopes Hydrologic process Rainwater Karst aquifer Jiang, Guanghui verfasserin (orcid)0000-0003-2958-8496 aut Sun, Ziyong verfasserin (orcid)0000-0001-6556-8105 aut Liu, Fan verfasserin aut Wang, Qigang verfasserin aut Enthalten in Journal of hydrology Amsterdam [u.a.] : Elsevier, 1963 625 Online-Ressource (DE-627)268761817 (DE-600)1473173-3 (DE-576)077610628 1879-2707 nnns volume:625 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.85 Hydrologie: Allgemeines VZ AR 625 |
| allfields_unstemmed |
10.1016/j.jhydrol.2023.130077 doi (DE-627)ELV064884406 (ELSEVIER)S0022-1694(23)01019-3 DE-627 ger DE-627 rda eng 690 VZ 38.85 bkl Shi, Jie verfasserin (orcid)0000-0003-3690-7248 aut The migration and transformation processes of dissolved organic matter in rainwater- drip water- phreatic water of a typical karst spring catchment, in South China 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The dissolved organic matter (DOM) migration and transformation in karst aquifer are of great significance for geochemical processes but remain poorly understood. In this study, we selected the Guilin Yaji Karst Experimental Site as a natural laboratory and collected rainwater (RW), drip water (DW), and phreatic water (PW) from September 2019 to September 2021 to study the DOM migration and transformation in a typical bare karst spring catchment. Hydrochemical and stable hydrogen and oxygen isotopes were applied to study the water cycle of the aquifer. Absorbance and fluorescence spectroscopy were used to characterize the DOM quality. Three-dimensional fluorescence combined with fluorescence regional integration was used for identifying the DOM compositions. The RW DOM had a weak humification degree and strong terrestrial characteristics. It was affected by the monsoon and showed higher humification in the dry season than in the wet season. The higher rainfall intensity had a dilution effect on the DOM fluorescence components levels when the rain intensity was>10 mm/day (not the threshold value). Continuous rain events led to the continuous dilution effect on RW DOM in the dry season, but such a phenomenon was not obvious in the wet season. The DW DOM inherited weak humification characteristic that was close to RW DOM but was altered by the hydrogeology conditions and plant root and microbial activities intensities of the upper vadose zone. The higher humification degree of PW DOM may be related to the higher degree of microbial processing caused by the longer groundwater residence time. The humic and hydrophobic degree of DOM for fissure PW was weaker than that for conduit PW because fissure media provides a superior condition for DOM to adsorb to the mineral surface. In the wet season, when the preferential channel of the aquifer was activated, the PW DOM showed similar characteristics to RW DOM, indicating a significant hydrologic effect on the PW DOM. Our results provide a valuable reference to advance understanding of DOM behavior in karst aquifer and highlight the importance of hydrogeologic conditions and hydrologic processes on DOM migration and transformation. Dissolved organic matter (DOM) Guilin Yaji Karst Experimental Site Hydrogen and oxygen isotopes Hydrologic process Rainwater Karst aquifer Jiang, Guanghui verfasserin (orcid)0000-0003-2958-8496 aut Sun, Ziyong verfasserin (orcid)0000-0001-6556-8105 aut Liu, Fan verfasserin aut Wang, Qigang verfasserin aut Enthalten in Journal of hydrology Amsterdam [u.a.] : Elsevier, 1963 625 Online-Ressource (DE-627)268761817 (DE-600)1473173-3 (DE-576)077610628 1879-2707 nnns volume:625 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.85 Hydrologie: Allgemeines VZ AR 625 |
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10.1016/j.jhydrol.2023.130077 doi (DE-627)ELV064884406 (ELSEVIER)S0022-1694(23)01019-3 DE-627 ger DE-627 rda eng 690 VZ 38.85 bkl Shi, Jie verfasserin (orcid)0000-0003-3690-7248 aut The migration and transformation processes of dissolved organic matter in rainwater- drip water- phreatic water of a typical karst spring catchment, in South China 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The dissolved organic matter (DOM) migration and transformation in karst aquifer are of great significance for geochemical processes but remain poorly understood. In this study, we selected the Guilin Yaji Karst Experimental Site as a natural laboratory and collected rainwater (RW), drip water (DW), and phreatic water (PW) from September 2019 to September 2021 to study the DOM migration and transformation in a typical bare karst spring catchment. Hydrochemical and stable hydrogen and oxygen isotopes were applied to study the water cycle of the aquifer. Absorbance and fluorescence spectroscopy were used to characterize the DOM quality. Three-dimensional fluorescence combined with fluorescence regional integration was used for identifying the DOM compositions. The RW DOM had a weak humification degree and strong terrestrial characteristics. It was affected by the monsoon and showed higher humification in the dry season than in the wet season. The higher rainfall intensity had a dilution effect on the DOM fluorescence components levels when the rain intensity was>10 mm/day (not the threshold value). Continuous rain events led to the continuous dilution effect on RW DOM in the dry season, but such a phenomenon was not obvious in the wet season. The DW DOM inherited weak humification characteristic that was close to RW DOM but was altered by the hydrogeology conditions and plant root and microbial activities intensities of the upper vadose zone. The higher humification degree of PW DOM may be related to the higher degree of microbial processing caused by the longer groundwater residence time. The humic and hydrophobic degree of DOM for fissure PW was weaker than that for conduit PW because fissure media provides a superior condition for DOM to adsorb to the mineral surface. In the wet season, when the preferential channel of the aquifer was activated, the PW DOM showed similar characteristics to RW DOM, indicating a significant hydrologic effect on the PW DOM. Our results provide a valuable reference to advance understanding of DOM behavior in karst aquifer and highlight the importance of hydrogeologic conditions and hydrologic processes on DOM migration and transformation. Dissolved organic matter (DOM) Guilin Yaji Karst Experimental Site Hydrogen and oxygen isotopes Hydrologic process Rainwater Karst aquifer Jiang, Guanghui verfasserin (orcid)0000-0003-2958-8496 aut Sun, Ziyong verfasserin (orcid)0000-0001-6556-8105 aut Liu, Fan verfasserin aut Wang, Qigang verfasserin aut Enthalten in Journal of hydrology Amsterdam [u.a.] : Elsevier, 1963 625 Online-Ressource (DE-627)268761817 (DE-600)1473173-3 (DE-576)077610628 1879-2707 nnns volume:625 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.85 Hydrologie: Allgemeines VZ AR 625 |
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10.1016/j.jhydrol.2023.130077 doi (DE-627)ELV064884406 (ELSEVIER)S0022-1694(23)01019-3 DE-627 ger DE-627 rda eng 690 VZ 38.85 bkl Shi, Jie verfasserin (orcid)0000-0003-3690-7248 aut The migration and transformation processes of dissolved organic matter in rainwater- drip water- phreatic water of a typical karst spring catchment, in South China 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The dissolved organic matter (DOM) migration and transformation in karst aquifer are of great significance for geochemical processes but remain poorly understood. In this study, we selected the Guilin Yaji Karst Experimental Site as a natural laboratory and collected rainwater (RW), drip water (DW), and phreatic water (PW) from September 2019 to September 2021 to study the DOM migration and transformation in a typical bare karst spring catchment. Hydrochemical and stable hydrogen and oxygen isotopes were applied to study the water cycle of the aquifer. Absorbance and fluorescence spectroscopy were used to characterize the DOM quality. Three-dimensional fluorescence combined with fluorescence regional integration was used for identifying the DOM compositions. The RW DOM had a weak humification degree and strong terrestrial characteristics. It was affected by the monsoon and showed higher humification in the dry season than in the wet season. The higher rainfall intensity had a dilution effect on the DOM fluorescence components levels when the rain intensity was>10 mm/day (not the threshold value). Continuous rain events led to the continuous dilution effect on RW DOM in the dry season, but such a phenomenon was not obvious in the wet season. The DW DOM inherited weak humification characteristic that was close to RW DOM but was altered by the hydrogeology conditions and plant root and microbial activities intensities of the upper vadose zone. The higher humification degree of PW DOM may be related to the higher degree of microbial processing caused by the longer groundwater residence time. The humic and hydrophobic degree of DOM for fissure PW was weaker than that for conduit PW because fissure media provides a superior condition for DOM to adsorb to the mineral surface. In the wet season, when the preferential channel of the aquifer was activated, the PW DOM showed similar characteristics to RW DOM, indicating a significant hydrologic effect on the PW DOM. Our results provide a valuable reference to advance understanding of DOM behavior in karst aquifer and highlight the importance of hydrogeologic conditions and hydrologic processes on DOM migration and transformation. Dissolved organic matter (DOM) Guilin Yaji Karst Experimental Site Hydrogen and oxygen isotopes Hydrologic process Rainwater Karst aquifer Jiang, Guanghui verfasserin (orcid)0000-0003-2958-8496 aut Sun, Ziyong verfasserin (orcid)0000-0001-6556-8105 aut Liu, Fan verfasserin aut Wang, Qigang verfasserin aut Enthalten in Journal of hydrology Amsterdam [u.a.] : Elsevier, 1963 625 Online-Ressource (DE-627)268761817 (DE-600)1473173-3 (DE-576)077610628 1879-2707 nnns volume:625 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.85 Hydrologie: Allgemeines VZ AR 625 |
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690 VZ 38.85 bkl The migration and transformation processes of dissolved organic matter in rainwater- drip water- phreatic water of a typical karst spring catchment, in South China Dissolved organic matter (DOM) Guilin Yaji Karst Experimental Site Hydrogen and oxygen isotopes Hydrologic process Rainwater Karst aquifer |
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The migration and transformation processes of dissolved organic matter in rainwater- drip water- phreatic water of a typical karst spring catchment, in South China |
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The migration and transformation processes of dissolved organic matter in rainwater- drip water- phreatic water of a typical karst spring catchment, in South China |
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the migration and transformation processes of dissolved organic matter in rainwater- drip water- phreatic water of a typical karst spring catchment, in south china |
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The migration and transformation processes of dissolved organic matter in rainwater- drip water- phreatic water of a typical karst spring catchment, in South China |
| abstract |
The dissolved organic matter (DOM) migration and transformation in karst aquifer are of great significance for geochemical processes but remain poorly understood. In this study, we selected the Guilin Yaji Karst Experimental Site as a natural laboratory and collected rainwater (RW), drip water (DW), and phreatic water (PW) from September 2019 to September 2021 to study the DOM migration and transformation in a typical bare karst spring catchment. Hydrochemical and stable hydrogen and oxygen isotopes were applied to study the water cycle of the aquifer. Absorbance and fluorescence spectroscopy were used to characterize the DOM quality. Three-dimensional fluorescence combined with fluorescence regional integration was used for identifying the DOM compositions. The RW DOM had a weak humification degree and strong terrestrial characteristics. It was affected by the monsoon and showed higher humification in the dry season than in the wet season. The higher rainfall intensity had a dilution effect on the DOM fluorescence components levels when the rain intensity was>10 mm/day (not the threshold value). Continuous rain events led to the continuous dilution effect on RW DOM in the dry season, but such a phenomenon was not obvious in the wet season. The DW DOM inherited weak humification characteristic that was close to RW DOM but was altered by the hydrogeology conditions and plant root and microbial activities intensities of the upper vadose zone. The higher humification degree of PW DOM may be related to the higher degree of microbial processing caused by the longer groundwater residence time. The humic and hydrophobic degree of DOM for fissure PW was weaker than that for conduit PW because fissure media provides a superior condition for DOM to adsorb to the mineral surface. In the wet season, when the preferential channel of the aquifer was activated, the PW DOM showed similar characteristics to RW DOM, indicating a significant hydrologic effect on the PW DOM. Our results provide a valuable reference to advance understanding of DOM behavior in karst aquifer and highlight the importance of hydrogeologic conditions and hydrologic processes on DOM migration and transformation. |
| abstractGer |
The dissolved organic matter (DOM) migration and transformation in karst aquifer are of great significance for geochemical processes but remain poorly understood. In this study, we selected the Guilin Yaji Karst Experimental Site as a natural laboratory and collected rainwater (RW), drip water (DW), and phreatic water (PW) from September 2019 to September 2021 to study the DOM migration and transformation in a typical bare karst spring catchment. Hydrochemical and stable hydrogen and oxygen isotopes were applied to study the water cycle of the aquifer. Absorbance and fluorescence spectroscopy were used to characterize the DOM quality. Three-dimensional fluorescence combined with fluorescence regional integration was used for identifying the DOM compositions. The RW DOM had a weak humification degree and strong terrestrial characteristics. It was affected by the monsoon and showed higher humification in the dry season than in the wet season. The higher rainfall intensity had a dilution effect on the DOM fluorescence components levels when the rain intensity was>10 mm/day (not the threshold value). Continuous rain events led to the continuous dilution effect on RW DOM in the dry season, but such a phenomenon was not obvious in the wet season. The DW DOM inherited weak humification characteristic that was close to RW DOM but was altered by the hydrogeology conditions and plant root and microbial activities intensities of the upper vadose zone. The higher humification degree of PW DOM may be related to the higher degree of microbial processing caused by the longer groundwater residence time. The humic and hydrophobic degree of DOM for fissure PW was weaker than that for conduit PW because fissure media provides a superior condition for DOM to adsorb to the mineral surface. In the wet season, when the preferential channel of the aquifer was activated, the PW DOM showed similar characteristics to RW DOM, indicating a significant hydrologic effect on the PW DOM. Our results provide a valuable reference to advance understanding of DOM behavior in karst aquifer and highlight the importance of hydrogeologic conditions and hydrologic processes on DOM migration and transformation. |
| abstract_unstemmed |
The dissolved organic matter (DOM) migration and transformation in karst aquifer are of great significance for geochemical processes but remain poorly understood. In this study, we selected the Guilin Yaji Karst Experimental Site as a natural laboratory and collected rainwater (RW), drip water (DW), and phreatic water (PW) from September 2019 to September 2021 to study the DOM migration and transformation in a typical bare karst spring catchment. Hydrochemical and stable hydrogen and oxygen isotopes were applied to study the water cycle of the aquifer. Absorbance and fluorescence spectroscopy were used to characterize the DOM quality. Three-dimensional fluorescence combined with fluorescence regional integration was used for identifying the DOM compositions. The RW DOM had a weak humification degree and strong terrestrial characteristics. It was affected by the monsoon and showed higher humification in the dry season than in the wet season. The higher rainfall intensity had a dilution effect on the DOM fluorescence components levels when the rain intensity was>10 mm/day (not the threshold value). Continuous rain events led to the continuous dilution effect on RW DOM in the dry season, but such a phenomenon was not obvious in the wet season. The DW DOM inherited weak humification characteristic that was close to RW DOM but was altered by the hydrogeology conditions and plant root and microbial activities intensities of the upper vadose zone. The higher humification degree of PW DOM may be related to the higher degree of microbial processing caused by the longer groundwater residence time. The humic and hydrophobic degree of DOM for fissure PW was weaker than that for conduit PW because fissure media provides a superior condition for DOM to adsorb to the mineral surface. In the wet season, when the preferential channel of the aquifer was activated, the PW DOM showed similar characteristics to RW DOM, indicating a significant hydrologic effect on the PW DOM. Our results provide a valuable reference to advance understanding of DOM behavior in karst aquifer and highlight the importance of hydrogeologic conditions and hydrologic processes on DOM migration and transformation. |
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| score |
7.40077 |