Isotopic insights on quantitative assessments of interaction of eco-hydrological processes in multi-scale karst watersheds
The dynamics of hydrological processes and the storage mechanisms of karst water resources are the most important issues in karst hydrology. The impact of environmental changes on water quantity, and the evaluation and quantification of eco-hydrological processes remain poorly addressed. In this stu...
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KeAi Communications Co., Ltd.
2024-03-01
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| Series: | International Soil and Water Conservation Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095633923000333 |
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| author | Zhuo Hao Yang Gao Qingwen Zhang Wen Wen |
| author_facet | Zhuo Hao Yang Gao Qingwen Zhang Wen Wen |
| author_sort | Zhuo Hao |
| collection | DOAJ |
| description | The dynamics of hydrological processes and the storage mechanisms of karst water resources are the most important issues in karst hydrology. The impact of environmental changes on water quantity, and the evaluation and quantification of eco-hydrological processes remain poorly addressed. In this study, high-frequency continuous monitoring in multi-scale karst watersheds in Southwest China combined the approaches of water isotopes and the hybrid single-particle lagrangian integrated trajectory (HYSPLIT) model to identify the recharge mechanisms between atmospheric vapor, rainfall, surface water, and groundwater, and to reveal the interaction of eco-hydrological processes. The dominant moisture sources in Puding (PD) County were the Indian Ocean (43–69%) and local moisture (24–33%). The δ18O and deuterium excess (d-excess) values showed a positive correlation indicating that secondary or sub-cloud evaporation was prominent in the wet seasons. Karst water line-conditioned excess (lc-excess) indicated that karst water interacted with recent precipitation, groundwater, and evaporation across seasons. Owing to its specific hydrogeological structure, surface water and rainwater have a higher contribution rate to groundwater replenishment. The Chenqi stream replenished the Houzhai River mainly in the form of groundwater, with percentages ranging from 38.1 to 93.5% in the wet season, and 47.8–80.1% in the dry season. In the Houzhai outlet, surface water and groundwater interconverted frequently with a percentage of 45.6–49.1%. We believe this is the first systematic study to quantify the supply relationship between water vapor transport, rainfall, surface water and groundwater in the Chinese karst zone, making a significant move forward in the field of karst hydrological processes and improving the efficiency of water resource evaluation and management. |
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| id | doaj.art-68d32b98024b4585b1b781e6a711accd |
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| issn | 2095-6339 |
| language | English |
| last_indexed | 2024-04-24T14:11:54Z |
| publishDate | 2024-03-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | International Soil and Water Conservation Research |
| spelling | doaj.art-68d32b98024b4585b1b781e6a711accd2024-04-03T09:09:08ZengKeAi Communications Co., Ltd.International Soil and Water Conservation Research2095-63392024-03-01121156170Isotopic insights on quantitative assessments of interaction of eco-hydrological processes in multi-scale karst watershedsZhuo Hao0Yang Gao1Qingwen Zhang2Wen Wen3Agricultural Clean Watershed Research Group, Institute of Environment and Sustainable Development in Agriculture, CAAS, Beijing, 100081, ChinaKey Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing, 100101, China; Corresponding author.Agricultural Clean Watershed Research Group, Institute of Environment and Sustainable Development in Agriculture, CAAS, Beijing, 100081, ChinaSchool of Humanities and Social Sciences, Beijing Institute of Technology, Beijing, 100081, ChinaThe dynamics of hydrological processes and the storage mechanisms of karst water resources are the most important issues in karst hydrology. The impact of environmental changes on water quantity, and the evaluation and quantification of eco-hydrological processes remain poorly addressed. In this study, high-frequency continuous monitoring in multi-scale karst watersheds in Southwest China combined the approaches of water isotopes and the hybrid single-particle lagrangian integrated trajectory (HYSPLIT) model to identify the recharge mechanisms between atmospheric vapor, rainfall, surface water, and groundwater, and to reveal the interaction of eco-hydrological processes. The dominant moisture sources in Puding (PD) County were the Indian Ocean (43–69%) and local moisture (24–33%). The δ18O and deuterium excess (d-excess) values showed a positive correlation indicating that secondary or sub-cloud evaporation was prominent in the wet seasons. Karst water line-conditioned excess (lc-excess) indicated that karst water interacted with recent precipitation, groundwater, and evaporation across seasons. Owing to its specific hydrogeological structure, surface water and rainwater have a higher contribution rate to groundwater replenishment. The Chenqi stream replenished the Houzhai River mainly in the form of groundwater, with percentages ranging from 38.1 to 93.5% in the wet season, and 47.8–80.1% in the dry season. In the Houzhai outlet, surface water and groundwater interconverted frequently with a percentage of 45.6–49.1%. We believe this is the first systematic study to quantify the supply relationship between water vapor transport, rainfall, surface water and groundwater in the Chinese karst zone, making a significant move forward in the field of karst hydrological processes and improving the efficiency of water resource evaluation and management.http://www.sciencedirect.com/science/article/pii/S2095633923000333Stable isotopeMoisture sourcesWater cycleKarst watersheds |
| spellingShingle | Zhuo Hao Yang Gao Qingwen Zhang Wen Wen Isotopic insights on quantitative assessments of interaction of eco-hydrological processes in multi-scale karst watersheds International Soil and Water Conservation Research Stable isotope Moisture sources Water cycle Karst watersheds |
| title | Isotopic insights on quantitative assessments of interaction of eco-hydrological processes in multi-scale karst watersheds |
| title_full | Isotopic insights on quantitative assessments of interaction of eco-hydrological processes in multi-scale karst watersheds |
| title_fullStr | Isotopic insights on quantitative assessments of interaction of eco-hydrological processes in multi-scale karst watersheds |
| title_full_unstemmed | Isotopic insights on quantitative assessments of interaction of eco-hydrological processes in multi-scale karst watersheds |
| title_short | Isotopic insights on quantitative assessments of interaction of eco-hydrological processes in multi-scale karst watersheds |
| title_sort | isotopic insights on quantitative assessments of interaction of eco hydrological processes in multi scale karst watersheds |
| topic | Stable isotope Moisture sources Water cycle Karst watersheds |
| url | http://www.sciencedirect.com/science/article/pii/S2095633923000333 |
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