| DOI | 10.5194/hess-22-3807-2018
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| Dynamics of water fluxes and storages in an Alpine karst catchment under current and potential future climate conditions |
| Chen Z.; Hartmann A.; Wagener T.; Goldscheider N.
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| 发表日期 | 2018
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| ISSN | 1027-5606
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| 起始页码 | 3807
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| 结束页码 | 3823
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| 卷号 | 22期号:7 |
| 英文摘要 | Karst aquifers are difficult to manage due to their unique hydrogeological characteristics. Future climate projections suggest a strong change in temperature and precipitation regimes in European karst regions over the next decades. Alpine karst systems can be especially vulnerable under changing hydro-meteorological conditions since snowmelt in mountainous environments is an important controlling process for aquifer recharge and is highly sensitive to varying climatic conditions. Our paper presents the first study to investigate potential impacts of climate change on mountainous karst systems by using a combined lumped and distributed modeling approach with consideration of subsurface karst drainage structures. The study site is characterized by high-permeability (karstified) limestone formations and low-permeability (non-karst) sedimentary Flysch. The model simulation under current conditions demonstrates that a large proportion of precipitation infiltrates into the karst aquifer as autogenic recharge. Moreover, the result shows that surface snow storage is dominant from November to April, while subsurface water storage in the karst aquifer dominates from May to October. The climate scenario runs demonstrate that varied climate conditions significantly affect the spatiotemporal distribution of water fluxes and storages: (1) the total catchment discharge decreases under all evaluated future climate conditions. (2) The spatiotemporal discharge pattern is strongly controlled by temperature variations, which can shift the seasonal snowmelt pattern, with snow storage in the cold season (December to April) decreasing significantly under all change scenarios. (3) Increased karst aquifer recharge in winter and spring, and decreased recharge in summer and autumn, partly offset each other. (4) Impacts on the karst springs are distinct; the lowest permanent spring presents a "robust" discharge behavior, while the highest overflow outlet is highly sensitive to changing climate. This analysis effectively demonstrates that the impacts on subsurface flow dynamics are regulated by the characteristic dual flow and spatially heterogeneous distributed drainage structure of the karst aquifer. Overall, our study highlights the fast groundwater dynamics in mountainous karst catchments, which make them highly vulnerable to future changing climate conditions. Additionally, this work presents a novel holistic modeling approach, which can be transferred to similar karst systems for studying the impact of climate change on local karst water resources with consideration of their individual hydrogeological complexity and hydraulic heterogeneity. © 2018 Author(s). |
| 语种 | 英语
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| scopus关键词 | Aquifers; Catchments; Dynamics; Groundwater resources; Hydrogeology; Landforms; Lime; Recharging (underground waters); Runoff; Snow; Snow melting systems; Springs (water); Future climate projections; Hydrogeological characteristics; Karst water resources; Lumped and distributed models; Meteorological condition; Mountainous environment; Spatiotemporal distributions; Temperature variation; Climate change; alpine environment; aquifer; catchment; climate change; climate conditions; complexity; flux measurement; flysch; future prospect; groundwater; hydrogeology; hydrological modeling; mountain environment; precipitation (climatology); recharge; seasonal variation; simulation; snowmelt; subsurface flow; water storage; Europe |
| 来源期刊 | Hydrology and Earth System Sciences
(IF:4.936[JCR-2018],5.615[5-Year]) |
| 文献类型 | 期刊论文
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| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/159972
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| 作者单位 | Chen, Z., Institute of Applied Geosciences, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany; Hartmann, A., Institute of Hydrology, Albert Ludwigs University of Freiburg, Freiburg, Germany, Department of Civil Engineering, University of Bristol, United Kingdom; Wagener, T., Department of Civil Engineering, University of Bristol, United Kingdom; Goldscheider, N., Institute of Applied Geosciences, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
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推荐引用方式
GB/T 7714 |
Chen Z.,Hartmann A.,Wagener T.,et al. Dynamics of water fluxes and storages in an Alpine karst catchment under current and potential future climate conditions[J],2018,22(7).
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| APA |
Chen Z.,Hartmann A.,Wagener T.,&Goldscheider N..(2018).Dynamics of water fluxes and storages in an Alpine karst catchment under current and potential future climate conditions.Hydrology and Earth System Sciences,22(7).
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| MLA |
Chen Z.,et al."Dynamics of water fluxes and storages in an Alpine karst catchment under current and potential future climate conditions".Hydrology and Earth System Sciences 22.7(2018).
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