دورية أكاديمية
Groundwater and baseflow drought responses to synthetic recharge stress tests
| العنوان: | Groundwater and baseflow drought responses to synthetic recharge stress tests |
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| المؤلفون: | J. Hellwig, M. Stoelzle, K. Stahl |
| المصدر: | Hydrology and Earth System Sciences, Vol 25, Pp 1053-1068 (2021) |
| بيانات النشر: | Copernicus Publications, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Technology LCC:Environmental technology. Sanitary engineering LCC:Geography. Anthropology. Recreation LCC:Environmental sciences |
| مصطلحات موضوعية: | Technology, Environmental technology. Sanitary engineering, TD1-1066, Geography. Anthropology. Recreation, Environmental sciences, GE1-350 |
| الوصف: | Groundwater is the main source of freshwater and maintains streamflow during drought. Potential future groundwater and baseflow drought hazards depend on the systems' sensitivity to altered recharge conditions. We performed groundwater model experiments using three different generic stress tests to estimate the groundwater and baseflow drought sensitivity to changes in recharge. The stress tests stem from a stakeholder co-design process that specifically followed the idea of altering known drought events from the past, i.e. asking whether altered recharge could have made a particular event worse. Across Germany, groundwater responses to the stress tests are highly heterogeneous, with groundwater heads in the north more sensitive to long-term recharge and in the Central German Uplands to short-term recharge variations. Baseflow droughts are generally more sensitive to intra-annual dynamics, and baseflow responses to the stress tests are smaller compared to the groundwater heads. The groundwater drought recovery time is mainly driven by the hydrogeological conditions, with slow (fast) recovery in the porous (fractured rock) aquifers. In general, a seasonal shift of recharge (i.e. less summer recharge and more winter recharge) will have lesser effects on groundwater and baseflow drought severity. A lengthening of dry spells might cause much stronger responses, especially in regions with slow groundwater response to precipitation. Water management may need to consider the spatially different sensitivities of the groundwater system and the potential for more severe groundwater droughts in the large porous aquifers following prolonged meteorological droughts, particularly in the context of climate change projections indicating stronger seasonality and more severe drought events. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1053-2021 1027-5606 1607-7938 |
| Relation: | https://hess.copernicus.org/articles/25/1053/2021/hess-25-1053-2021.pdf; https://doaj.org/toc/1027-5606; https://doaj.org/toc/1607-7938 |
| DOI: | 10.5194/hess-25-1053-2021 |
| URL الوصول: | https://doaj.org/article/634faa91fe264c44b20774868acbf867 |
| رقم الأكسشن: | edsdoj.634faa91fe264c44b20774868acbf867 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 10532021 10275606 16077938 |
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| DOI: | 10.5194/hess-25-1053-2021 |