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Framework for mapping large-scale nature-based solutions for drought mitigation: Regional application in Flanders
Yimer, E.A.; De Trift, L.; Dondeyne, S.; Speijer, L.; Huysmans, M.; Cools, J.; Nossent, J.; Van Griensven, A. (2024). Framework for mapping large-scale nature-based solutions for drought mitigation: Regional application in Flanders. Wat. Res. 261: 122003. https://dx.doi.org/10.1016/j.watres.2024.122003
In: Water Research. Elsevier: Oxford; New York. ISSN 0043-1354; e-ISSN 1879-2448, meer
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Water management > Risk > Low water strategies
Water management > Water quantity > Water balance - Water availability
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| Project | Top | Auteurs |
- PhD - Predicting Impact Climate Change on Drought in the Scheldt River Basin, meer
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| Auteurs | | Top |
- Yimer, E.A.
- De Trift, L.
- Dondeyne, S.
- Speijer, L.
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| Abstract |
Droughts are classified as the most expensive climate disasters as they leave long-term and chronic impacts on the ecosystem, agriculture, and human society. The intensity, frequency, and duration of drought events have increased in the past and are expected to continue rising at global, continental, and regional scales. Nature-based solutions (NBS) are highlighted as effective solutions to cope with the future impacts of these events. Despite this, there has been limited comprehensive research on the effectiveness of NBS for drought mitigation, and existing suitability mapping frameworks often overlook drought-specific criteria. To address this gap, a new framework is proposed to identify areas suitable for two drought-coping NBS types at a regional scale: detention basins and managed aquifer recharge. Two multi-criteria decision-making techniques (MCDM), i.e. Boolean logic and Analytic- Hierarchy Process (AHP), were used to map suitable large-scale NBS. The new framework accounts for unique criteria to specifically address drought conditions. By incorporating climate change scenarios for both surface and groundwater, recharge, and different groundwater characteristics, it identifies suitable and sustainable locations capable of managing extreme drought events. Executed through Boolean logic at a regional scale in Flanders (Belgium), the framework's strict approach yields significant potential areas for detention basins (298.7 km²) and managed aquifer recharge (867.5 km²). Incorporating AHP with the same criteria introduces a higher degree of flexibility for decision-makers. This approach shows a notable expansion across Flanders, varying with the level of suitability. The results underscore the highly suitable potential for detention basins (2552.2 km²) and managed aquifer recharge (2538.7 km²), emphasizing the adaptability and scalability of the framework for addressing drought in the region. The comparison between potential recharge volume due to detention basin and groundwater use in the region indicated that the detention basins could partially compensate for the high water demand. Therefore, creating a framework targeting drought is vital for the sustainable management of water scarcity scenarios. |
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