The potential of unused small-scale water reservoirs for climate change adaptation: A model- and scenario based analysis of a local water reservoir system in Thuringia, Germany

The 6th Intergovernmental Panel on Climate Change (IPCC) report (2021) stated that hot extremes have become more frequent and intense across most land regions in the past decades. It is projected changing climatic conditions Germany Thuringia particular will lead to a higher frequency of drought events. Thus, it vital develop local adaptation strategies mitigate effects droughts agriculture ensure future crop production. Water resource infrastructure has critical role planning climate change measures are sustainable. As construction new dams reservoirs controversial, preferable use existing infrastructures, if they suitable. Small-scale water management built during GDR (German Democratic Republic) decommissioned after German reunification were examined this study determine whether their reuse could be considered as potential strategy. For purpose, three selected. impact soil moisture, availability production, from meet irrigation needs modeled using Evaluation Planning system (WEAP). changes direct moisture status, leading demand agriculture. results show double between near (2020–2040) distant (2071–2100). However, predicted declines yields can mitigated by irrigation; modeling indicate supplemental with reservoir mitigates losses even allows 6.2–13.5% Hence, worth an strategy policymakers. In addition cost-benefit analysis for evaluation reservoirs, user interests demands need included avoiding conflicts about water. general, WEAP tool findings show, research approach used investigate adaptive capacity other small-scale infrastructures.