The assessment of the effectiveness and feasibility of adaptation options shows that a portfolio of supply-and-demand measures is needed to reduce water scarcity , although locally demand-side measures could be sufficient . Under high warming levels, adaptation to drought and low flows by water saving and efficiency measures may not be sufficient to counteract reduced availability  . Successful adaptation in the water sector depends on integrating water considerations into sectoral policies . Inclusive and participatory approaches where  stakeholders are actively involved in the initiation and execution of water management can enhance problem ownership, the quality and democratic legitimacy of processes and decisions, enhance support and accelerate decisions .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report