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Water plays a major role in sustaining ecosystems services (Gordon, Finlayson, and Falkenmark 2010) and maintaining their resilience to cope with extreme drought or floods (Folke et al. 2002). Maintaining ecosystem services in an agricultural landscape is helpful in managing water resources (Rockström et al. 2010).While a River Basin Management Plan makes an overview of a whole river basin district, independent of administrative internal boundaries, IWRM should also focus on downscaling to smaller areas (generally below 1000 km²) when it comes to measures to identify win-win opportunities between upstream and downstream areas. An example can be upstream green water investments like water harvesting with implications for downstream uses like reduced sedimentation. (Rockström et al. 2010)