-Water Resources management should be assessed under climate change conditions, as historic data cannot replicate future climatic conditions. -Bottom-up approaches, i.e., the forcing of hydrologic simulation models with climate change models\' outputs, a. -Climate change impacts on Water Resources are bound to affect all Water uses, i.e., irrigated agriculture, domestic and industrial Water supply, hydropower generation, and environmental flow (of streams and rivers) and Water level (of lakes). -Water Resources management should be assessed under climate change conditions, as historic data cannot replicate future climatic conditions