The course aims to make students aware of the aspects of water availability and consumption and the effects that can lead to critical situations that could endanger the safety of the water supply. It aims to show how the supply systems and water availability are inseparable from the environmental/climatic aspects. From this starting point, water resource management actions arise. A management plan that will have to be integrated into the hydrological cycle and that calls for a circular economy vision to guarantee sustainability prospects. The goal is to introduce risk and reliability analysis tools for water resources.