Integrated water resources management is generally considered a relevant methodology given the pressing necessity to use water in a sustainable manner. However, its application framework still needs refinements. As a first step towards the creation of such an improved framework, a system model for water management has been proposed, including a broad view upon the elements involved directly or indirectly (such as the energy, the public health or the housing conditions) in water management. The model may be applied to large entities such as regions or cities. This could lead to the creation of “information systems about the system”, systemic views with access to detailed data regarding the water-related infrastructures, ecosystem, natural and human resources, and legislative context, including relationships between these elements.