Water Resources: the Need for Increased Hydrosolidarity
The presentation will analyse the reasons of the current water scarcity crisis and show that an important challenge to overcome it is to change the usual water resources paradigm by enlarging the concept to all types of water. In the classical approaches, only blue water i.e. water from rivers, lakes and groundwater is considered as the resource. It is however necessary to include green water (i.e. rainwater stored in the soils) and virtual water (i.e. water embedded in the traded products) in the reasoning. The specific case of Tunisia will be used to illustrate a possible new approach and some practical conclusions will be derived from this specific case study.