Présentations Colloques

Oral Presentation
Session 7.05: The Challenges for Transboundary aquifer management
Dumont Aurélien
World Groundwater Mapping - WHYMAP- the Global Map of Groundwater Vulnerability to Floods and Droughts and the World Map of Karst and Carbonate Aquifers
One third of the global population depends on groundwater for their drinking water, in arid and semi-arid areas the dependency is between 60 and 100%. About 40% of the world's food is produced by groundwater-irrigated farming. While surface water is much more vulnerable to pollution and climatic variations, groundwater plays a vital role for water and food security. But this security might be at risk by natural hazards like floods and droughts. Especially in emergency situations, decision makers need to know where to access safe groundwater resources for drinking water purposes.****To convey groundwater vulnerability-related information in a way appropriate at the global scale, the World-wide Hydrogeological Mapping and Assessment Programme (WHYMAP) recently published the “Global Map of Groundwater Vulnerability to Floods and Droughts” under the auspices of BGR and UNESCO. As karst aquifers constitutes a particularly vulnerable environment, this map is complemented by the new “World Map of Karst and Carbonate Aquifers”, currently under preparation.****In addition to presenting the main outputs of these initiatives, i.e. the two maps, and their background data and methodology, this contribution aims to share and discuss the process and challenges linked to the preparation of such products, undertaken at the global scale, with the objective to present appropriate information for global discussion on water issues and to emphasize the presence of underground water resources.**