Site is in French.
The site has several useful online publications on these issues. Site is not specifically oriented to drylands. USDA-ARS Southwest Watershed Research Station Basic and applied research in global change, hydrology and water resources, erosion and sedimentation, water quality, and decision support systems. USDA-ARS Water Management Research Laboratory WMRL's mission is to develop advanced water management practices, methods, equipment, and systems, to improve efficiency, sustainability and crop productivity in arid and semiarid irrigated agriculture. Dr. Julian Thompson of the WRU has conducted several research projects concerning the Hadejia-Nguru Wetlands of northern Nigeria.