7 Institut de Recherche pour le Développement, Niamey, Niger.
8 Department of Geography, University of Sussex, Falmer, UK.
9 Institute for Risk and Disaster Reduction, University College London, London, UK.
10 International Water Management Institute, Pretoria, South Africa.
11 British Geological Survey, Lyell Centre, Edinburgh, UK.
12 Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, USA.
13 Université d'Abomey-Calavi, Institut Nationale de l'Eau, Chaire Internationale de Physique Mathématique et Applications, Institut de Recherche pour le Développement, Cotonou, Benin.
14 Université Grenoble Alpes, Institut de Recherche pour le Développement, Centre Nationale de la Recherche Scientifique, Institut Polytechnique de Grenoble, Institut des Géosciences de l'Environnement, Grenoble, France.
15 Direction Générale de l'Eau, Cotonou, Benin.
16 Department of Forest Resources Assessment and Management, Sokoine University of Agriculture, Morogoro, Tanzania.
17 British Geological Survey, Maclean Building, Wallingford, UK.
18 Department of Geology and Petroleum Studies, Makerere University, Kampala, Uganda.
19 Department of Civil and Environmental Engineering, Makerere University, Kampala, Uganda.
20 Department of Geology, Université Abdou Moumouni, Niamey, Niger.
21 Department of Geology, University of Maiduguri, Maiduguri, Nigeria.
22 Cemex, Rugby, UK.
23 Water Research Institute, Accra, Ghana.
24 Département des Sciences de la Terre, Université Ouaga I Pr Joseph Ki-Zerbo, Ouagadougou, Burkina Faso.
25 Department of Geology, University of Namibia, Windhoek, Namibia.
26 Department of Geography and Environmental Management, University of the West of England, Bristol, UK.
27 Institute of Industrial Science, The University of Tokyo, Tokyo, Japan.
28 International Institute for Applied Systems Analysis, Laxenburg, Austria.
29 Department of Atmospheric Sciences, National Taiwan University, Taipei City, Taiwan.
30 Institute for Future Initiatives, The University of Tokyo, Tokyo, Japan.
31 International Groundwater Resources Assessment Centre, Delft, The Netherlands.