Affiliation: | (1) CNRS, UMR HydroSciences, Universit? de Montpellier 2, Place E. Bataillon, CC. MSE, 34095 Montpellier cedex 5, France;(2) IRD, UMR HydroSciences, 276 Av. de Maradi, BP 11416, Niamey, Niger;(3) IRD, UMR HydroSciences, Universit? de Montpellier 2, Place E. Bataillon, CC. MSE, 34095 Montpellier cedex 5, France;(4) D?partement de G?ologie, Universit? Abdou Moumouni, BP 10662, Niamey, Niger;(5) IRD, UMR LTHE, Indo-French Cell for Water Science, Indian Institute of Science, 560012 Bangalore, India;(6) IRD, UMR LTHE, BP 53, 38041 Grenoble cedex 9, France; |