To address issues of integrated water management of large watersheds in the face of global change, the German Federal Ministry for Science and Education has initiated a large program under the name "GLOWA". GLOWA comprises five research projects along a gradient from North Germany to West Africa. The GLOWA Volta Project concerns itself with the analysis of the water cycle in the Volta Basin and the subsequent development of a decision support system. The research team consists of meteorologists, hydrologists, agronomists, geographers, economists, and institutional analysts.