World Meteorological Organisation

"IAHS encourages and supports this program as its objectives are is to study the hydrological cycle on the Earth and the waters of the continents, to study erosion and sedimentation and their relation to the hydrological cycle, to examine the hydrological aspects of the use and management of water resources and their change under the influence of man's activities and to provide a firm scientific basis for the optimal utilization of water resources systems."