Part 1 Physical and social geography in the Sahel with special reference to the northern Kayes region: climate and hydrology; vegetation; agriculture; soils; sociology and infrastructure. Part 2 Runoff irrigation: principles of runoff irrigation; summary of important parameters for implementing runoff irrigation in the Sahel. Part 3 Hydrologic fundamentals: rainfall-runoff; factors detemining the overland flow process - climatic factors, geomorphological factors, channel characteristics, geographic location of the catchment area, coils, vegetation, land use; rainfall-rainoff models - rational method, isochronic or time-area method, the unit hydrograph method, the US Soil Conservation Service (SCS) method, BOUGHTON method, ORSTOM mode,, the etats de surface concept. Part 4 Remote sensing for the determination of potential sites for runoff irrigation: application of satellite imagery; principles of satellite remote sensing - types of sensors, assessment procedure; outline of a geographical information system (GIS); application of remote sensing in the reference location in Mali - acquisition of appropriate satellite imagery (TM and SPOT), selection of classification procedure, selection of classes and training areas, selection of channels for classification, classification results; results of classification in the reference location in Mali. Part 5 Specification of potential runoff irrigation areas in northern Kayes Region in Mali. Part 6 Approach for the determination of the water harvest potential: characteristic features of the Henno catchment area; hydrological data on the catchment area; application of the rainfall-runoff models - rational method, unit hydrograph method, SCS method, BOUGHTON method, etats de surface method; discussion of results with reference to the source-area concept. Part 7 Planning schedule. Part 8 Evaluation of methodology and prospects.