The Water Resource in Tropical Africa and Its Exploitation

Africa allow amounts annual aquifer areas arid balance borehole capacity catchment cause climatic construction continuous cost curve cycle depend depth discharge distribution drilling East economic effects efficiency energy erosion estimate evaporation example factor fall Figure flood flow frequency gauges give given ground groundwater hand hole hydrological important increase indicate infiltration International Kenya lead less limits livestock loss maintenance major material maximum mean measure ment methods natural normally occur operation period planning possible potential prevent problem pump rain rainfall range recharge records regions relation Research reservoir river rock runoff saline season simple soil storage stream surface surface water Table techniques tion tropical unit usually values vegetation water resources water supply whole country wind yield zone