An in-depth study of the hydrological cycle, evaporation/transpiration, and rainfall-runoff relationships in hydrogeology. The factors affecting evaporation and evapotranspiration from free water surfaces and soils. Different estimates and measurements of evaporation and evapotranspiration and soil moisture storage and movement. The nature and origin of different types of aquifers, their geological properties, the various types of groundwater flows to wells, flows within aquifers under steady/nonsteady conditions. Techniques of hydrogeological investigation, including drilling and pump testing. The hydraulics of surface water systems and seasonal variability of the flow pattern in streams and rivers. Flooding and drought. Special emphasis on the water resources of Jamaica and other Caribbean islands.