AGES was appointed for the determination of the groundwater component of the reserve for selected quaternary sub-catchments wihtin the Outeniqua Catchment. The aim is to evaluate the Swartvlei and Knysna River catchments within the regional Outeniqua catchment in terms of their Groundwater Reserve component. AGES was further appointed to evaluate the Grootbrak as well as the Kaaimans and Goukamma Catchments within the Outeniqua Catchment study area. The study initially comprised rapid reserve determination inputs through inception and implementation phases. These inputs were given with reference to the Outeniqua Coast Water Situation Study (OCWSS).