groundwater recharge

This study was focused on estimating groundwater recharge response from rainfall events in a semi-arid fractured aquifer. Determination of response of the groundwater recharge from rainfall is important as it directly affects the available groundwater in an aquifer. Groundwater level data was used to evaluate the response of groundwater recharge from rainfall events using Extended model for Aquifer Recharge and soil moisture Transport through unsaturated Hard rock (EARTH) model.

Groundwater recharge assessment was undertaken in the crystalline aquifer of the Upper Crocodile River Basin, Johannesburg South Africa. The basin is characterised by the complex hydrogeological setting represented by weathered and fractured granitic gneisses overlain by quartzite, shale and dolostone. A number of recharge estimation methods including the Stable Isotope Enrichment Shift method, were tested.