Developing Groundwater Supplies To Supplement The Water Supply Of Ladismith, Western Cape Province

Ladismith was established in 1851 where freshwater discharge from the Klein Swartberg Mountains. Growth of the town required building of the Goewerments Dam in 1920 and the Jan F le Grange Dam in 1978. However, water demand now matches supply, and water shortages are being experienced. Poor management and recent droughts exacerbated the situation. A project was initiated to address shortcomings with the existing supply and identify additional sources of water. Groundwater is an obvious option, with the regionally extensive Cango Fault located directly north of  the  town.  The  west-east  trending  fault  juxtaposes  highly  productive  Table  Mountain  Group Aquifers with less productive argillaceous rocks of the lower Witteberg Group. The Alluvial Aquifer is also a target, with a recently drilled DWA monitoring borehole reported to be high-yielding. Drilling and testing of three exploration boreholes drilled into the fault, returned lower than expected borehole  yields,  but  still sufficient  to  contribute  to  the  town’s water  supply  and  merit  further exploration. Boreholes drilled north of Ladismith could be used to increase the existing water supply by 50%.