Groundwater governance collaboration across borders
In South Africa, even large metropoles like Cape Town have challenges supplying sufficient water. To secure reliable water supply for the future local Saldanha Bay municipality, north of Cape Town, have taken several strides towards incorporating groundwater into their water supply mix. The search for and use of groundwater resources has often been hindered by the fact that groundwater, in most of South Africa, is stored within fractures in the bedrock, difficult to map and reach. As a result, demonstration projects have been initiated, where Danish groundwater experts assist the South Africans in developing techniques and guidelines for mapping and abstracting the groundwater from the those factures in the bedrock.
In Saldanha Bay municipality, they are currently mixing surface water from the Berg River with groundwater from three wellfields - and have further plans for managed aquifer recharge and desalination. To sustainably manage groundwater resource in integration with existing water supply sources, whilst securing the safety of the Laangebaan/Saldanha Bay area ecosystem, the municipality are aware that knowledge is the necessary basis for all decisions. To obtain that knowledge and undertstanding, they have further mobilised groundwater experts, to survey and provide 3D mapping of an 2400km2 large area. Data is collected by airborne electromagnetic magnetic geophysical method, analysed and modelled by Danish groundwater experts, to aid the municipality in their decision making.