South Africa is located in a predominantly semi-arid part of the world, with an annual rainfall of ca. 450mm; almost half the global average of 860mm.
To meet the country’s growing water requirements, water resources are highly stressed in large parts of the country. Most river systems have been significantly altered as a result of dams and weirs, the removal of water and return flows to rivers, as well as the impacts of irresponsible land use. In many instances this has resulted in a severe degradation of the quality of water, the integrity of aquatic life in rivers and the well-being of dependent rural communities. Anticipated further industrialisation and urbanisation will result in even greater stress on water resources and increased conflict between different water-use sectors, basic human needs and the needs of a healthy environment.
The stress placed on South Africa’s scarce water resources has resulted in more than 84% of mainstream freshwater ecosystems being classified as ‘threatened’ in a recent national survey. We have also destroyed at least 50% of our existing wetlands through poor land-use practices. In response to this, South Africa has set a policy target of maintaining or restoring at least 20% of each freshwater ecosystem type in a ‘natural state’ and to afford these ecosystems with the highest level of protection possible.
To meet this target, significant effort will need to be put into the rehabilitation of degraded ecosystems as well as securing the protection of that handful of ecosystems that are still in a natural state.