Assessment of the potential adoption of infield rainwater harvesting technique in the communal farming areas of the upper and middle Modder River Basin, South Africa

Urban Farm DB summary

A study in the communal farming areas of the upper and middle Modder River Basin, South Africa, assessed the potential for adopting an infield rainwater harvesting (IRWH) technique developed by the Agricultural Research Council's Institute for Soil, Climate and Water. The technique significantly increased crop yield over conventional practice, and homestead-level adoption grew from six to more than 950 households. An estimated 80,667 hectares in the study area were suitable for IRWH, of which about 14,500 hectares lay in communal farming areas. A participatory field survey of 21 randomly selected villages found strong positive motivators, such as increased crop yield and household food availability, but also strong demotivators — high levels of poverty, limited family labor, lack of tools, and lack of fences around community gardens leading to theft and animal damage. These demotivators were judged strong enough to prevent significant expansion of IRWH beyond the homestead scale, and the expected impact on downstream water availability was therefore judged minimal.