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Catchment |
  
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Catchment |
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National Water Act Definition Catchment in relation to watercourse or watercourses or part of a watercourse, means the area from which any rainfall will drain into the watercourses or part of a watercourse through surface flow to a common point or points. [Source: National Water Act (Act No. 36 of 1998)] Synonyms Basin Watershed Description The area from which water - which could include both surface and subsurface water - drains towards a common point. The surface and subsurface catchment areas may not coincide. The extent of catchment areas is defined by hydrological divides. This is a term essentially used by surface hydrologists. Why are catchments important? Catchments are a basic hydrological unit. The quaternary catchment is the basic unit for water resource management in South Africa.
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