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The Mdumbi estuary
(31°56' S;
29°13' E)
is situated south of the coastal town of Port St Johns on the Transkei coast of the Eastern Cape. This system drains a catchment area of approximately 2 338 sq. km. Approximately 19% of the land-cover in the Mdumbi catchment was agriculture. This comprised mainly subsistence farming with some commercial forestry. Very little of the catchment was degraded (less than 1%) and this consisted of degraded grassland. A large proportion (77%) of the Mdumbi catchment was natural, comprising mainly grassland, bushland, and forest. About 4% of the land-cover consisted of residential (rural) development.
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