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The Mngazana estuary
(31°42' S;
29°25' E)
is situated south of the town of Port St Johns on the Transkei coast of the Eastern Cape. This system drains a catchment area of approximately 285 sq. km. Approximately 21% of the Mngazana catchment was under agriculture. Most of this comprised subsistence farming with some commercial forestry also present. About 24% of the catchment was degraded, mostly degraded grassland and bushland. Natural bushland, grassland and forest accounted for approximately 54% of the land-cover. Roughly 1% of the land-cover comprised residential (rural) development.
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