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dam-l Tree plantations and runoff/LS
The following info is from http://www.soft.co.za/sawac/
It shows how tree plantations reduce runoff.
Does Mono Culture Tree Plantations influence water runoff ?
Consider the Mariepskop example.
The Klaserie River originates at Mariepskop.
The water measurements were taken where the river crosses the road between
Tzaneen and Nelspruit, beneath the mountain.
All that has changed between 1935 and 1964 was a progressive establishment
of mono culture tree plantations in the catchment area.
Mean Annual Rainfall : Mariepskop forestry station (mm)
Mean Annual Run Off : Klaserie River Mariepskop (m2)
1935 - 1964
PERIOD RAINFALL (MM) RUN OFF (M3)
1935-40 1 729 143.07 x 106
1941-45 1 122 48.72 x 106
1946-50 1 332 38.43 x 106
1955-60 2 060 28.72 x 106
1961-64 1 308 16.58 x 106
Source : Van der Schyff H.P. & Schoonraad, E., 1971
"The Flora of Mariepskop" Bothalia 10(3) 461 - 500
Thanks to Prof. Braam van Wyk (UP) for supplying this information.
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Lori Pottinger, Director, Southern Africa Program,
and Editor, World Rivers Review
International Rivers Network
1847 Berkeley Way, Berkeley, California 94703, USA
Tel. (510) 848 1155 Fax (510) 848 1008
http://www.irn.org
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