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There is a growing South African literature concerning the impact of water and other
infrastructure projects on the environment (see the bibliographic database). Reference is
made, for example, to the ecological implications of inter-basin water transfers (Petitjean
and Davies, 1988)*; the ecological effects of stream regulation by dams on the Palmiet
River, western Cape (Byren and Davies, 1988)"; the ecological investigation of
proposed dams in the Umfolozi Game Reserve (Porter, 1978)*", and the effects of
works construction and water withdrawal from the Muzi Pan near St lucia (Anonymous,
1988 - see Table J34 below). Such data are mostly site specific, where various checklists
and matrices are presented, or the impacts discussed.
Table J34: Components of the environmental impact assessment matrix for the
proposed Muzi Pan irrigation scheme.
•
Proposed actions which may cause environmental impacts
1. Planning and pre-construction phase
Site meetings
Site surveys
Soil surveys
2. Construction phase
Site clearing
• Control structures
Low level weir with control gate at Mkuze River "breakaway" point
Inlet culverts to Muzi Pan
Outlet pipe from Muzi Pan
Training berm
Control gate on channel to Tshanetshe Pan
Control structure on outlet from Tshanetshe Pan -
Trenching
Pipe laying
Backfilling
Borrowpit excavations
Embankments
*.
•••
See Petitjean, M. and Davies, B., 1988. Ecological impacts of inter-basin water transfers - a case
study, the Orange River project, The Naturalist, VOl 33{11, p. 27 - 33. See also, Petitjean, M.O.G.
and Davies, B.R., 1988. A review of the ecological and environmental impacts of inter-basin water
transfer schemes in southern Africa: synthesis (Part 1) and international bibliography (Part 2),
Ecosystem Programmes Occasional Report Series No. 38, Foundation for Research Development,
CSIR, Pretoria, 106 p.
See Byren, BA. and Davies, B.R., 1988. Some aspects ofthe ecological effects of stream regulation
by dams on the Palmiet River, western Cape, The Naturalist, VOl 33(1), p. 37 - 44.
See Porter, R.N.. 1978. Ecological investigation ofdams inthe Umfolozi Game Reserve, Public Works
Construction and Transport, April 1978, p. 15-17,21. (The above topics have also been addressed
in the more formal journals - see the bibliographic database).