International Conference on Rain Water Cistern Systems
"Rainwater Catchment for Future Generations"
Keelung, Taiwan, R.O.C. - August 1991
5: Cistern Management and Operation Guidelines
Optimization Of Ground
Catchments To Maximize Rain Water Collection In South Africa
About 40% of South Africa suffers semi-arid id to arid conditions with annual
rain varying up to 200 mm. People staying in these areas are largely served by
ground water through bore holes for their water needs. Typically the water is
rich in dissolved iron or has an unacceptably high content of salt. The settlements
in these areas, as is often the case, are sparsely distributed making it costly
to import water. This means that the next practical and appropriate source to
develop is rain water which is at the moment only exploited limitedly.
The importance of rain water as an alternative source have already been well
documented elsewhere (e.g. Waller 1989) and will hence been assumed in this paper.
In the past the development of rain water catchment systems in South Africa
has centred largely in the optimization of roof catchment Systems. Significant
breakthroughs have been realized in work on water storage tanks. However, little
has been done to explore the potential for ground catchment systems.,
This paper reports on work done by the Division of Water Technology (CSIR)
to evaluate ground catchments that have been treated with four locally available
materials viz a tar product, paraffin wax graded sand and gravel and gravel covered
sheeting. To date the gravel-covered sheeting method. ha shown the greatest promise
for use because the catchment plots are easy to prepare, the media affordable
and most importantly deliver a reasonably good quality water.
PDF of full document (9pp,
|Note: The IRCSA proceedings
section is still new and under active management, If you find any problems,
ommissions or corrections please contact
the administrator so we can put things right.