Abstract
Experiments conducted during the 1990s investigated the feasibility of using fog water to supplement existing water supplies in the arid west coast region of South Africa. Based on these results, a project was initiated aimed at implementing an operational fog water collection system to provide potable water to a small, water-poor rural community. A 70 m2 fog water collector was subsequently erected on the crest of the hill located next to the mission station called Lepelfontein. The volume of water collected was measured by means of a water flow meter and a tipping bucket. An automatic weather station recorded rainfall, wind speed and direction. The data record spans the period September 1999–August 2001. This paper gives a brief overview of the methods used to select the experimental site and describes the design of the fog water collection system. This is followed by a detailed account of the water yields, the contribution of fog and rainfall to the total yield, the characteristics of wet events, the factors associated with water collection and water quality. On average, yields of around 4.6 l of water were collected per square metre of collecting surface per day with maximum daily yields approaching 4000 l. The quality of the water was excellent. It thus appears that fog water collection may have considerable potential as an alternative water source at many other locations on the west coast of South Africa.
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References
DWAF 1986:Management of Water Resources of the Republic of South Africa.South African Department of Water Affairs, Pretoria.
DWAF 1996:South African Water Quality Guidelines for Domestic Use (2nd edn.),South African Department of Water Affairs and Foresty, Pretoria.
Estie K.E.,1984:Forecasting the formation and movement of coastal lows.Paper presented at the Coastal Low Workshop,Simonstown, March 1984,17–27.
Fuenzalida H.,1988:Meteorological aspects of water collection from stratocumuli in northern Chile.Paper presented at the 3rd International conference on Southern Hemisphere Meteorology,Brazil.
Henderson-Sellers A.and Robinson P.,1986:Contemporary climatology. Longman Scientific & Technical, New York.
Heydorn A.E.and Tinley K.L.,1980:Estuaries of the Cape. Part 1: Synopsis of the Cape Coast. CSIR Research Report,380.
Huntley B.J., Siegfried R.and Sunter C.,1989:South African Environments into the 21st Century.Tafelberg,Cape Town.
Kempster P.L., Van Vliet H.R.and Kuhn A.,1997:The need for guidelines to bridge the gap between ideal drinking-water quality and that quality which is practically achievable and acceptable. Water SA 23 (2):163–167.
Kerfoot O.,1968:Mist precipitation on vegetation.Forestry Abstracts 29:8–20.
Lancaster J., Lancaster N.and Seely M.K.,1984:Climate of the central Namib desert.Madoqua 14 (1):5–61.
Linacre E.and Hobbs J.,1977:The Australian climatic environment. John Wiley & Sons, Brisbane.
Lydolph P.E.,1957:A comparative analysis of dry western littorals. Annals of the Association of American Geographers 47:213–230.
Marzol Jaén M.V.,2002:Fog water collection in a rural park in the Canary Islands.Atmospheric Research 64:239–250.
Nagel J.F.,1956:Fog precipitation on Table Mountain.Quarterly Journal of the Royal Meteorological Society 82:452–460.
Olivier J.,1992:Some spatial and temporal aspects of fog in the Namib.South African Geographer 19:106–126.
Olivier J.,1995:Spatial distribution of fog in the Namib.Journal of Arid Environments 29:129–138.
Olivier J.,2002:Fog-water harvesting along the West Coast of South Africa:a feasibility study.Water SA 28 (4):349–360.
Olivier J.and Stockton P.L.,1989:The influence of upwelling extent on fog incidence at Luderitz,southern Africa.International Journal of Climatology 9:69–75.
Olivier,J.and van Heerden J.,1999:The South African Fog Water Collection Project. WRC Report No.671/1/99.Water Research Commission, Pretoria.
Platt A.E.,1996:Confronting infections diseases.In:Brown L.R.(ed.), State of the world 1996.pp.114–132.Earthscan Publications Ltd, London.
Rush K., van Huyssteen M.K.R.and Olivier J.,2000:Patterns of domestic water inadequacy on the South African West Coast. Water SA 26 (4):537–554.
Schemenauer R.S. and Cereceda P., 1991: Fog water collection in arid coastal locations. Ambio 20: 303–308.
Schemenauer R.S. and Cereceda P., 1992: Water from fog-covered mountains. Waterlines 10: 275–290.
Schemenauer R.S. and Cereceda P., 1994: Fog collection's role in water planning for developing countries. Natural Resources Forum 18(2): 91–100.
Schemenauer R.S., Fuenzalida H. and Cereceda P., 1988: A neglected water resource: The Camanchaca of South America. Bulletin of the American Meteorological Society 69: 138–147.
Schutte J.M., 1971: Die onttrekking van water uit die lae wolke op Mariepskop. Technical note No. 20, Division of Hydrological Research, South African Department of Water Affairs, Pretoria.
Shanyengana E.S., Henschel J.R., Seely M.K. and Sanderson R.D., 2002: Exploring fog as a supplementary water source in Namibia. Atmospheric Research 64: 251–260.
Struthers M.J., 1997: Water from Fog Study on the Cape West Coast. Progress report, December 1995 to May 1997. CSIR Report no ENV/S-1 97018.
Toens P.D., Stadler W. and Wullschleger N.J., 1999: The association of groundwater chemistry and geology with atypical lymphocytes (as a biological indicator) in the Pofadder area, North Western Cape, South Africa. Final Report No. K5/839, Water Research Commission, Pretoria.
WHO 1993: Guidelines for Drinking-water Quality. Vol 1: Recommendations (2nd edn.), World Health Organisation, Geneva.
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Olivier, J. Fog harvesting: An alternative source of water supply on the West Coast of South Africa. GeoJournal 61, 203–214 (2004). https://doi.org/10.1007/s10708-004-2889-y
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DOI: https://doi.org/10.1007/s10708-004-2889-y