Rainwater harvesting systems in Nigeria vary in terms of design and operation. To better understand common practice and motivation for collecting rainwater, a questionnaire survey was selected to achieve a representation of the population of Ibadan. A sample size of 1067 was calculated for household respondents (using a population of 2,555,853). 950 households responded to the survey. The survey questions focused on catchment materials, uses for the harvested water, water policy and strategy, water supply and environmental health. Result indicates that corrugated iron sheet is the most commonly used roofing materials for rainwater harvesting (RWH). The most commonly reported use for harvested rainwater was cooking and drinking although greater than 75% of the respondents use their rainwater for potable purposes. 77% of the respondents had no water supply from the public main while less than 25% receive supply. Of the respondents, approximately 61% have a low yield of supply from well sources during the dry season while 39% have supply. Thus, the prevalence of water-borne diseases, in which 61% reported typhoid fever, 19% diarrhea and 17% cholera. Over 60% of the population depend on well water for their supply while 23% rely on borehole and as low as 6.6% harvest rainwater traditionally as a source. In particular, the low reliance on rainwater and the need for an alternative water supply system should be investigated further as the number of RWH systems installed in Nigeria continues to grow.
Omolara Lade, University of Ibadan, Nigeria
David Oloke, University of Wolverhampton, UK
Stream: Environmental Sustainability & Human Consumption: Food and Water
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