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Water SA

On-line version ISSN 1816-7950
Print version ISSN 0378-4738


JOHNSON, KA  and  SMITHERS, JC. Methods for the estimation of extreme rainfall events. Water SA [online]. 2019, vol.45, n.3, pp.501-512. ISSN 1816-7950.

The estimation of design rainfalls is necessary to estimate the exceedance probabilities of extreme floods required to design hydraulic structures and to quantify the risk of failure of these structures. New approaches to estimating extreme rainfall events are being developed internationally. This paper reviews methods for estimating design rainfalls, particularly extreme events, in South Africa and internationally, and highlights the need to update methods used for estimating extreme rainfall events in South Africa as a platform for future research.

Keywords : design rainfall; extreme events; estimation methods; probable maximum precipitation; South Africa.

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