Review: Methods for the estimation of extreme rainfall events

  • KA Johnson 1. Centre for Water Resources Research, University of KwaZulu-Natal, Pietermaritzburg, South Africa; 2. Civil Engineering, School of Engineering, University of KwaZulu-Natal, Durban, South Africa
  • JC Smithers 1. Centre for Water Resources Research, University of KwaZulu-Natal, Pietermaritzburg, South Africa; 2. Bioresources Engineering, School of Engineering, University of KwaZulu-Natal, Pietermaritzburg, South Africa; 3. JG Afrika, Hilton, Pietermaritzburg, South Africa; 3. National Centre for Engineering in Agriculture, University of Southern Queensland, Toowoomba, Australia
Keywords: design rainfall, extreme events, estimation methods, probable maximum precipitation, South Africa

Abstract

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.

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Published
2019-07-31