Original Research

Standard residential flood damage functions for South African conditions

Gawie de Villiers, Giel Viljoen, Herman Booysen
Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie | Vol 26, No 1 | a122 | DOI: https://doi.org/10.4102/satnt.v26i1.122 | © 2007 Gawie de Villiers, Giel Viljoen, Herman Booysen | This work is licensed under CC Attribution 4.0
Submitted: 21 September 2007 | Published: 21 September 2007

About the author(s)

Gawie de Villiers, Navorsingsgenoot, Departement Geografie, Universiteit van die Vrystaat, Posbus 339, Bloemfontein, South Africa
Giel Viljoen, Landbou ekonomie, Universiteit van die Vrystaat, Posbus 339, Bloemfontein, South Africa
Herman Booysen, NETGroup, Bloemfontein, South Africa

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Abstract

Disaster risk management is an integral part of a scientific approach to disaster management. It refers to integrated, multi-sectoral, multi-disciplinary, organizational and operational planning processes and skills to mitigate disasters. Application of the approach necessitates disaster risk analysis, requiring flood damage functions in the case of floods. A flood damage function can be described mathematically, tabularly or graphically and refers to the relationship between flood characteristics like depth and/or speed of floodwater and flood damage to a specific land use type. Research conducted at the University of the Free State indicated the value of standard residential flood damage functions and the necessity for periodic updating to secure contemporary relevance. This article focuses on updating of the latter. The article starts with an introduction to put the development, use and maintenance of standard residential flood damage functions in context with regard to the latest views on disaster risk management, risk assessment, disaster management legislation in South Africa and a computer model TEWA, in which the flood damage functions are used. Aspects that can affect flood damage are briefly discussed, followed by sections on the development and upgrading of structural flood damage functions for formal housing as well as functions for determining damage to housing contents. The development of residential flood damage functions that can be applied nationally forms the main part of the paper and is followed by a brief summary statement.


Keywords

Residensiële vloedskade; vloedskadefunksies; verliesfunksies; ramprisiko- bestuur

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