Regional flood frequency analysis in the kwazulu-natal province, South Africa, using the index-flood method

T. R. Kjeldsen; J. C. Smithers; R. E. Schulze

doi:10.1016/S0022-1694(01)00520-0

Regional flood frequency analysis in the kwazulu-natal province, South Africa, using the index-flood method

T. R. Kjeldsen, J. C. Smithers, R. E. Schulze

Research output: Contribution to journal › Article › peer-review

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Abstract

A regional frequency analysis of annual maximum series (AMS) of flood flows from relatively unregulated rivers in the KwaZulu-Natal province of South Africa has been conducted, including identification of homogeneous regions and suitable regional frequency distributions for the regions. The study area was divided into two homogeneous regions based on an index of monthly rainfall concentration. Region 1 covers the coastal and midlands area and Region 2 the west north-western parts of the study area. The General Normal, Pearson Type 3 and General Pareto distributions were found to be suitable for AMS of flood flows in Region 2. The occurrence of a few flood events of extreme magnitude in Region 1 resulted in no suitable regional frequency distribution for this region.

Original language	English
Pages (from-to)	194-211
Number of pages	18
Journal	Journal of Hydrology
Volume	255
Issue number	1-4
Early online date	28 Nov 2001
DOIs	https://doi.org/10.1016/S0022-1694(01)00520-0
Publication status	Published - 2 Jan 2002

Keywords

Index-flood
L-moments
Regional flood frequency analysis
South Africa

ASJC Scopus subject areas

Water Science and Technology

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10.1016/S0022-1694(01)00520-0

Cite this

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abstract = "A regional frequency analysis of annual maximum series (AMS) of flood flows from relatively unregulated rivers in the KwaZulu-Natal province of South Africa has been conducted, including identification of homogeneous regions and suitable regional frequency distributions for the regions. The study area was divided into two homogeneous regions based on an index of monthly rainfall concentration. Region 1 covers the coastal and midlands area and Region 2 the west north-western parts of the study area. The General Normal, Pearson Type 3 and General Pareto distributions were found to be suitable for AMS of flood flows in Region 2. The occurrence of a few flood events of extreme magnitude in Region 1 resulted in no suitable regional frequency distribution for this region.",

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AB - A regional frequency analysis of annual maximum series (AMS) of flood flows from relatively unregulated rivers in the KwaZulu-Natal province of South Africa has been conducted, including identification of homogeneous regions and suitable regional frequency distributions for the regions. The study area was divided into two homogeneous regions based on an index of monthly rainfall concentration. Region 1 covers the coastal and midlands area and Region 2 the west north-western parts of the study area. The General Normal, Pearson Type 3 and General Pareto distributions were found to be suitable for AMS of flood flows in Region 2. The occurrence of a few flood events of extreme magnitude in Region 1 resulted in no suitable regional frequency distribution for this region.

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Regional flood frequency analysis in the kwazulu-natal province, South Africa, using the index-flood method

Abstract

Keywords

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