scholarly journals Performance of regional flood frequency analysis methods in KwaZulu-Natal, South Africa

Water SA ◽  
2015 ◽  
Vol 41 (3) ◽  
pp. 390
Author(s):  
JC Smithers ◽  
J Streatfield ◽  
RP Gray ◽  
EGM Oakes
Keyword(s):  
South Africa ◽  
Frequency Analysis ◽  
Flood Frequency ◽  
Flood Frequency Analysis ◽  
Analysis Methods ◽  
Regional Flood Frequency Analysis ◽  
Kwazulu Natal ◽  
Regional Flood Frequency

scholarly journals Assessing the performance of regional flood frequency analysis methods in South Africa

Water SA ◽  
2018 ◽  
Vol 44 (3 July) ◽  
Author(s):  
JJ Nathanael ◽  
JC Smithers ◽  
MJC Horan
Keyword(s):  
South Africa ◽  
Frequency Analysis ◽  
Relevant Literature ◽  
Flood Frequency ◽  
Flood Frequency Analysis ◽  
Design Flood ◽  
Regional Flood Frequency Analysis ◽  
Design Floods ◽  
Regional Flood Frequency ◽  
Better Than

In engineering and flood hydrology, the estimation of a design flood associates the magnitude of a flood with a level of exceedance, or return period, for a given site. The use of a regional flood frequency analysis (RFFA) approach improves the accuracy and reliability of estimates of design floods. However, no RFFA method is currently widely used in South Africa, despite a number of RFFA studies having been undertaken in Africa and which include South Africa in their study areas. Hence, the performance of the current RFFA approaches needs to be assessed in order to determine the best approaches to use and to determine if a new RFFA approach needs to be developed for use in South Africa. Through a review of the relevant literature it was found that the Meigh et al. (1997) method, the Mkhandi et al. (2000) method, the Görgens (2007) Joint Peak-Volume (JPV) method and the Haile (2011) method are available for application in a nationwide study. The results of the study show that the Haile method generally performs better than the other RFFA methods; however, it also consistently underestimates design floods. Due to the poor overall performance of the RFFA methods assessed, it is recommended that a new RFFA method be developed for application in design flood practice in South Africa.

Sign in / Sign up

Export Citation Format

Share Document