An easy-to-use equation is presented for calculating the variance of a design flood estimated using a generalised Logistic (GLO) distribution with model parameters estimated using single site analysis as described in the Flood Estimation Handbook. The equation is applicable for return periods in the range T=2 to T=1000 years and for annual maximum flood series with L-skewness in the interval -0.45≤t3≤0.45 which is considered representative of most UK flood data and practical uses.
Original languageEnglish
JournalProceedings of the ICE - Water Management
Publication statusAcceptance date - 13 May 2021

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