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Comparison of Five Distributions for Suitability in Flood Frequency Analysis in Bangladesh
Conference proceeding

Comparison of Five Distributions for Suitability in Flood Frequency Analysis in Bangladesh

Jahir Uddin Chowdhury and Md Abdul Karim
Proceedings of the International Conference on Hydrology and Water Resources, New Delhi, India, December 1993, pp.567-575
Water Science and Technology Library
International Conference on Hydrology and Water Resources (New Delhi, India, 12/1993)
1996
DOI: https://doi.org/10.1007/978-94-011-0389-3_37

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Abstract

Hydrology
A study has been conducted to compare five distributions used in flood frequency analysis in Bangladesh. The distributions are Log-normal, Gumbel, Generalized Extreme Value, Pearson Type 3 and Log-pearson Type 3. Comparisons have been based upon at-site root mean square error in fit, at-site probability plot correlation coefficient, regional L-moment ratio diagrammme, regional distribution of L-coefficient of skewness and regional distribution of largest normalized discharges. The study indicates that the Generalized Extreme Value distribution represents the statistical behaviour of observed annual maximum discharges best. Pearson Type 3 and Gumbel distributions are not suitable for frequency analysis of discharge data in Bangladesh.

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