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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 6
First page : (1309) Last page : (1316)
Article doi: : http://dx.doi.org/10.18782/2320-7051.7189

Analysis of Extreme Rainfall Events and Calculation of Return Levels using Generalised Extreme Value Distribution

M. R. Namitha¹* and V. Ravikumar²

¹Assistant Professor, Department of Agriculture Engineering, Sethu Institute of Technology, Anna University
¹ Professor and Head, Department of Soil and Water Conservation and Agricultural Structures,
Tamil Nadu Agricultural University
*Corresponding Author E-mail: namithamadhu93@gmail.com
Received: 6.11.2018 | Revised: 10.12.2018 | Accepted: 16.12.2018  

 ABSTRACT

The analysis of 27 years rainfall data of Kumulur region was conducted using two types of probability distributions, viz Gumbel distribution and generalised extreme value distribution. The method of L- moments was used for the analysis. Annual one day maximum and 2, 3,4, 5 and 7 consecutive days maximum rainfall data for 27 years was analysed and the return levels for 2, 5, 10 and 25-years were calculated using the proposed probability distribution functions. Chi-square test was conducted for comparison of the observed and expected return levels obtained using both the distributions. The statistical analysis revealed that, the annual maxima rainfall data for one day maxima and consecutive days maxima of Kumulur region fits best with the generalised extreme value distribution.

Key words: Generalised Extreme Value distribution, Gumbel distribution, Chi-square test, L-Moments.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Namitha, M. R. and Ravikumar, V., Analysis of Extreme Rainfall Events and Calculation of Return Levels using Generalised Extreme Value Distribution, Int. J. Pure App. Biosci.6(6): 1309-1316 (2018). doi: http://dx.doi.org/10.18782/2320-7051.7189