Probability analysis for prediction of annual maximum rainfall of one to five consecutive months for Sultanpur region

Abstract

The present study was conducted for probability analysis of 17 th years (1994-2010) with the prime objective for prediction of annual maximum rainfall of one to five consecutive months Sultanpur region. The maximum rainfall values were estimated by proposed prediction models viz., Gumbel, Log Pearson Type III and Log Normal. The predicted values were compared with observed values and correlation between the predicted and observed values was also established. Rainfall data had been in the above distributions and their corresponding rainfall events were estimated at 5.5, 11.5, 6.6, 33.3 and 50 per cent probabilities level. The goodness of fit models was tested by chi-square. The comparison between the measured and predicted maximum value of rainfall clearly shows that the developed model can be efficiently used for the prediction of rainfall. The statistical comparison by chi-square test for goodness of fit clearly indicates that the Gumbel distribution was found to be best model for predicting two, three, four and five consecutive months annual maximum rainfalls (mm) while Log Pearson types III are fairly close to observed for one and four consecutive months annual maximum rainfall (mm). Rainfall prediction by Log Normal distribution shows very close relation to the observed rainfall for one consecutive months annual maximum rainfall (mm).

Employing the Generalized Pareto Distribution to Analyze Extreme Rainfall Events on Consecutive Rainy Days in Thailand's Chi Watershed: Implications for Flood Management

“…These studies employed maximum likelihood estimation (MLE) and verified model suitability using tests such as the Kolmogorov-Smirnov (KS) test and Anderson-Darling (AD) test. Examples of these studies include (Kwaku and Duke, 2007;Patel et al, 2011;Manikandan and Kumar, 2015;Sabarish et al, 2017) The current study aimed to fill the research gap by examining the consecutive days' maximum rainfall data in Thailand.…”