Identifying Best Probability Distribution for Events of Maximum Rainfall-A Case Study of Karnal, Haryana

摘要

The present study has been undertaken to fit best probability distribution of rainfall of Karnal District representing eastern climatic zone of Haryana state. For the purpose, daily rainfall data of 47 years was analyzed and processed to identify themaximum rainfall received on daily, monthly, seasonal and annual basis. The analysis showed that the maximum daily rainfall among the years ranged between 38 mm (1980) to 229 mm (2009) indicating a very large variation during the period of study. The standard deviation and coefficient of variation were also computed. Different goodness of fit tests were carried out to select the best fit probability distribution on the basis of highest rank with minimum value of test statistic. The probability distribution was identified using maximum overall score based on sum of individual point score obtained from different selected good-ness of fit tests. Generalized extreme value distribution was found to be best fit probability distribution for most of the periods. The results clearly established that the analytical procedure devised and tested in this study may be suitability appliedfor the identification of the best fit probability distribution of weather parameters.