SUGGESTING BEST FITTING DISTRIBUTION FOR ESTIMATING FLOOD FOR RIVER SARDA AT UTTARAKHAND, INDIA

Estimates of flood frequency quantiles are important in planning and design of water reource structures, Hence there is a need to seek for the most appropriate design estimator that would meet both safety and economic considerations of such structures. Flood frequency analysis is a tool used to estimate the frequencies of likely an occurrence of future floods. The objective of study is to estimate flood parameters of Sarda River of Uttarakhand, for different return period using statistical approaches, screening test using Anderson’s Correlogram, Chow test for Outlier Detection and Kendall’s Rank Correlation. Goodness of Fit tests Chi-square test, D-Index and K-S tests are applied to all the chosen, six probability distributions namely Normal, Log normal, Pearson type III, Log Pearson type III, Gumbel, Log Gumbel distributions using method of moments. By applying Model efficiency test, Coefficient of determination, root mean square errors for distributions and to suggest for best fitting distribution for Sarda River.