This thesis also review the correlation between discharge (cusec),rainfall (mm), gauge (ft.), daily minimum temperature (℃) and daily maximum temperature (℃) by using R statistical analysis software. The correlation matrix for the above multiple parameters also made for Swat region using Pearson, spearmen and Kendell correlation methods in R. This study also explain the correlation of rainfall vs discharge and gauge vs discharge for 2010 flood by using R. Correlations and graphical view of different statistical data produced different set of functions in R, these functions may be used for another river of the same features.

Keywords : Flood frequency analysis, Gumbel and extreme value theory type-1, Pearson, spearman and Kendell methods for correlation, Swat river annual peak discharge.