Abstract: “Pakistan is located between latitude 25o and 36o with strong spells of monsoon rains showering from June to September with somewhat variation in showers according to location. Heavy rains in monsoon season make dams, rivers and lakes overflow causing destructive floods. The scenario provoked the study on the estimation of regional rainfall quantiles of Annual Maximum Monsoon Rainfall Totals (AMMRT) of the seven unguaged sites of the Punjab province in Pakistan [1]. The estimates are obtained from L-moment based Regional Rainfall Frequency Analysis (RRFA) [2]. The monsoon data series of the seven sites of northern Punjab were found random and identically distributed with no serial correlation. These results were the output of the run test, lag-1 correlation and Mann-Whitney U test. The L-moment based discordancy measure exposed no site discordant in the group of seven. The heterogeneity measure concluded a homogenous region of the seven sites. The L-moment Ratio diagrams exposed the Gen”

Keywords: L- moments, Regional Rainfall Frequency Analysis, Discordancy Measures, Heterogeneity Measure.