ABSTRACT
The probability weighted moments are defined by Greenwood et al. The conventional Moment Ratio Diagrams (MRDs), the L–moment ratio diagrams are based on relationships between the L–moment ratios. The sample L–moment ratios plot as fairly well separated groups and permit better discrimination between the distributions. The identification of a parent distribution can be achieved much more easily by using L–moment ratio diagrams than conventional MRDs, especially for skewed distributions. Hosking and Wallis give two statistics which are used to test regional homogeneity. The first statistic is a discordancy measure, intended to identify those sites that are grossly discordant with the group as a whole. The second statistic is a heterogeneity measure, intended to estimate the degree of heterogeneity in a group of sites. The stations were divided into four subregions according to their geographical location: the upper Wabash basin, the middle Wabash basin, the east fork White River basin, and the west fork White River basin.
