Fig. 4From: An application of extreme value theory to the management of a hydroelectric damDiagnostic plots for GP fit to the Akosombo water level data. The top panel shows the plots for negated monthly minimal water levels; the bottom panel shows the plots for monthly maximal water levels. In addition, the leftmost column shows the QQ-plots; middlemost column shows the PP-plots; and the rightmost column shows the density estimates superimposed on the histogram of dataBack to article page