抄録
The probability distributions of water quality in eutrophic lake and in a polluted river are estimated by order statistics with 60 samples. The data are collected by the Depertment of the Water of Chiba Prefecture in Lake INBA and in KANNOU RIVER in april 1976-March 1980. The distributions can be classified into three types which are normal, lognormal and exponential distributions. The goodness of fit of the probability density functions are tested by means of Kolmogorov-Smirnov tests.
