Abstract
In research of River water quality, It is important that examination of the average or representative water quality so that we can find solution for water environmental problem by complicated factor. Data of river water quality has stocked to date in many regions but the accuracy of these data is uncertainty in measurement. So it is difficult to weigh each basin's loadings. In this study, use Electric conductivity; easily be measured, to calculated relational expression for major inorganic ion and hydrological variate. In addition, use water quality data of Telemeter to multiple classification analysis and estimate of logical river water quality dynamism in the three years past in Asa-River, Tokyo.
