Abstract

Not only Flood control functions, Water utilizatoin functions but also Functions of River Environment has been to very important. Because of, River environment function has influence on Life environment, Mental climate of human being. Firstly, In the present report, We wish to describe the Water Familiarization Functions. We had divide for form of bank, Materials of bank, Water quality, Water quantity, Bioiogical indicator etc. in environmental factor of River for a Synthetic river environment statement.How to Statement of River environment is methods of numelical system and Principle component analysis. An object of River is 25 rivers in Tokyo and, We had draw maps of Synthetic River environment statement by the charts. As a result of We could extract a preponderant rivers for improvement of river environment and countermeasure of river purification from 25 rivers.

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