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* 株式会社日水コン環境事業部 〒163-1122 東京都新宿区西新宿 6-22-1 新宿スクエアタワー ** 横須賀「水と環境」研究会 〒239-0803 横須賀市桜が丘 2-4-16 ¶ 連絡先: simizu_y@nissuicon.co.jp Abstract There are five evaluation axes for the "soundness ind icators of water environment" . However, the levels of importance o f each of these ax e s or individual ind icators, which an observer considers , are not the same. In consideration of an investigator's subjectivity, the analytic hierarchy process ( AHP ) technique is proposed as a method of evaluating a water environment synthetically. The structure of subjective judgment , which serves as a backdrop to an investigator's judgment , is analyzed. First, the same subject performs water environmental research at three points of a case river and clarifi es the feature s of each water environment. Subsequently, a hierarchical evaluation factor structure of the soundness index is built. By applying the AHP technique, the result well described subjectivity of the observer , which showed the different tendency from typical method. It is considered that the AHP technique is an effective method of understanding an investigator's feeling explicitly as well as the water environment completely .

Evaluation of Water Environment with AHP Based on "Soundness Indicators of Water Environment"