River system in Japan from a landscape ecological aspect

The objective of this study was to elucidate characteristics associated with rivers by classification of major rivers in Japan into severaltypes based on riparian conditions.As the results of principal component analysis (PCA) with use of parameters reflecting forms and artificialalterations of respective rivers, four major components such as "comprehensive riparian size", "intactness of water front", "continuity ofstreams" and "simplicity of landform in river basin" were extracted.Subsequently, cluster analysis was performed based on principal componentscores, leading to successful classification of major rivers into 6 types.These findings disclosed that ( 1 ) the extracted principal componentsprovide effective viewpoint for classification of rivers; (2) distribution of respective classes indicates area properties; and (3) the employedquantitative procedures were found effective for classification of major rivers.

作 者： Nobukazu Nakagoshi Masahito INOUE   作者單位： Graduate School for International Development and Cooperation, Hiroshima University, 1-5-1 Kagamiyama, Higashi-Hiroshima, 739-8529,Japan  刊 名： 環境科學學報(英文版)  ISTIC SCI 英文刊名： JOURNAL OF ENVIRONMENTAL SCIENCES  年，卷(期)： 2003 15(2)  分類號： Q149  關鍵詞： river system   landscape ecological aspect   Japan  

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