特集： ダム構造物の影響 Feature: influences of dam structure
序文 PREFACE BY THE FEATURE EDITOR

ダム影響評価の背景と課題−特集を編集するにあたって−

中村 太士

北海道大学大学院農学研究科森林管理保全学講座 〒060-8589 札幌市北区北9西9

Futoshi NAKAMURA: Background and future problems on influences of dam structure as an introduction of the special feature. Ecol. Civil. Eng. 2(2), 101-102, 1999.

Editor of the feature, Department of Forest Science, Graduate School of Agriculture, Hokkaido University, Nishi 9, Kita 9, Sapporo 060-8589, Japan

Abstract:The experimental flood from Glen Canyon Dam in spring 1997 and Columbia basin program to bring back salmon in the 1980s initiate a new era of dam management in the United Sttes. Conservation and improvement of river environment was included in the purpose statement of the new River Raw in Japan, which was revised in 1997. Reservoir dams, erosion control dams and other dam structures are thought to have considerable effects on the structure and function of river ecosystem, but very few studiesin Japan have demonstratively elucidated such effects. In order to provide present knowledge on influences of dam structure, studies in Japan and other countries were reviewed from the viewpoints of hydraulics, geomorphology, riparian forest dynamics, water quality, benthic animals and fish life history. We believe that the idea of Adaptive Management will be useful as a future management strategy within a limited knowledge of dam influences.

Key words: dam, experimental flood, river ecosystem, Adaptive Management, dam influence

1999年10月1日受理, 1999年10月2日受理
e-mail: nakaf@for.agr.hokudai.ac.jp