河川事業に資する生態水理学の現状と課題～適切な物理的撹乱状態の管理に向けて～

抄録

For proper managements of river/stream, understanding the processes of ecosystem and environments is needed. In this review, current status and problems of eco-hydraulics for river/stream managements are discussed toward regulation of intermediate disturbance. Topics on forestation in gravel bar and invertebrate ecosystem are focused in relation to the prominent effects of physical disturbance on the ecosystem. Common characteristics for both ecosystems are that community composition changes dynamically by physical disturbance. Classification and generalization are needed for solving river management problems related to forestations. Compared to current research status for forestation, the problems have bee still remained for understanding the process related to invertebrate community dynamics. Two kinds of approaches are recommended. One is the paradigm sift of hydraulics with temporal and spatial scales because of the small scale phenomenon of invertebrate dynamics. Another is the comprehensive approach for generalizing ecosystem dynamics related to physical disturbance.