Abstract
For clarifying the effects of sand supply on the down stream riffle of Futase-Dam, field survey data at two locations on bed material and invertebrate composition from autumn to early spring were analyzed. Downstream site has more distinct trend to shift smaller particle size distribution after the sand supply. During winter season, from autumn to early spring, changes in invertebrate community showed different temporal pattern before and after the sand supply. The downstream site has clearer tendency not to increase in the abundance of net-spinning caddis-worms, but to increase in the species which can escape from flood disturbance. The particle size distribution before sand supply affects the change in flood season and movement of small size particle at small flood event from autumn to next spring. The possible movement time of small particle size is greatly changed with the sand supply amount and the location.
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Schedule a callMore From: Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)
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