床止めの侵食制御機構に関する研究

Abstract

It is necessary to know the mechanism of debris control by structures for saboor river regulation, to mitigate a severe river change due to rapid sediment runofffrom creeks with active sediment yield. In this study, the control mechanisms ofgroundsill with narrow crest are taken into consideration. Flume tests areperformed to elucidate such erosion process as variations of stream channels andsediment discharge, in terms of the parameters; groundsill spacings and the width ofcrest. In addition, a mathematical model is developed for evaluating the erosionprocess, and tested by flume data. The mathematical model can be applied toevaluate the effects of groundsills on the erosion process.