堰からの越流による河床洗掘および堆積に関する実験的研究

概要

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Riffles and pools have important roles for a river ecology and river environment. It is useful to develop a method for creation of riffle and pool. Our final goal is a development of technical method for creation of riffles and pools by means of over flow from weir. As first stage of it, we have studied that the characteristics of scours created by over flow from a sharp crested weir and an inclined weir. The main results of this study are as follows; (1) The maximum scour depths by the inclined weir are small compared with ones by the sharp crested weir when the gradients of inclined weir are mild. However, ones by the inclined weir approach ones by the sharp crested weir as the gradient of inclined weir become steep. (2) The maximum scour lengths by the inclined weir are large compared with ones by the sharp crested weir when the gradients of inclined weir are mild. (3) The scour depths in front of the weir by the inclined weir are large compared with ones by the sharp crested weir when the gradients of inclined weir are steep.
山口大学工学部の論文