著者

早川 典生 河原 能久 後藤 巌

出版者

長岡技術科学大学

雑誌

長岡技術科学大学研究報告 (ISSN:03885631)

巻号頁・発行日

vol.7, pp.35-41, 1985-09-20

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The overturning of a motor vehicle passing along Route 8 at Yoneyama along the Japan Sea coast is reported to have occurred on 29 October, 1976, due to a strong onshore wind. This paper reports a model study aimed to elucidate the mechanism of this incident. The model terrain and vehicle were scaled down to one to 30. Wind velocity, pressure distribution along the terrain as well as model vehicle are measured, and the drag and lift force and the overturning moment of the model vehicle are calculated. The result of the study points to the possibility of studying the mechanism of overturning accident.

著者

野々村 敦子 森本 茂昭 河原 能久 野間 京二

出版者

土木学会

雑誌

水工学論文集 (ISSN:09167374)

巻号頁・発行日

vol.49, pp.1147-1152, 2005-02

被引用文献数

3

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Oxygen levels in eutrophic water bodies can become rapidly depleted at the presence of stable thermal stratification. The anoxic condition induces the release of nutrients and heavy metals from bottom sediments, leading to water quality problems. In Goten reservoir, we installed two sets of jet flow generator. One jet flow generator transports the water near free surface and eject it near the bottom while the other discharges pumped groundwater near the bottom. Field measurement has been carried out to understand the destratification process by the induced flow and the resultant changes in water quality. It is demonstrated that the jet flow generators accelerate the destratification process considerably and that the spatial distribution of water quality in a horizontal plane shows little difference during the process. It is also found that further improvement with the jet flow generators is necessary to increase more effectively the dissolved oxygen concentration near the bottom.