Study on Improvement Design for River Environment Considering Equilibrium between Hydraulics and Ecology in River

（T.KANDA）采用图像测速法（PIV， PTV）和k- epsilon湍流模型对明渠沟槽内的湍流进行了实验和数值分析。研究了沟槽内的瞬时速度、平均速度、雷诺应力等流动结构。在此基础上，讨论了主流沟槽边界大组织涡运动与水力参数的关系。为了了解河流环境的复杂结构，进行了头脑风暴和关键词采样。利用KJ方法和解释结构模型，明确了16个类别的层次结构。然后，运用层次分析法，从政府官员、居民和生物三个方面厘清评价差异。MICHIOKU)在明渠中进行了实验室实验，其中沿水槽交替布置了波纹和水池，关于流动阻力，…更多的水面剖面和速度矢量。在实验中，将阻力系数表示为模型中波纹池布置几何参数的函数。内雅河流域是大阪府的低平原，是快速推进城市化的地区之一。本研究首先通过模型降雨讨论了主要水利设施的防洪效率和可用性，重点研究了蓄水量和洪峰泄洪截流效应的时间依赖特征。在此基础上，从防洪和中水回用两个方面研究了实际控制的可能性。（KANDA）进行了一种天然富余型护岸在高水位逆流作用下的斜角损伤试验。在不同的θ值下，测量了覆盖材料去除临界条件下的流量和速度分布。通过测量护岸的变化来评价护岸的稳定性。利用牛顿第二运动低点，导出了护岸最大冲刷深度的预测值。MIYAMOTO和M.HIGASHINO)将溶解物质从底部沉积物到流动水中的扩散传质模型作为流速和沉积物特征（如沉积物含水量和沉积物中溶解物质的数量）的函数来制定。为了验证所提出的模型，进行了实验室实验。少

(T.KANDA) Turbulent flows in open channel trench are experimentally and numerically analyzed by using image velocimetry (PIV, PTV) and k- epsilon turbulence model. The flow structures, such as instantaneous and mean velocity, Reynolds stress in the trench section, are investigated. Then, the relationship between the large organized eddy motion at the main flow- trench boundary and hydraulic parameters are discussed.(K.NAKATSUJI) In order to understand the complicated structures of river environment, brainstorming and key words sampling are carried out. By using the KJ Method and Interpretive Structure Modeling, the hierarchy structure of 16 categories is clarified. Then, Analytic Hierarchy Process is applied to clarify the differences in the evaluation from the standpoint of government officers, residents and biological aspects.(K.MICHIOKU) Laboratory experiments in open channels where riffles and pools are alternatively arranged along a flume were made with respect to flow resistance, … More water surface profiles and velocity vectors. A drag force coefficient was experimentally formulated as a function of geometrical parameters of a riffle-pool arrangement in the model.(K.MURAOKA) Neya River Basin, the low plain of Osaka Prefecture, is one of the areas where the rapid urbanization has been advanced. This study firstly discusses the efficiency and availability of the main water facilities for flood control by the model rainfall, especially focusing on the time-depend characteristics of water storage and cut-off effect of peak flood discharge. Then the possibility of practical control concerning flood control and water reuse is studied.(K.KANDA) Experiments were carried out on damage of a rich-in-nature type of revetment caused by returning flow from high water course with the oblique angle theta. The discharge and velocity profiles for critical condition of removal of cover materials were measured under the different values of theta. Stability of revetment was also evaluated by measurement of the variations of revetment. Using Newton's second low of motion, a predictor of the maximum scour depth on the revetment was derived.(H.MIYAMOTO and M.HIGASHINO) A model for diffusional mass transfer of dissolved substance from bottom sediment to flowing water is formulated as a function of flow velocity and characteristics of the sediment such as water content of sediment and amount of dissolved substances contained in sediment. Laboratory experiments are carried out in order to verify the proposed model. Less