Development of Water Quality Improvement Operation of Reservoir Water by artificially Circulating the Impounded Water

人工循环蓄水水库水质改善工程的开展

• 批准号: 03555118
• 负责人: KANDA Tohru
• 金额: $ 4.29万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03555118/
• 关键词: Reservoir Dynamics; Field Survey; Density Currents; Water Quality; Environment; Numerical Model; Artificial Control; Circulation; Water Quality; Density Current; Thermal Stratification; Mixing; Temperature Measurement; Turbulence; Circulatio

The results obtained in the present research program are briefly summarized as follows.Kanda experimentally examined the water quality improvement by pumping up the bottom layer fluid and showering it to the water surface from above. He devised a physical model system in order to simulate such a situation. By using salt and fresh waters as working fluids. Kinematic and dynamic behaviors of the plunging fluid mass are carefully examined. Based on a dimensional argument, dimensionless parameters governing water mass dynamics are obtained. Mixing and diffusion processes of water mass are analyzed by using these parameters. Based on the experimental results he proposed empirical formulas for predicting water quality transportation which is applicable to the phenomena in prototype reservoirs.Yano made laboratory experiment to investigate high efficiency of water improvement operation by discharging the surface water onto thermocline interface. We term this method "internal circulating opera … More tion". The bottom layer fluid is entrained across the thermocline due to penetration and rebound of discharging fluid. He experimentally obtained an entrainment relationship in this system. Applying the entrainment law and taking momentum and mass conservation principles into consideration, he constructs a analytical model to predict water quality variation sue to the internal circulating operation.Michioku carried out a field survey of internal wave motion in a stratified reservoir to examine their dynamics under the wind action on water surface. Stochastic analysis on internal behaviors in the stratified water body is performed to find out relationship between wind shear mechanism and internal wave reaction. A theoretical consideration based on the internal wave dynamics is also made to describe the internal wave motions. The observed modal structure and stochastic properties of wave fields are successfully reproduced by our analysis.Muraoka examined the role of wind shear stress on water quality behaviors by making a laboratory experiment in by means of an open channel installed in a wind tunnel. He found dynamics of the thermocline setting up motion, the resultant upwelling of bottom water and the vertical entrainment process. Also performed is a feasibility study to construct coastal structures to control the wind stress action on the impounded water behaviors so that the water quality can artificially be controlled.Nakatsuji formulated a three dimensional numerical model the water mass and quality beahviors. His model is applicable to water bodise with complicated three dimensional lake bottom geography. He verified the model by making case studies in which water dynamics and qualities in clased bays and inland waters are successfully predicted. He also devised a visualization technique of the numerical results so that we could easily understand hydraulic behaviors of water quality factors. Less

本研究项目取得的成果概括如下：神田实验研究了将底层液体抽上来，从上方喷淋到水面的水质改善效果。他设计了一个物理模型系统来模拟这种情况。通过使用盐和新鲜沃茨作为工作流体。的运动学和动力学行为的暴跌流体质量仔细检查。基于量纲参数，得到了控制水团动力学的无量纲参数。利用这些参数分析了水团的混合扩散过程。根据实验结果，提出了适用于原型水库的水质输运预测经验公式。矢野进行了室内实验，研究了将地表水排放到温跃层界面的高效改水作业。我们称这种方法为“内循环歌剧 ...更多信息 ”。由于排放流体的穿透和反弹，底层流体被夹带越过温跃层。他通过实验获得了这个系统中的夹带关系。应用卷吸定律，并考虑动量和质量守恒原理，构建了预测内循环运行引起的水质变化的分析模型。田奥进行了分层水库内波浪运动的现场调查，研究了水面风作用下的波浪运动。对分层水体的内部行为进行了随机分析，找出了风切变机制与内波反应之间的关系。基于内波动力学的理论考虑也被用来描述内波运动。我们的分析成功地再现了观测到的波场的模态结构和随机特性。村冈通过安装在风洞中的明渠进行实验室实验，研究了风切应力对水质行为的作用。他发现了跃层建立运动的动力学，由此产生的底层水的上涌和垂直夹带过程。此外，还进行了可行性研究，建设海岸结构，以控制风应力作用于蓄水行为，从而可以人工控制水质。Nakatsuji制定了三维数值模型的水团和质量beahviors。该模型适用于具有复杂三维湖底地形的水体。他通过案例研究验证了该模型，成功地预测了clased海湾和内陆沃茨的水动力学和水质。他还设计了一种数值结果的可视化技术，以便我们可以很容易地理解水质因子的水力行为。少

项目成果

真嶋 政彦・神田 徹・道奥 康治: "貯水池水温の現地観測と鉛直混合現象に関する考察" 土木学会第46回年次学術講演会. 46. 710-711 (1991)

Masahiko Mashima，Toru Kanda，Koji Michio：“水库水温的现场观测和垂直混合现象的考虑”第46届日本土木工程学会学术年会46。710-711（1991）。

尹 錘星・中辻 啓二・村岡 浩爾・伊藤 渉: "江田島湾の水温構造の数値シミュレ-ション" 平成4年度土木学会関西支部年次学術講演会. II-100- (1992)

Yoon Yoon、Keiji Nakatsuji、Koji Muraoka 和 Wataru Ito：“江田岛湾水温结构的数值模拟”日本土木工程学会关西分会 1992 年学术会议 II-100- (1992)。

T.Sueyoshi, H.Yamami, K.Nakatsuji and K.Muraoka: "Coastal Waters Exchange through Akashi Strait" Proc.Annual Meeting, Kansai Chapter, JSCE. II-84 (1992)

T.Sueyoshi、H.Yamami、K.Nakatsuji 和 K.Muraoka：“通过明石海峡的沿海水域交换”Proc.年会，关西分会，JSCE。

神田 徹,道奥 康治,真嶋 政彦: "貯水池の水温構造に関する調査研究" 建設工学研究所報告. 33. 127-163 (1991)

神田彻、道雄浩司、真岛正彦：《水库水温结构研究》建筑工程研究所报告33. 127-163（1991）。

尹 鍾星, 中辻 啓二,伊藤 渉,村岡 浩爾: "閉鎖性水域における鉛直一次元水温モデルに関する一考察" 水工学論文集. 37. (1993)

Jong-sung Yun、Keiji Nakatsuji、Wataru Ito、Koji Muraoka：“封闭水域垂直一维水温模型的研究”水利工程学杂志 37。（1993）。