The Research on Design, Construction and Operations Management of the Underground dam

地下坝设计、施工及运行管理研究

• 批准号: 10556051
• 负责人: OKA Taro
• 金额: $ 7.94万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10556051/
• 关键词: Underground Dam; Forchheimer's Law; Three Dimensional FEM Model of Seepage; Saline Water Intrusion; Electrical Resistivity Method; Groundwater Level and Abnormal Rainfall; Cokriging; Optimum Estimation Method; 3次元地下水流; 地下水の異常上昇; 塩水楔; 多孔体の抵抗則

The underground dam is one method for water resources development, and especially, it is effective in islands, peninsula and arid regions. In Nansei Islands, Okinawa and Kagoshima Prefectures in Japan, some underground dams are carrying out the construction. In this study, following four items that become important problems in design, construction and operations management of underground dam have been investigated.(1) The Elucidation of Decrease Mechanism of the Pumpage with the Flow Condition Change in the Porous MediaThe viscous flow is analyzed numerically by Semi-Implicit Method for Pressure-Linked Equation to clarify the seepage velocity and pressure distributions around gravels. It is clarified from the calculated results that the relationships between hydraulic gradient and seepage velocity are represented by quadratic polynomial equation (Forchheimer's law). The technique is shown to simulate the groundwater flow around pumping well by using Forchheimer's law.(2) Quantitative P … More rediction of the Rise of the Groundwater Level with the Abnormal Rainfall and Its CountermeasureNumerical FEM model of saturated-unsaturated seepage is developed and applied to an actual underground dam. Three dimension characteristics of groundwater flow overtopping the dam body is obtained and examined.(3) The Research on Saline Water Intrusion of aquifer by Using Electrical Resistivity MethodIn order to clarify the saline water intrusion into the underground dam site, vertical soundings were carried out in costal area of Haruno, Kouchi Pref. and vertical resistivity distributions were obtained. A deep layer of low resistivity was found near coast, and it was concluded to be the layer of saline water. Horizontal distributions of its depth were estimated by conventional curve matching method and newly proposed method with numerical analysis and staodard Powell's method. Its result and validity are shown and discussed.(4) Optimum Estimation Method of Impermeability Basis and Groundwater Level Using Not Sufficient Data SetIn the steps of designing and operations management of underground dam, it is necessary to estimate the impervious basis and groundwater level distributions using not sufficient data set. Here, cokriging estimation techniques are developed to show the groundwater levels and the impervious basis in using the insufficient data set. Cokriging yields reasonable and valid results because it can interpolate less sampling data due to its ability to adequately pick up the available cross-correlation data. Less

地下坝是水资源开发利用的一种方法，特别是在海岛、半岛和干旱地区，地下坝是一种行之有效的方法。在日本南西诸岛、冲绳和鹿儿岛县，一些地下水坝正在建设中。本研究针对地下坝设计、施工及营运管理中的四个重要问题进行探讨。(1)多孔介质中渗流条件变化对抽水量减小机理的解释采用压力耦合方程的半隐式方法对粘性渗流进行了数值分析，得到了砾石周围的渗流速度和压力分布。计算结果表明，水力坡降与渗流速度之间的关系可用二次多项式方程（Forchheimer定律）表示。该技术被证明是模拟地下水绕抽水井利用Forchheimer定律。(2)定量P ...更多信息 异常降雨引起地下水位上升的预测及对策建立了饱和-非饱和渗流的数值有限元模型，并将其应用于某地下坝的实际工程。得到了地下水流漫坝的三维特征，并进行了检验。(3)用电阻率法研究地下水的盐水入侵为了弄清地下水侵入坝址的情况，在口知县春野沿岸地区进行了垂向测深，得到了电阻率的垂向分布。在海岸附近发现了一个较深的低阻层，初步判断为咸水层。用传统的曲线拟合法和新提出的数值分析法及StodardPowell法估算了其深度的水平分布。给出了结果并讨论了其有效性。(4)非充分数据条件下的防渗基础和地下水位最优估计方法在地下坝的设计和运行管理中，需要利用非充分数据条件下的防渗基础和地下水位分布进行估计。在这里，协同克里格估计技术的开发，以显示地下水位和不透水的基础上，使用不足的数据集。协同克里格法能够充分提取可用的互相关数据，因此可以插值较少的采样数据，从而产生合理有效的结果。少

项目成果

Oka, Taro: "Derivation of Forchheimer's law by numerical analysis of viscous flow and its application to ground water simulation"Applied Hydrology, JSIDR. No.10. 36-41 (1997)

Oka, Taro：“通过粘性流数值分析推导福希海默定律及其在地下水模拟中的应用”应用水文学，JSIDR。

岡太郎,石井将幸,大年邦雄: "地下水の利用と保全-高知県春野町における地下水の塩水化に関する実態調査"平成10年度水資源セミナー講演概要集. 第10K-6号. 60-72 (1998)

Taro Oka、Masayuki Ishii、Kunio Ohtoshi：“地下水的利用和保护 - 高知县春野镇地下水盐化的实际情况调查”1998 年水资源研讨会摘要第 60-72 号（1998 年）。

大年,藤原,松田,岡,石井 ほか2名: "電気探査による海岸帯水層の塩淡境界面の推定"京都大学防災研究所共同研究報告書. 11G-7. 44-56 (2000)

Ohtoshi、Fujiwara、Matsuda、Oka、Ishii 等 2 人：“利用电测法估算沿海含水层的咸淡水界面”，京都大学防灾研究所联合研究报告 11G-7（2000）。

石井将幸,岡太郎,大年邦雄: "比抵抗法による電気探査を用いた塩水浸入調査"水工論文集. 第43巻. 187-192 (1999)

Masayuki Ishii、Taro Oka、Kunio Otoshi：“使用电阻率法进行电勘探的咸水入侵调查”水利工程学杂志，第 43 卷，187-192 (1999)

Oka, Taro, Ishii Masayuki and Otoshi, Kunio: "The Field Study on the Salination of the Groundwater in Haruno, Kouchi Pref."Proceeding of Water Resources Seminar. Vol.10K-6. 60-72 (1998)

Oka, Taro, Ishii Masayuki 和 Otoshi, Kunio：“高内县 Haruno 地下水盐化的实地研究”水资源研讨会论文集。