Measurement of velocity and direction of groundwater flow and development of groundwater observation system in 1-order basin.

一级盆地地下水流速、方向测量及地下水观测系统开发。

• 批准号: 59860015
• 负责人: OHTA Takehiko
• 金额: $ 5.18万
• 依托单位: Tokyo University of Agriculture and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1984
• 资助国家: 日本
• 起止时间: 1984 至 1985
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-59860015/
• 关键词: groundwater; 1-order basin; current meter; runoff process; source area; unsaturated infiltration; パイプ流

1. We have developed a tracer-type current meter which can be used in a boring hole. when a solution with different specific resistance from groundwater's is put in the boring hole it is carried by the groundwater flow. Therefore, the velocity and the direction of the groundwater flow are known by measuring the change of voltages between a center terminal and each of 12 terminals on the circle.2. To investigate the mechanism of a drainage system in a bottomland of 1-order basin, a field observation were carried out. 47 observation wells were installed for measuring groundwater levels and the velocity and the direction of the groundwater flow in the bottomland were measured with the current meter built as a trial. The results are as follows:(1) The velocities of the groundwater flow are in 5-18 cm/day.(2) Most of rainwater is drained not through the soil matrix but through the pipe network which is mainly laid along the boundary between deposit and bedrock.3. To observe and analyze the behavior of groundwater, we have designed a simple computer system which is composed of a tablet as a input device from recording charts, technical computer (HP Model 16) and output devices (a printer and a plotter). Using the system, we can obtain some kinds of hydrological graphs such as groundwater level map, overlandflow hydrograph, hydraulic head field map and so forth.

1。我们已经开发了一个示踪剂电流计，可以在无聊的孔中使用。当将与地下水具有不同特异性电阻的溶液放入无聊的孔中时，地下水流动。因此，通过测量中心端子之间的电压变化以及圆上的12个端子中的每个端子中的每个端子的变化来知道地下水流的速度和方向。2。为了研究1阶盆地底地中排水系统的机制，进行了野外观察。安装了47个观察井，用于测量地下水水平，并用当前仪表作为试验来测量底层地下水的速度和方向。结果如下：（1）地下水流量的速度为5-18 cm/天。（2）大部分雨水不是通过土壤基质来排干的，而是通过管道网络排出，该管道主要沿着沉积物和基德岩之间的边界铺设。3。为了观察和分析地下水的行为，我们设计了一个简单的计算机系统，该系统由平板电脑组成，作为录制图表，技术计算机（HP Model 16）和输出设备（打印机和绘图器）的输入设备。使用该系统，我们可以获得某些水文图，例如地下水级图，Overlandflow水文图，液压头部图等。

项目成果

砂防学会研究発表会概要集. (1985)

萨博学会研究报告摘要集（1985）。

Bulletin of the Experiment Forests (Tokyo Univ. of Agric. and Technol.). 22. (1986)

实验森林通报（东京农工大学）。

東京農工大学演習林報告. 22号. (1986)

东京农工大学实验林报告书第 22 号。（1986 年）