Analysis of Farmland by Visualizaiton Technique

利用研制的地下水动态监测装置，对地下水坝周围地下水动态进行了监测。在实验中，使用细玻璃珠模拟了带有倾斜亚克力板基底的地面。实验装置的表面是透明的亚克力，这使我们能够在垂直的二维剖面上观察地下水剖面。在上边界处控制流入量恒定，在下边界处保持水位恒定。利用该装置进行了地下水绕坝渗流试验，并通过高速摄像观测了地下水流剖面。利用本研究所开发的图像处理系统对视频录像进行分析，获得地下水运移的详细信息，并在本研究所开发的工作站上采用克里格法对地下坝流域内的地下水位分布进行了评价。另一方面，利用铝杆进行陷门实验，并通过同一系统分析视频记录，以获得位移分布和空隙的变化。

The groundwater behavior around underground dam is monitored by the experimental device developed in this research project. In an experiment, the ground with a declined basement of Acryl board is modeled by using fine glass beads. The surface of the experimental device is a transparent Acryl which allows us to observe the groundwater profile in a vertical two-dimensional section.Inflow at the upper boundary is controlled so as to be constant and the water level is kept constant at the lower boundary. An experiment of seepage flow around the underground dam is carried out by the above device and the profile of groundwater flow is observed with a high-speed video. Monitored record on the video is analyzed by the image processing system developed in this research project to obtain detailed information on the transfer of groundwater.The distribution of groundwater level within the underground dam basin is evaluated by the Kriging technique on the work station in the system of the current research project. Trap-door experiment using aluminum rods, on the other hand, is performed and the video record is also analyzed through the same system to obtain the displacement profile and the change of voids.