A Review of Groundwater Observation Methods for Slow-Moving Landslide
A Review of Groundwater Observation Methods for Slow-Moving Landslide
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DOI：
10.13101/ijece.15.7
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发表时间：
2022-08
期刊：
影响因子：
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通讯作者：
K. Yokoyama;F. Imaizumi;T. Egusa
中科院分区：
文献类型：
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作者：
K. Yokoyama;F. Imaizumi;T. Egusa
了解滑坡区地下水动态对边坡稳定性数值分析和防治工程规划具有重要意义。本文总结了滑坡体内地下水和地下水流入量的观测方法，并将其分为直接观测和间接观测两类。地下水位观测和地下水测井等直接方法可以揭示地下水位的时空变化和地下水流层的深度。直接方法仍然是了解滑坡区地下水动态的核心。然而，用这些方法获得的信息仅限于所调查的地点。近年来，间接方法得到了显著的发展。在工作人员难以进入或发生大型山体滑坡的陡峭山区，航空电磁测量可以快速提供大范围的地下水信息。此外，量化地下水流声以确定地下水流路径的方法已投入实际使用。虽然间接方法具有提供大范围信息的优点，但它们存在错误识别或忽略地下水的风险。直接法和间接法可以取长补短。直接法和间接法相结合，可以在成本和劳动力方面有效地提供大面积地下水时空分布的详细信息。这使得更准确地分析滑坡滑动和更有效的滑坡防治工程的建设。
Knowing the groundwater dynamics in landslide areas is very important for numerically analyzing slope stability and for planning countermeasure works. This review summarized the observation methods of groundwater within the landslide mass and groundwater inflow into it and classified them into direct and indirect methods. Direct methods such as groundwater level observation and groundwater logging can reveal the temporal and spatial fluctuations of the groundwater level and the depths of groundwater flow layers. The direct methods are still central for understanding groundwater dynamics in landslide areas. However, the information obtained with the methods is limited to the location surveyed. Indirect methods have been remarkably developed in recent years. Airborne electromagnetic surveys rapidly provide wide-area groundwater information in steep mountainous areas where workers are difficult to enter, or large landslides occur. In addition, a method of quantifying the sound of groundwater flow to determine the flow paths of groundwater has been put to practical use. Although the indirect methods have the advantage of providing information in wide areas, they have the risk to misidentify or overlook groundwater. Direct methods and indirect methods can complement each other’s shortcomings. The combination of direct and indirect methods can provide detailed information on spatiotemporal groundwater distribution over wide areas efficiently in term of cost and labor. This enables a more accurate analysis of landslide sliding and more effective construction of landslide countermeasure works.