The Combined Use of Surface Nuclear Magnetic Resonance and Self-potential in the Research of Groundwater State in the Landslide
-
摘要: 地下水的空间分布及运移规律是建立地下水流系统和分析渗流场规律的重要因素。具有直接找水特性的地面核磁共振方法（SNMR）可以用于确定地下水的空间分布，而自然电场法（SP）是一种可以探测地下水流动方向的物探方法，这两种方法的联合使用为地下水研究提供了一种较好的工作模式。本文以滑动带水体探测为例，阐述该工作模式的应用效果。首先，通过SNMR方法得到地下含水量和纵向弛豫时间（T1）的空间分布，并利用我们所总结的半定量公式进一步计算得到地下空间滑动面存在的概率。然后，采用SP方法的环型观测方式，对滑带内地下水的流向进行测量。这两种方法的综合探测结果为滑坡地下水模型的建立提供更加全面的水文地质信息，证明这两种方法综合应用的有效性。Abstract: The spatial distribution and migration pattern of groundwater are important factors to establish groundwater flow system and analyze the seepage field. The SNMR method which is the only geophysical method that can detect groundwater directly can be used to determine the spatial distribution of groundwater, while the SP method is a geophysical method that can detect the flow direction of groundwater. The combined use of these two methods provides a better working pattern for the detection of groundwater. In this research, the detection of landslide groundwater was taken as an example. According to the water content and T1 time distribution obtained by SNMR method, using the semi-empirical method we proposed, the probability value of the slip surface in the underground space could be calculated, and then got the distribution of the slip surface. The flow direction of groundwater in landslide could be measured by the circular observation method of SP method. The combined results of the two methods provided more comprehensive hydrogeological information for the establishment of landslide groundwater model and also certified the effectiveness of the comprehensive application of the two methods.
-
Keywords:
- surface nuclear magnetic resonance /
- self-potential /
- groundwater /
- landslide
-
计量
- 文章访问数: 419
- HTML全文浏览量: 9
- PDF下载量: 13
下载:
