应用浅层地温测量法分析崩岗侵蚀与地下水分布关系

地下水是影响崩岗发生的重要驱动力之一,而地温场异常可以反映反推地下水分布。在野外调查的基础上,利用浅层地温法反演流动地下水脉分布的原理,分析并探讨了粤东五华典型崩岗侵蚀区的地下水分布、流向及与崩岗分布的空间关系。结果表明：地下水脉复杂多变的区域,其崩岗侵蚀程度也越严重。这种关系主要表现在3点：（1）较活跃和集中分布的崩岗侵蚀群常具有更多的浅层地温冷点;（2）零散分布的单个崩岗体,其水脉形态常呈不连续性,且总体流动方向较均一,与崩岗前进方向相反;（3）在崩岗群中,地下水脉则呈树枝状或网状展布。应用浅层地温法间接探讨崩岗侵蚀与地下水分布关系,是研究崩岗侵蚀过程与机理的新手段,具较好的应用前景。

Application of shallow earth temperature survey in investigating the relationships of spatial distribution between the typical weathering slope collapse and groundwater

Ground water is an important triggering factor for collapse,while anomalies of ground temperature field can reflect distributing environment of ground water.Based on shallow earth temperature survey,we investigated the relationships of spatial distribution between the typical weathering slope collapse and groundwater in wuhua.The results showed that：firstly,the more shallow earth cold-point a weathering slope had the more possibility it could collapse.Secondly,the flow direction of groundwater in slope collapse was generally against that of collapse proceeding and the flow was discontinuous.Thirdly,the veins of groundwater were dendritic or reticular distribution in slope collapse group.These points indicated that the intensity of collapse is closed correlated to complex distribution of ground water vein.It is a new and utility tool to explore the mechanism and process of weathering slope collapse indirectly by applying shallow temperature survey.