基于GF-2的禄丰恐龙谷南缘山地环状构造线性特征遥感解析应用研究

APPLICATION OF REMOTE SENSING ANALYSIS OF LINEAR FEATURES OF CIRCULAR STRUCTURE IN SOUTH OF LUFENG DINOSAUR VALLEY BASED ON GF-2

通过遥感影像观察可以发现禄丰恐龙谷南缘山地构造较为特殊,为了解其特殊地质构造,本文以高分二号GF-2影像为数据源,运用遥感技术,对研究区内山地进行线性特征遥感解析,得到如下结论:(1)研究区内山地的山脊线和山谷线的重心邻近,山脊线和山谷线呈环状分布。山谷线的面积和周长约为山脊线的两倍;(2)研究区内,山脊线和山谷线较标准圆均向西南方向偏移了,由于山脊线和山谷线较标准圆的偏移方向一致,偏移度相似,推测应是受同一外力作用导致的偏移;(3)山脊线内,主要河谷水系整体趋势为由东北方向流向西南方向,水系整体呈放射状,且为封闭水文单元。其水系重心与山脊线重心位置几乎一致;(4)在山脊线与山谷线之间,主要河谷水系多分布在研究区南部。山谷线外,主要河谷水系整体走势为从东北方向流向西南方向。通过本文的应用研究不但可以促进国产高分系列遥感卫星的应用拓展,同时也为遥感地质在山地环状构造方面的研究提供了理论依据。

Through the observation of remote sensing images,it can be found that the mountain structure in the south of Lufeng Dinosaur Valley is special.In order to understand the special geological structure,this paper takes GF-2 image as data,and uses remote sensing technology to analyze the linear characteristics of the mountain in study area.The following conclusions are obtained:(1)The barycenters of the ridge line and valley line of the mountain in study area is adjacent,and the ridge line and valley line are circular distribution.the area and perimeter of the valley line are about twice that of the ridge line;(2)Compared with the standard circle,the ridge line and valley line in the study area have shifted to the southwest.Since the ridge line and valley line have the same migration direction and similar migration degree compared with the standard circle,it is speculated that the migration should be caused by the same external force.(3)Within the ridge line,the overall trend of the main valley water system is flowing from northeast to southwest,and the water system is radial and closed hydrological units.Its barycenter of water system is almost consistent with the geometric barycenter of the ridge line;(4)Between the ridge line and the valley line,the main valley water systems are mostly distributed in the south of the study area.Outside the valley line,the overall trend of the main valley water system is from northeast to southwest.The application research in this paper can not only promote the application expansion of domestic high-resolution remote sensing satellites,but also provide a theoretical basis for the study of remote sensing geology in mountain circular structures.