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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Morphometric analysis and tectonic interpretation of digital terrain data: a case study
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Morphometric analysis and tectonic interpretation of digital terrain data: a case study

机译：数字地形数据的形态分析和构造解释：一个案例研究

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摘要

Tectonic movement along faults is often reflected by characteristic geomorphological features such as linear valleys, ridgelines and slope-breaks, steep slopes of uniform aspect, regional anisotropy and tilt of terrain. Analysis of digital elevation models, by means of numerical geomorphology, provides a means of recognizing fractures and characterizing the tectonics of an area in a quantitative way. The objective of this study is to investigate the use of numerical geomorphometric methods for tectonic geomorphology through a case study. The methodology is based on general geomorphometry. In this study, the basic geometric attributes (elevation, slope, aspect and curvatures) are complemented with the automatic extraction of ridge and valley lines and surface specific points. Evans' univariate and bivariate methodology of general geomorphometry is extended with texture (spatial) analysis methods, such as trend, autocorrelation, spectral, and network analysis. Terrain modelling is implemented with the integrated use of: (1) numerical differential geometry; (2) digital drainage network analysis; (3) digital image processing; and (4) statistical and geostatistical analysis. Application of digital drainage network analysis is emphasized. A simple shear model with principal displacement zone with an NE-SW orientation can account for most of the morphotectonic features found in the basin by geological and digital tectonic geomorphology analyses.
机译：沿断层的构造运动通常反映为特征性的地貌特征，例如线性谷，山脊线和坡折，均匀纵横比的陡坡，区域各向异性和地形倾斜。通过数字地貌学对数字高程模型进行分析，提供了一种识别裂缝和定量表征区域构造的方法。这项研究的目的是通过案例研究来探讨数值地貌方法在构造地貌中的应用。该方法基于一般的几何形态。在这项研究中，基本的几何属性（高程，坡度，坡度和曲率）与山脊线和谷线以及表面特定点的自动提取相辅相成。 Evans的一般几何形态的单变量和双变量方法通过纹理（空间）分析方法进行了扩展，例如趋势，自相关，光谱和网络分析。地形建模是通过综合使用以下内容来实现的：（1）数值微分几何; （2）数字排水网络分析; （3）数字图像处理; （四）统计和地统计分析。强调数字排水网络分析的应用。通过地质和数字构造地貌分析，一个具有主位移带NE-SW方向的简单剪切模型可以解释该盆地的大部分构造特征。

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