| 基于DEM的活动构造研究 |
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| 引用本文： | 李利波 徐,刚 胡健民 于新兵.基于DEM的活动构造研究[J].中国地质,2012,39(3):595-604. |
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| 作者姓名： | 李利波 徐 刚 胡健民 于新兵 |
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| 作者单位： | 国土资源部新构造运动与地质灾害重点实验室,中国地质科学院地质力学研究所,北京10081 |
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| 摘 要： | 地形地貌参数指标是分析区域活动构造的有力工具。本文以渭河上游流域的活动构造研究为例,通过提取地貌的参数指标,如面积-高程积分(Hi)、流域盆地不对称度(AF)、山前曲折度(Smf)以及谷底宽度与谷肩高度的比值(Vf)、盆地形状指数(Bs)等,然后对地貌参数指标等级进行算术平均化(S/n),可得到区域的相对构造活动程度(Iat),分为:低、中等、高、较高四类等级。研究认为渭河上游流域的构造活动程度相对高(Iat=1.50),这种方法对探讨整个区域活动构造的差异性具有很好的效果和意义。
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| 关 键 词： | 地貌参数 活动构造 构造地貌 DEM 渭河上游流域 |
An analysis of relative active tectonics based on DEM |
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| LI Li-bo,XU Gang,HU Jian-min,YU Xin-bin.An analysis of relative active tectonics based on DEM[J].Chinese Geology,2012,39(3):595-604. |
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| Authors: | LI Li-bo XU Gang HU Jian-min YU Xin-bin |
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| Institution: | LI Li-bo,XU Gang,HU Jian-min,YU Xin-bin(Key Laboratory of Neotectonic Movement & Geohazard,Ministry of Land and Resources;Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China) |
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| Abstract: | Geomorphic indices are useful tools for studying relative active tectonics.This paper presents a new method for evaluating relative active tectonics based on DEM data,using several tectonic geomorphic indexes which include hypsometric integral,drainage basin asymmetry,stream-gradient index,mountain-front sinuosity,valley floor width – valley height ratio,drainage basin shape etc.Iat is an index of relative active tectonics,which is obtained by the average of the different classes of geomorphic indices.The authors divide them into four classes: low,moderate,high,and very high from relatively low to the highest tectonic activity.Exemplified by the upstream region of the Weihe River,the authors consider the drainage is relatively higher tectonic activity(Iat=1.50),and that the method has ideal effects and significance for exploring diversities of relative tectonic activities on an areal basis. |
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| Keywords: | geomorphic index active tectonics geomorphology digital elevation model(DEM) upstream region of the Weihe River |
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