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地貌信息熵在震后泥石流危险性评价中的适用性分析
Alternative TitleApplicability of Geomorphic Information Entropy in the Post-earthquake Debris Flow Risk Assessment
王钧; 欧国强; 杨顺; 季宪军; 陆桂红
Corresponding Author欧国强
2013-01
Source Publication山地学报
Volume31Issue:1Pages:83-90
Other Abstract地貌信息熵可以表示流域地貌面受侵蚀的程度,是判断地貌发育演化阶段的量化指标之一。基于流域系统地貌信息熵的原理和方法,采用GIS技术和Matlab、SPSS软件,对"5·12"汶川地震后都江堰市深溪沟流域内41个子流域的面积-高程积分值和地貌信息熵进行计算,研究了各个子流域的地貌发育演化基本特征和泥石流发育情况,并将分析结果和地震后野外实际调查的成果进行了对比研究,结果表明:在烈度为Ⅺ的都江堰深溪沟地震重灾区,地震引发的大量崩塌、滑坡导致松散固体物质广泛堆积于沟道内,不仅为泥石流提供丰富的物源,而且使沟道局部的地貌发生了突变,但通过"地貌信息熵"这种方法无法表达丰富物源的变化和沟道地貌的突变,因此,根据地貌信息熵判断地震后泥石流的危险性具有一定的局限性。为了使地震区泥石流危险性评价的结果更加真实、可靠与可信,必须结合流域的实际情况,对地貌信息熵判定的危险性结果进行综合分析与修正,或者通过多种评价方法进行对比论证和分析。; Geomorphic information entropy can be used to express the erosive degree of the watershed geomorphic surfaces, which is one of the quantitative indicators to judge the evolution stage of landform development. Based on principles and calculation methods of geomorphic information entropy, this article used GIS technology, mathematics (Matlab)and statistics software (SPSS)to calculate hypsometric integral value and geomorphic information entropy of the 41 sub-basins in the Du Jiangyan Shenxi gully watershed, studied landform development characteristics of overall basin and each sub-basin, explored debris flow development situation of each sub-basin channel, and compared with the field survey after the earthquake. The results showed that debris flow risk assessment based on the geomorphological information entropy value was no longer applicable in the Du Jiangyan Shenxi gully stricken by Wenchuan Earthquake, because loose solid materials increased dramatically caused by collapses and landslides led the debris flow risk increased, which needed to improve the method or establish new debris flow risk evaluation model for earthquake stricken areas.
 
Keyword泥石流 面积-高程积分 地貌信息熵 危险性评价
Indexed ByCSCD
Language中文
Funding Organization国家自然科学基金重点项目(40830742)
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6669
Collection山地灾害与地表过程重点实验室
Recommended Citation
GB/T 7714
王钧,欧国强,杨顺,等. 地貌信息熵在震后泥石流危险性评价中的适用性分析[J]. 山地学报,2013,31(1):83-90.
APA 王钧,欧国强,杨顺,季宪军,&陆桂红.(2013).地貌信息熵在震后泥石流危险性评价中的适用性分析.山地学报,31(1),83-90.
MLA 王钧,et al."地貌信息熵在震后泥石流危险性评价中的适用性分析".山地学报 31.1(2013):83-90.
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