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	Evaluation of crustal stability in the lower Yellow River region
	Ma X.
	2006
关键词	crustal stability fuzzy mathematics evaluation GIS lower Yellow River
英文摘要	The evaluation of crustal stability in the lower Yellow River region (LYR) is vital to the engineering project of the Yellow River embankment and construction of the Huang-Huai-Hai plain. From three aspects of tectonic stability, surface stability and medium stability, this paper analyzes in detail the factors such as tectonic activity, tectonic stress, exogenic geologic disasters and ground material composition which affect crustal stability in the study area and the spatial distributions of subordinate degree of the evaluation factors. It then constructs the crustal stability evaluation model of fuzzy mathematics based on GIS by using AHP to find out the interrelations among the various factors, comprehensive evaluation of fuzzy mathematics and the functions of spatial overlay and spatial database of ArcGIS. Based upon this the crustal stability evaluation is carried out, the results show that the areas of stable and instable regions are basically the same, being 48.72% and 51.28% respectively. The area of moderate stable region takes a dominant position, being about 70.58%. The crust instable region presents zonal distribution and under the control of tectonic faulted belt. But the region where the LYR runs across is mostly instable with a total length of the river being 568.345 km, or 78.93% of all. The river reach where the crustal stability is relatively poor along the LYR is concentrated in the Lankao-Dongping section.
出处	Chinese Science Bulletin
卷	51
页	168-177
收录类别	SCI
语种	英语
ISSN号	1001-6538
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/22586]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Ma X.. Evaluation of crustal stability in the lower Yellow River region. 2006.

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