Evaluation of crustal stability in the lower Yellow River region

被引:0
作者
Yang Qinye [1 ]
Ma Xin
Li Zhizhong
Xia Fuqiang
机构
[1] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
[2] Xinjiang Normal Univ, Coll Life & Environm, Urumqi 830054, Peoples R China
[3] Xinjiang Univ, Coll Resource & Environm, Urumqi 830046, Peoples R China
来源
CHINESE SCIENCE BULLETIN | 2006年 / 51卷
关键词
crustal stability; fuzzy mathematics; evaluation; GIS; lower Yellow River;
D O I
10.1007/s11434-006-8168-1
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
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.
引用
收藏
页码:168 / 177
页数:10
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