| Evaluation of crustal stability in the lower Yellow River region |
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| 作者姓名： | YANG Qinye MA Xin LI Zhizhong XIA Fuqiang |
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| 作者单位： | [1]Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China [2]College of Life ＆ Environment, Xinjiang Normal University, Urumq 830054, China [3]College of Resource and Environment, Xinjiang University, Urumq 830046, China |
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| 基金项目： | The authors would like to thank Profs. Xie Furen, Cheng Lianwan and Yang Guohua for their support and Prof, Sun Ye for offering valuable suggestions. This work was supported by the Preliminary Study on Flood Disaster Risk and Artificial Riverway on Lower Reaches of Yellow River （Grant No. 96-920-09-01）. |
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| 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 among the various factors find out the interrelations 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.
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| 关 键 词： | 地壳稳定性 模糊数学 评估 GIS 黄河下游 水文学 |
| 收稿时间： | 2005-12-16 |
| 修稿时间： | 2005-12-162006-04-30 |
Evaluation of crustal stability in the lower Yellow River region |
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| YANG Qinye MA Xin LI Zhizhong XIA Fuqiang.Evaluation of crustal stability in the lower Yellow River region[J].Chinese Science Bulletin,2006,51(B11):168-177. |
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| Abstract: | |
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| Keywords: | crustal stability fuzzy mathematics evaluation GIS lower Yellow River |
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