基于地理信息与综合信息模型的区域库岸边坡稳定性评价方法

通过地理信息系统(geographic information systems,GIS)与综合信息模型相结合的方法,进行区域库岸边坡稳定性综合评价。通过在研究区域内选取坡向、坡度、山体阴影、高程、地质构造、地层岩性、河流作用7项对库岸边坡稳定性有影响的指标,建立库岸边坡稳定性评价指标体系,然后利用GIS对各个因素进行栅格化,依据综合信息模型,得出基于栅格单元的评价指标分布图,对区域库岸边坡进行稳定性评价。对某工程水库区的区域库岸边坡稳定性进行评价,结果表明:地质构造和地层岩性对评价结果的影响最为显著,且大部分研究区域处于稳定性较低区,其中稳定性低和较低区占总研究区域面积的比例分别为15. 2%和51. 5%,稳定性评价结果精度高达95. 41%。

Regional Bank Slope Stability evaluation Based on Geographic Information Systems and Integrated Information Model

This paper combined the Geographic Information Systems and the integrated information model to evaluate the stability of the regional bank slope. First, a regional bank slope stability evaluation index system was established through studying 7 selected factors (slope, slope direction, mountain shadow, elevation, stratigraphic lithology, geological structure and river action) that have an impact on the stability of the slope. Then, the distribution of evaluation indicators was obtained based on rasterized factors selected and the integrated information model to evaluate the stability of the regional bank slope. Through the analysis of an actual project, it was concluded that the geological structure and stratum lithology have a significant impact on the evaluation results. Most of the research areas were in the relatively low stable areas. The Low and the relatively low stable areas accounted for 15.2% and 51.5% of the total study area respectively. The accuracy of slope evaluation results in the study area reached 95.41% in the study area.