Paper
Sensitivity Analysis of Slope Gradient Factor and Vegetation Factor of Region Landslide Based on the RS and GIS Technology
- Authors:
- Hongyang Cao; Zhiguang Li; Yadong Bian
- Abstract
- Sensitivity analysis of Influence factors is a basic research for region landslide field, slope gradient and vegetation coverage is the important thing of all factors. The slope gradient is obtained by the DEM data, which is divided into several zones. The contribution rates of every zone of slope gradient is calculated by GIS technology and the proposed landslide influence factor contribution rate method. The sensitivity analysis between slope gradient and landslide is quantitatively obtained through the above method. It shows the slope gradient among 20ο-30ο is the most sensitive zone. The type of vegetation coverage was classified by remote sensing supervised classification technology. The internal relation between landslides and the type of vegetation coverage was revealed by spatial analysis method of geography information system. Contribution rate of every coverage factor for the landslide was obtained. The conclusion gives the support for the policy of conversion of cropland to forest, and lays a foundation for the research of region landslides prediction. It shows that the technology of remote sensing and geography information system have a special advantage for the sensitivity analysis of region landslides influence factors. This result provides a new idea for assessments of regional landslide hazards and is of great significance to regional geo-hazard planning and prediction.
- Keywords
- remote sensing; geography information system; region landslide; vegetation factors; slope gradient factors
- StartPage
- 65
- EndPage
- 67
- Doi