Original Articles: 2014 Vol: 6 Issue: 6
The application of GIS software in geo-hazard risk evaluation in Huangling County
In order to design geo-hazard prevention and control planning better, according to a detailed investigation of geo-hazard information, the geological environment conditions and the characteristics of geo-hazard in Huangling County were detailed analyzed, GIS software is applied to determined and quantify the geo-hazard evaluation index, the weights were gotten using a method combining the qualitative analysis with quantitative calculation, geo-hazard risk was evaluated in weighted sum method. The results show that the high-risk areas mainly distributed in Luohe River valley area, Juhe River valley area and Nanchuan River valley area. The areas have great resident population, frequent movement of floating, fast urbanization and strong human engineering activities. The high-risk and middle-risk geo-hazards are widely developed. The risk evaluation result is consistent with the actual situation, and is credible. After contrast the evaluation result with the actual investigation, it can be found that the evaluation result has good agreement with the actual investigation.