Study on the influence of grid size on landslide susceptibility prediction in hilly region:a case study of Yongjia county of Zhejiang province
Taking Yongjia county of Zhejiang province as an example,the correlation between the influence factors of landslide disaster and the size of grid is analyzed,and the information model method is used to realize the landslide disaster susceptibility zoning.The results show that the selection of grid has great influence on prediction of results of the factors of slope and rainfall in hilly areas,but little influence on prediction of results of the factors of engineering rock group,slope direction and traffic line.Taking into account the calculation efficiency and accuracy,the grid of 200 meters should be selected for the prediction of landslide susceptibility in low mountain and hilly areas.The main factors affecting landslide prediction in different regions are not the same,so the grid size should be reasonably determined according to the actual situation.The size of grid is very important to the prediction of landslide susceptibility.In the future,we will continue to carry out the research of landslide in the high and steep terrain area,which will have certain practical significance to improve the overall prediction accuracy of landslide susceptibility.
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