Daisuke KATO
Study of Slope Hazard Prediction and Extraction of Factors of Slope Failure during Heavy Rainfall
Satoru OHTSUKA
In recent years, various sediment disasters due to heavy rains have been reported in all parts of Japan. Slope failure is mentioned as a typical sediment disasters due to the rain. The slope is stable when it's sunny. On the other hand, it raining, the slope is collapsed. It is clear from these things that rainfall is one of the factors of slope failure. Due to slope failure in Niigata-Fukushima heavy rainfall in July 2011 and debris flow disaster occurred at Hiroshima City in 2014 in recent years, many precious lives have been lost. Depending on the environment when heavy rainfall has occurred, there”Ēs various forms of damage. However, no matter what form slope failure caused by heavy rainfall is related to the lives of many. Important is to predict the risk of slope failure because heavy rain is occurred frequently in Japan. Moreover highly accurate risk prediction, encourage to save lives of many.
This paper targets to Niigata-Fukushima heavy rainfall in July 2011. In this study do research on slope hazard prediction and extraction of factors of slope failure during heavy rainfall by using GIS. Past studies have continued to developmental risk prediction. Still more unclear mechanism of slope failure, that prediction accuracy will never, not necessarily high. Reveal the mechanism of slope failures to improve the precision risk prediction, is indispensable. Previous studies have many are analyzed for each of these factors using post-mortem failure. Few studies focusing on the terrain. Therefore, noting the locations of slope failures and scale, were analyzed. Extraction of convex and section scanning allowed analysis. In this paper Relationship between topography and slope failure discussed the results of the analysis. Extraction of convex is made for visualization of high risk areas. As a result of section scanning, we discussed the necessity of the position and scale of slope failures.
Please use "previous botton" to return the previous page