ダム堆砂データに基づく日本全国の潜在的侵食速度分布

概要

論文の詳細を見る
In order to improve the way to evaluate landslide potential, we proposed a new method to obtain a distribution of specific sedimentation rate, which gives information on regional erosion rate. First, several topographic indices were compared with specific sedimentation rates. We found that an average grid slope was the best index to estimate specific sedimentation rate. Based on a regression analysis, we obtained equations to estimate specific sedimentation rate using simple parameters : grid slope and surface geology contained in a GIS database "Japan Engineering Geomorphologic Classification Map (JEGM)". The estimation error of specific sedimentations using our proposed model is smaller than those using previous models. Using the equations and the JEGM, we mapped the potentials of specific sedimentation rate in every drainage basin all over Japan.
日本自然災害学会の論文
2005-11-30