2013 Fiscal Year Final Research Report

New prediction method for mountainous collapse points by the characteristics of trees on the groundwater path

Research Project

Project/Area Number	23580222
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Forest science
Research Institution	Forestry and Forest Products Research Institute
Principal Investigator	TADA Yasuyuki 独立行政法人森林総合研究所, 関西支所, 主任研究員 (40397518)
Project Period (FY)	2011 – 2013
Keywords	崩壊 / 水みち / 樹木 / 樹高
Research Abstract	A method to estimate the groundwater concentration points using the tree height was developed to accurately predict the mountainous collapse point. We compared the height and diameter of Japanese cypresses on and off the groundwater paths. The tree height and diameter on the groundwater paths were large compared to off the paths. Next, we conducted a high-density survey of laser system in artificial forest of cedar, and compared the relationship of the collapse risk terrain and height trees distribution. As a result, we have succeeded in extracting the location of tall trees and rich groundwater in part of the zero-order basin, landslide morphology, and fault topography. By this study, it is possible to extract specific point of rich groundwater in the wide mountains area by an index tree height.