講演詳細

防災・水文部門[Forest Disaster Prevention and Hydrology]

日付	2026年3月17日
開始時刻	17:00
会場名	405
講演番号	J-10
発表題目	Measurement and modelling of the late winter snow depth over Mt Dairoku in central Hokkaido Measurement and modelling of the late winter snow depth over Mt Dairoku in central Hokkaido
所属	THE UNIVERSITY OF TOKYO
要旨本文	Snow stored beneath forest canopies is vital for spring water supply, yet its depth varies widely with forest structure, terrain, and winter conditions. This study examined snow retention on Mt. Dairoku using plot-scale measurements from the University of Tokyo Hokkaido Forest. We defined a Snow Retention Index (SRI) as the difference between forest and nearby open-site snow depths and modeled it using stand structure, topography, and winter meteorology. Elevation exerted the strongest control on SRI, followed by basal area and aspect―denser stands retained less snow, while higher and east-facing slopes accumulated more. A standardized Meteorological Snow Index from station records effectively captured interannual variation, enabling snow depth predictions for unsurveyed winters. These findings offer a practical framework for forest snow estimation in cold mountain regions.
著者氏名	○Chandrathilake, Guruluwana Gamaethiralalage Thilakawansha1,2 ・ Nobuaki Tanaka1 ・ Yuji Nakagawa3 ・ Tetsuyuki Kobayashi1 ・ Noriyuki Kimura1 ・ Toshiaki Owari1
著者所属	1The University of Tokyo ・ 2Department of Forestry and Environmental Science, University of Sri Jayewardenepura ・ 3Ecohydrology Research Institute, The University of Tokyo
キーワード	forest snow processes, forest hydrology, snow retention, forest structure, Topography
Key word	forest snow processes, forest hydrology, snow retention, forest structure, Topography