講演詳細

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

日付	2025年3月22日
開始時刻	ポスター発表
会場名	学術交流会館（ロビー）
講演番号	PJ-35
発表題目	Plot-scale hydrological and sediment disconnectivity associated with windthrown logs in the Eastern Italian Alps Plot-scale hydrological and sediment disconnectivity associated with windthrown logs in the Eastern Italian Alps
所属	Free University of Bozen-Bolzano
要旨本文	Windstorms are major forest disturbance agents in the European Alps where post-storm salvage logging is extensively adopted to minimize economic losses. However, due to the lack of long-term monitoring data, little is known about how windthrown logs influence hydrological and sediment connectivity. We monitored and compared water and sediment fluxes from salvaged/unsalvaged 27 m2 plots after the 2018 Vaia Storm in the Eastern Italian Alps. During 46 summer storms between 2021 and 2024, the log-covered unsalvaged plot showed 31 minutes longer mean time to runoff collection and 49% lower mean sediment yield compared to the salvaged plot, indicating lowered hydrological and sediment connectivity due to windthrown logs. Our empirical evidence, coupled with runoff-erosion simulations, implies persistent effects of legacy deadwood on hillslope runoff and erosion dynamics after major forest disturbances.
著者氏名	○Kenta Koyanagi1,2 ・ Andrea Andreoli1 ・ Giovanna Nordio1 ・ Ronald Pöppl2 ・ Francesco Comiti1,3
著者所属	1Faculty of Agricultural, Environmental and Food Sciences, Free University of Bozen-Bolzano ・ 2Department of Geography and Regional Research, University of Vienna, University of Vienna ・ 3Department of Land, Environment, Agriculture and Forestry, University of Padova
キーワード	Forest disturbance, Plot-scale monitoring, Soil erosion modeling
Key word	Forest disturbance, Plot-scale monitoring, Soil erosion modeling