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北海道北部の雪崩発生地における森林造成

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Title: 北海道北部の雪崩発生地における森林造成
Other Titles: Reforestation on snow avalanche site in northern Hokkaido
Authors: 松田, 彊1 Browse this author
矢島, 崇2 Browse this author
澁谷, 正人3 Browse this author →KAKEN DB
Authors(alt): MATSUDA, Kyo1
YAJIMA, Takashi2
SHIBUYA, Masato3
Keywords: 雪崩
積雪移動
雪崩対策工
森林造成
snow avalanche
avalanche control
snowcreep
structures
reforestation
Issue Date: Mar-1999
Publisher: 日本雪氷学会
Journal Title: 雪氷
Journal Title(alt): Journal of the Japanese Society of Snow and Ice
Volume: 61
Issue: 2
Start Page: 139
End Page: 147
Publisher DOI: 10.5331/seppyo.61.139
Abstract: 毎年,全層雪崩が発生するササ地に,雪崩の防止と自然景観の復元を目的として樹木の植栽を行った.方法はササの刈り払いと木杭の打ち込みを行い,その後,トドマツ,アカエゾマツ,カラマツ属2種を植栽した.結果は,ササの除去と杭打ちによって,毎年発生していた雪崩は一時的に抑えられ,その間に植栽した苗木は順調に生育し森林が復元されつつある.施工以後,雪崩は一度も発生しなかった.植栽後19年を経た調査では,カラマツ類は平均樹高12m,アカエゾマツは4m,トドマツで7mに達していた.特にアカエゾマツ区とトドマツ区では,雪崩などの影響で成長が抑制されていたミズナラ,シナノキなどの広葉樹も成長を回復し樹高約7mとなり,針広混交林へと変化している.以上の結果から,積雪斜面への樹木の導入方法を総合的に考察した.
Tree saplings were planted in 1977 on a slope covered by Sasa bamboo in the Teshio Experiment Forest of Hokkaido University to prevent snow avalanches occuring every year and to restore the natural landscape of the slope. Before the planting, Sasa densely covering the slope was pruned away and short wood stakes were rammed in the upper part of the slope, and saplings of Abies, Picea and two species of Larix were planted in the slope. Then the slope was protected from snow avalanches in the following years, probably by effects of sasa-clearing and wood stakes, and the growth of saplings resulted in the reestablishment of a forest stand. After 19 years of the planting, mean heights of Larix, Abies and Picea attained 12, 7 and 4 m, respectively. Avalanches on the slope never occurred from 1978 to the present. Natural broad-leaved trees such as Quercus and Tilia species, which were inhibited their growth by the avalanche, also regained vigorous growth and attained their maximum height over 7 m. Present small patches on the slope are mixed stands of conifers and braodleaved trees. An overall discussion is given on the introduction method of trees to the slope with deep snow, especially from aspects of landscape restoration and expected costs.
Rights: © 公益社団法人 日本雪氷学会
© The Japanese Society of Snow and Ice
Type: article
URI: http://hdl.handle.net/2115/70789
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 澁谷 正人

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