著者

伊藤 英之 脇山 勘治 三宅 康幸 林 信太郎 古川 治郎 井上 昭二

出版者

特定非営利活動法人 日本火山学会

雑誌

火山 (ISSN:04534360)

巻号頁・発行日

vol.50, no.6, pp.427-440, 2005

参考文献数

27

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The Yakedake volcano is located in the southern part of the northern Japan Alps, central Japan. Yakedake volcanic hazard map was published in March 2002, and in June 2002, it was distributed to the inhabitants of Kamitakara village, Gifu prefecture, where is located 4-20km west from the volcano. In January 2003, the questionnaire survey was carried out on the inhabitants in order to know their attitudes to the volcanic hazard map and the level of their understanding of the contents of the hazard map. The Kamitakara village office distributed the questionnaires to 1,102 families through the headman of each ward, the headman collected 802 answers. The results of analysis were as follows. 89% of the respondents knew the existence of the hazard map and 35% read it well, but about 11% have not read the map at all. The elders have a tendency to have deeper understanding of the hazard map than younger ones, especially in elders who have experiences to meet some kinds of natural hazards. And the people who once attended the explanatory meeting of the hazard map, which was held for the residents living inside the disaster-prone area four times after the publication of the hazard map, also tend to have more proper understandings. The people who are engaged to the tourism give more attention to the volcanic hazard than others. The respondents have strong tendency to require more knowledge about the volcanic activities and hazards. We can say that the further activities by scientists, engineers and administrative officers are expected in order to establish an informed consent, that is, there should be a decision-making by inhabitants themselves and support by officers in charge with detailed explanations.

著者

小見山 章 井上 昭二 石川 達芳

出版者

一般社団法人日本森林学会

雑誌

日本林學會誌 (ISSN:0021485X)

巻号頁・発行日

vol.69, no.10, pp.379-385, 1987-10-25

被引用文献数

3

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岐阜県荘川村の落葉広葉樹林で, バンド型デンドロメータを25種の落葉広葉樹に装着して1985年度の肥大生長の季節的過程を樹種間で比較した。肥大生長の過程を単純ロジスチック曲線に当てはめたところ, 19樹種はこの関係をほぼ満足した。他の6樹種はいずれも小径木にデンドロメータを装着したために, 測定結果のばらつきが大きかった。同曲線のパラメータから肥大生長の開始時期と終了時期, 生長速度が極大となる時期, および生長の立上りの緩急の程度を求めた。その結果, 肥大生長の開始時期はキハダの4月16日が最も早くミズキの6月7日が最も遅かった。ミズナラ, コナラ, クリなどの環孔材樹種の開始時期は散孔材樹種のそれよりも早かった。生長速度が極大となる時期はキハダの6月8日が最も早かったが, 他の樹種のそれは7月の梅雨期に集中していた。生長期間はミズキの81日間が最も短くミズナラの171日間が最も長かった。当地の落葉広葉樹は生長期間が長くしかも緩生長を行う樹種群と, 生長期間が短く急生長を行う樹種群とに分けられた。