力の作用高さ，生存・枯死，生育場所からみた三陸海岸黒松の被害条件

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  • Damage Condition of Black Pine Tree on the Sanriku Coast against Tsunamis Viewed from Action Height of Horizontal Force, Life-Death and Growth Place
  • チカラ ノ サヨウ タカサ,セイゾン ・ コシ,セイイク バショ カラ ミタ サンリク カイガン クロマツ ノ ヒガイ ジョウケン

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Simple and practical damage condition of black pine tree on the Sanriku coast against tsunamis is examined from the three viewpoints of action height h of critical horizontal force F, life-death and growth place (field test place) of the tree every damage type (lodging, uprooting, breaking) through field tests at Taro, Yamada and Fudai in Iwate, and proposed in the form of a relationship between the critical moment M (=h×F) acting on each tree and the chest-height diameter D. The validity of the damage condition is checked through the comparison with those previously proposed by Japan Riverfront Research Center (1999) for trees in the river channel, Matsutomi et al. (2011) for Sea Casuarina in Indonesia and Imai et al. (2013) for the coastal black pine tree.

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