Analysis of Tottori Dune deformation using EOF method

  • MITSUSHIO Shota
    Department of Civil Engineering, Graduate school of Engineering, Tohoku University
  • UDO Keiko
    International Research Institute of Disaster Science
  • NAGAMATSU Dai
    Department of Regional Environment, Graduate school of Regional Sciences, Tottori University
  • MATSUBARA Yuhei
    Department of Civil Engineering, Graduate school of Engineering, Tottori University
  • MANO Akira
    International Research Institute of Disaster Science

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Other Title
  • 経験的固有関数法を用いた鳥取砂丘の地形変化特性の解析
  • ケイケンテキ コユウ カンスウホウ オ モチイタ トットリ サキュウ ノ チケイ ヘンカ トクセイ ノ カイセキ

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Abstract

 Tottori Dune, located in San-in Coast, is the largest dune in Japan and stretches 16 km in the longshore direction and 2 km in the cross-shore direction. This study investigates characteristics of Hamasaka Dune deformation, which is a main part of the Tottori Dune in the late 2000s through three-dimensional eigenfunction analysis using monthly ground elevation data. The first spatial and temporal functions demonstrate that sedimentation occurred in the east side of the dune and erosion occurred in the west side and, additionally, the variation accelerated from 2007 to 2008. The relationship between vegetation cover ratio and the first spatial function indicates that vegetation has a function to stabilize the dune morphology.

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