Fractal analysis on the miniature erosion landform generated by artificial rainfall

• オオウチ, シュンジ

• Ouchi, Shunji

抄録

A miniature erosion landform was formed by applying artificial rainfall on a square mound made of a mixture of fine sand and kaolinite, and the surface topography was analyzed to evaluate the meaning of H', which is a parameter expressing a certain complexity of self-affine surfaces, in the landform evolution. Erosion started as rapid valley erosion, and then slow degradation of interfluves and ridges followed. The average height shows a clear exponential decrease. After 192 hours of rainfall, a low and gentle topography appeared. The value of H' decreases rapidly from 1 to 0.7～0.8 in the early stage and then gradually to 0.59 at the end of experiment, with a tendency to decrease towards 0.5 in a longer time period. This implies that the H' value of landform tends to decrease towards 0.5 with a long period of erosion, and that some reiterated uplift would be necessary to keep the larger H'.

収録刊行物

• Geographical Reports of Tokyo Metropolitan University

  Geographical Reports of Tokyo Metropolitan University (31), 97-103, 1996

  Department of Geography, Tokyo Metropolitan University

キーワード

• artificial rainfall
• miniature erosion landform
• fractal geometry
• landform evolution

詳細情報

• CRID: 1050001338271674880
• NII論文ID: 10003714981
• NII書誌ID: AA00200173
• ISSN: 03868710
• HANDLE: 10748/3678
• Web Site: https://tokyo-metro-u.repo.nii.ac.jp/records/2935
• 本文言語コード: en
• 資料種別: departmental bulletin paper
• データソース種別:
  • IRDB
  • CiNii Articles