A Geomorphic Experimental Study on the Slope Inclination and Processes on Alluvial Cones

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  • 沖積錐の斜面傾斜とプロセスに関する地形実験
  • チュウセキ スイ ノ シャメン ケイシャ ト プロセス ニ カンスル チケイ ジッケン

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A geomorphic experiment was carried out in order to discuss the relationships between slope inclination and geomorphic processes on alluvial cones. An experimental slope (5 m in length, 1.8 m in width and 1.8 m in height) was modeled after alluvial cone with gravels and sand, and water was supplied from the top of the slope. The inclination of experimental slope shows between 20.0 degrees and 24.9 degrees on the parts having a tendency with sedimentation. The slopes with inclination ranging from 19.9 degrees to 15.0 degrees were constructed under a tendency of erosion. The materials on the former slopes were transported by some processes related to water level, such as unsaturated, saturated, and supersaturated debris flows. These differences were probably caused by the changes in degree of debris supply through the experiment.

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