EXPERIMENTAL STUDY ON AMOUNT OF SOIL EROSION AND PARTICLE SIZE DISTRIBUTION BY USING RAINFALL SIMULATOR

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  • ARAYA Megumi
    東京工業大学大学院 総合理工学研究科 環境理工学創造専攻
  • KINOUCHI Tsuyoshi
    東京工業大学大学院 総合理工学研究科 環境理工学創造専攻
  • OMATA Teppei
    大成建設株式会社技術センター

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  • 人工降雨装置を用いた土壌の浸食量と粒径分布に関する実験的検討
  • ジンコウ コウウ ソウチ オ モチイタ ドジョウ ノ シンショクリョウ ト リュウケイ ブンプ ニ カンスル ジッケンテキ ケントウ

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Abstract

 The radioactive substance, such as 134Cs and 137Cs from the Fukushima Dai-ichi Nuclear Power Plant (FDNPP), were transported with finer soil particles. In order to simulate the radiocesium transport, it is necessary to understand well the behavior of soil particle in hydrological systems. In this paper, we conducted the soil erosion experiment by using rainfall simulator and applied the existing erosion model to experimental results. Then we focused on the soil erosion phenomenon of each soil particle size. According to the experimental result, erosion rate reduces with time and flow rate become constant. The particle size distribution of eroded sediment and original soil surface are similar results. The existing erosion model reasonably reproduced different characteristic of each soil type and each particle size.

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