山地源流域での細粒土砂生産に対する降雨の影響:沈殿方式による簡易サンプリングを用いた検討
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概要
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The volume of fine particle sediment, measured over several days using simple sampling tanks at the mouth of small mountainous catchments, was analyzed in relation to rainfall and landform attributes. The relationships between the effective cumulative rainfall calculated from daily and antecedent rainfall and the sediment volume sampled for several days were shown by power functions with high correlation coefficients. However the power functions are determined primarily by increases in sediment at 1400mm in effective cumulative rainfall and 600mm and/or 900mm in effective event rainfall. Because catchment areas addressed here were remarkably small and slopes were steep compared with other catchments, exponents of the power function were smaller than the results from measurement data from other catchments. These results indicate that overland flow might influence the sediment yield from the surface of small, steep catchments.
- 社団法人 砂防学会の論文
社団法人 砂防学会 | 論文
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