ESTIMATION OF FINE SEDIMENT TRANSPORT USING FLUORESCENT X RAY AND NITROGEN CYCLE USING STABLE ISOTOPE

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  • 蛍光X線分析を利用した細粒土砂の輸送割合と安定同位体比による窒素循環量の推定
  • ケイコウ Xセン ブンセキ オ リヨウ シタ サイリュウ ドシャ ノ ユソウ ワリアイ ト アンテイ ドウイタイヒ ニ ヨル チッソ ジュンカンリョウ ノ スイテイ

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 Nutient is transported from a natural river basin to the ocean as particulate organic matters. On the other hand, nutrient is restored from the ocean to a river basin through run-up salmon that was captured by bears and eagles. Although there are some methods to evaluate mass transport, it is necessary to develop a new method for estimating mass transport from a river basin to the ocean accurately. This study thus aims to evaluate mass transport and nutrient restration between a river basin and the ocean. The Bayesian method was applied into the multiple regression analysis by using the fluorescent X ray analysis. As a result, it is demonstated that the proposed method was applied for evaluating fine sediment transport successfully by making comparisons with the other method, a neural network method.

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