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a61b0p53.pdf | 2.22 MB | Adobe PDF | 見る/開く |
タイトル: | 河床表層の鉛直構造の変動を考慮した付着藻類現存量の変動予測 |
その他のタイトル: | Predicting Algal Biomass Focusing on Vertical Riverbed Structure |
著者: | 宮川, 幸雄 角, 哲也 https://orcid.org/0000-0002-1423-7477 (unconfirmed) 竹門, 康弘 |
著者名の別形: | MIYAGAWA, Yukio SUMI, Tetsuya TAKEMON, Yasuhiro |
キーワード: | 付着藻類 河床 露出高 河床埋没度 attached algae riverbed exposed height riverbed covered degree |
発行日: | Sep-2018 |
出版者: | 京都大学防災研究所 |
誌名: | 京都大学防災研究所年報. B |
巻: | 61 |
号: | B |
開始ページ: | 756 |
終了ページ: | 769 |
抄録: | Supplying sediment below dams may change algal biomass on stone surfaces by not only promoting detaching algae but also decreasing exposed stone surface area for algae growth. This study is aiming to predict the algal biomass per unit area. Attached algae growth and detaching rate were measured in the prototype flume to make a prediction model focusing sand height and algal biomass. We also developed a new model to estimate the average height of exposed stones and their distribution. The result showed that the production rate was higher after sediment supply. Especially, the highest rate was recorded in case that the sand height was the just before the stone surface area start to decrease by sediment covering. If sediment will not reduce exposed area, higher production rate can be expected under the increasing sediment supply condition. The estimation of the exposed height or the riverbed covered degree should contribute to evaluate the effects of sediment supply on the habitat of attached algae. |
URI: | http://hdl.handle.net/2433/235892 |
関連リンク: | http://www.dpri.kyoto-u.ac.jp/publications/nenpo/ |
出現コレクション: | Vol.61 B |
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