{"created":"2024-12-12T09:06:09.827904+00:00","id":2010657,"links":{},"metadata":{"_buckets":{"deposit":"26c119b2-f746-4b42-9d44-19646c62f874"},"_deposit":{"created_by":7,"id":"2010657","owners":[7],"pid":{"revision_id":0,"type":"depid","value":"2010657"},"status":"published"},"_oai":{"id":"oai:tokushima-u.repo.nii.ac.jp:02010657","sets":["1713853213384:1713853295607"]},"author_link":["369"],"item_10001_alternative_title_1":{"attribute_name":"タイトル別表記","attribute_value_mlt":[{"subitem_alternative_title":"FIELD SURVEYS OF EFFECTS OF THE MAINTENANCE FLOW DISCHRAGE CHANGE ON RIVER ENVIRONMENT IN THE OHYAMA RIVER","subitem_alternative_title_language":"en"}]},"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2006-06","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"448","bibliographicPageStart":"443","bibliographicVolumeNumber":"12","bibliographic_titles":[{"bibliographic_title":"河川技術論文集","bibliographic_titleLang":"ja"},{"bibliographic_title":"Advances in River Engineering","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The maintenance flow discharge of the Ohyama River, which is located in the upper Chikugo River, had been restricted to 1.5m3/s by a hydroelectric dam. To improve the river environment, the river administrator has changed the maintenance flow discharge to 4.5m3/s in summer and to 1.8m3/s in winter. In this study, we aim at proposing an optimal control of the maintenance flow discharge for the river environment. Firstly, we carried out field surveys before and after reducing the river discharge in order to figure out effects on hydraulic conditions and attached algae. The results of the surveys show that hydraulic conditions become worse for ayu (plecoglossus altivelis) and attached algae. Also, there is a tendency to stagnate at the pool when the maintenance flow discharge decreases. Secondly, because it was reported that the length of ayu became larger than before changing the maintenance flow discharge, we attempted to analyze carbon and nitrogen stable isotope ratio of ayu and attached algae. We confirmed an obvious difference in food web structure between natural and cultured ayu.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"土木学会","subitem_publisher_language":"ja"}]},"item_10001_rights_15":{"attribute_name":"権利情報","attribute_value_mlt":[{"subitem_rights":"© 2006 社団法人 土木学会","subitem_rights_language":"ja"}]},"item_10001_source_id_9":{"attribute_name":"収録物ID","attribute_value_mlt":[{"subitem_source_identifier":"24366714","subitem_source_identifier_type":"ISSN"}]},"item_10001_version_type_20":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_1715043197608":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open 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Yasushi","creatorNameLang":"en"}]},{"creatorAffiliations":[{"affiliationNameIdentifiers":[{"affiliationNameIdentifier":"","affiliationNameIdentifierScheme":"ISNI","affiliationNameIdentifierURI":"http://www.isni.org/isni/"}],"affiliationNames":[{"affiliationName":"","affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"河口, 洋一","creatorNameLang":"ja"},{"creatorName":"カワグチ, ヨウイチ","creatorNameLang":"ja-Kana"},{"creatorName":"Kawaguchi, Yoichi","creatorNameLang":"en"}],"familyNames":[{"familyName":"河口","familyNameLang":"ja"},{"familyName":"カワグチ","familyNameLang":"ja-Kana"},{"familyName":"Kawaguchi","familyNameLang":"en"}],"givenNames":[{"givenName":"洋一","givenNameLang":"ja"},{"givenName":"ヨウイチ","givenNameLang":"ja-Kana"},{"givenName":"Yoichi","givenNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"369","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"189080/profile-ja.html","nameIdentifierScheme":"徳島大学 教育研究者総覧","nameIdentifierURI":"http://pub2.db.tokushima-u.ac.jp/ERD/person/189080/profile-ja.html"},{"nameIdentifier":"20391617","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://nrid.nii.ac.jp/ja/search/?qm=20391617"}]},{"creatorNames":[{"creatorName":"島谷, 幸宏","creatorNameLang":"ja"},{"creatorName":"シマタニ, ユキヒロ","creatorNameLang":"ja-Kana"},{"creatorName":"Simatani, Yukihiro","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"緒方, 健","creatorNameLang":"ja"},{"creatorName":"オガタ, タケシ","creatorNameLang":"ja-Kana"},{"creatorName":"Ogata, Takeshi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"山崎, 正敏","creatorNameLang":"ja"},{"creatorName":"ヤマザキ, マサトシ","creatorNameLang":"ja-Kana"},{"creatorName":"Yamazaki, Masatoshi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"清野, 聡子","creatorNameLang":"ja"},{"creatorName":"セイノ, サトコ","creatorNameLang":"ja-Kana"},{"creatorName":"Seino, Satoko","creatorNameLang":"en"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2023-01-13"}],"displaytype":"detail","filename":"river_12_443.pdf","filesize":[{"value":"667 KB"}],"format":"application/pdf","mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://tokushima-u.repo.nii.ac.jp/record/2010657/files/river_12_443.pdf"},"version_id":"84bae62a-1904-4f8f-bfd9-7395352e11f6"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"maintenance flow discharge","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"hydraulic condition","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"attached algae","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"ayu","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"stable isotope ratio","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal 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