{"created":"2025-10-29T02:36:30.609782+00:00","id":2001421,"links":{},"metadata":{"_buckets":{"deposit":"821def90-aacc-480a-9751-31e13d259677"},"_deposit":{"created_by":121,"id":"2001421","owner":"121","owners":[121],"pid":{"revision_id":0,"type":"depid","value":"2001421"},"status":"published"},"_oai":{"id":"oai:repository.naro.go.jp:02001421","sets":["1706970004180:1","87:661:1727312983899:1727312636636:1761703069810"]},"author_link":["1947","718","1498","11470"],"item_12_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011-03-31","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"185","bibliographicPageStart":"171","bibliographicVolumeNumber":"211","bibliographic_titles":[{"bibliographic_title":"農村工学研究所技報","bibliographic_titleLang":"ja"},{"bibliographic_title":"Technical report of the National Institute for Rural Engineering","bibliographic_titleLang":"en"}]}]},"item_12_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Nowadays, it is not uncommon to see residential houses constructed along agricultural canals due to advancement of urbanization. Around installation sites of water management facilities such as gates and drops in agricultural canals, passing irrigation water generates overflow water noise. In this study, the sound characteristics of spilled water at overflow weirs are elucidated by detailed laboratory experiments. In addition, the issue of conventional art related to low-frequency noise reduction, countermeasure works to prevent vibration of water screen and its effect are indicated.\n According to the experiments, low-frequency noise generates in any hydraulic conditions, however, the peak of noise shown in between 2 and 4cm of overflow depth generates due to turbulence and vibration of lower domain of water screen. Spoilers as a conventional work aims at only making enclosed region of the back of water screen open, and they aren’t often unable to function in inhibiting the formation of water screen and its vibration.\n Countermeasure works proposed in this study are aimed at low-frequency noise generated by water screen at relatively low drops around 2m. They not only make enclosed region of the back of water screen open such as conventional spoilers but also make falling water into water bundle, and inhibit the formation of water screen. Though we made two types of trial model, box type and gutter type countermeasure works, the gutter type model is recommended because they have stable noise reduction effect against the difference of width of works and the change of overflow depth. These countermeasure works can be installed easily in situ, and reduce G-weighted sound pressure level by 20dB or more.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_12_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.24514/0002001421","subitem_identifier_reg_type":"JaLC"}]},"item_12_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"独立行政法人 農業・食品産業技術総合研究機構 農村工学研究所","subitem_publisher_language":"ja"},{"subitem_publisher":"National Agriculture and Food Research Organization, National Institute for Rural Engineering","subitem_publisher_language":"en"}]},"item_12_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1882-3289","subitem_source_identifier_type":"PISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"TAKAKI, Kyoji","creatorNameLang":"en"},{"creatorName":"髙木, 強治","creatorNameLang":"ja"},{"creatorName":"タカキ, キョウジ","creatorNameLang":"ja-Kana"}],"familyNames":[{"familyName":"TAKAKI","familyNameLang":"en"},{"familyName":"髙木","familyNameLang":"ja"},{"familyName":"タカキ","familyNameLang":"ja-Kana"}],"givenNames":[{"givenName":"Kyoji","givenNameLang":"en"},{"givenName":"強治","givenNameLang":"ja"},{"givenName":"キョウジ","givenNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"1947","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"10425522","nameIdentifierScheme":"e-Rad_Researcher","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=10425522"},{"nameIdentifier":"kyon-tkk","nameIdentifierScheme":"researchmap","nameIdentifierURI":"http://researchmap.jp/kyon-tkk"}]},{"creatorNames":[{"creatorName":"GOTO, Masahiro","creatorNameLang":"en"},{"creatorName":"後藤, 眞宏","creatorNameLang":"ja"},{"creatorName":"ゴトウ, マサヒロ","creatorNameLang":"ja-Kana"}],"familyNames":[{"familyName":"GOTO","familyNameLang":"en"},{"familyName":"後藤","familyNameLang":"ja"},{"familyName":"ゴトウ","familyNameLang":"ja-Kana"}],"givenNames":[{"givenName":"Masahiro","givenNameLang":"en"},{"givenName":"眞宏","givenNameLang":"ja"},{"givenName":"マサヒロ","givenNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"718","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"20370596","nameIdentifierScheme":"e-Rad_Researcher","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=20370596"},{"nameIdentifier":"nires60r3","nameIdentifierScheme":"researchmap","nameIdentifierURI":"http://researchmap.jp/nires60r3"}]},{"creatorNames":[{"creatorName":"NAMIHIRA, Atsushi","creatorNameLang":"en"},{"creatorName":"浪平, 篤","creatorNameLang":"ja"},{"creatorName":"ナミヒラ, アツシ","creatorNameLang":"ja-Kana"}],"familyNames":[{"familyName":"NAMIHIRA","familyNameLang":"en"},{"familyName":"浪平","familyNameLang":"ja"},{"familyName":"ナミヒラ","familyNameLang":"ja-Kana"}],"givenNames":[{"givenName":"Atsushi","givenNameLang":"en"},{"givenName":"篤","givenNameLang":"ja"},{"givenName":"アツシ","givenNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"1498","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"80414423","nameIdentifierScheme":"e-Rad_Researcher","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=80414423"},{"nameIdentifier":"wave","nameIdentifierScheme":"researchmap","nameIdentifierURI":"http://researchmap.jp/wave"}]},{"creatorNames":[{"creatorName":"関谷, 明","creatorNameLang":"ja"},{"creatorName":"セキヤ, アキラ","creatorNameLang":"ja-Kana"},{"creatorName":"SEKIYA, Akira","creatorNameLang":"en"}],"familyNames":[{"familyName":"関谷","familyNameLang":"ja"},{"familyName":"セキヤ","familyNameLang":"ja-Kana"},{"familyName":"SEKIYA","familyNameLang":"en"}],"givenNames":[{"givenName":"明","givenNameLang":"ja"},{"givenName":"アキラ","givenNameLang":"ja-Kana"},{"givenName":"Akira","givenNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"11470","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"峯岸, 雄一","creatorNameLang":"ja"},{"creatorName":"MINEGISHI, Yuichi","creatorNameLang":"en"}],"familyNames":[{"familyName":"峯岸","familyNameLang":"ja"},{"familyName":"MINEGISHI","familyNameLang":"en"}],"givenNames":[{"givenName":"雄一","givenNameLang":"ja"},{"givenName":"Yuichi","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"長嶺, 拓夫","creatorNameLang":"ja"},{"creatorName":"NAGAMINE, Takuo","creatorNameLang":"en"}],"familyNames":[{"familyName":"長嶺","familyNameLang":"ja"},{"familyName":"NAGAMINE","familyNameLang":"en"}],"givenNames":[{"givenName":"拓夫","givenNameLang":"ja"},{"givenName":"Takuo","givenNameLang":"en"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2025-10-31"}],"displaytype":"preview","filename":"TRNIRE211_171-185.pdf","filesize":[{"value":"3.4 MB"}],"format":"application/pdf","license_note":"(c) 国立研究開発法人 農業・食品産業技術総合研究機構\nNational Agriculture and Food Research Organization, Japan","licensetype":"license_note","mimetype":"application/pdf","url":{"url":"https://repository.naro.go.jp/record/2001421/files/TRNIRE211_171-185.pdf"},"version_id":"258e7650-bd79-454a-822e-432d0e3d96e4"}]},"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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"越流堰からの落水によって発生する低周波騒音の特徴と低減工法","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"越流堰からの落水によって発生する低周波騒音の特徴と低減工法","subitem_title_language":"ja"},{"subitem_title":"Sound Characteristics of Spilled Water and Countermeasure Works of Low-Frequency Noise at Overflow Weirs","subitem_title_language":"en"}]},"item_type_id":"12","owner":"121","path":["1","1761703069810"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2025-10-31"},"publish_date":"2025-10-31","publish_status":"0","recid":"2001421","relation_version_is_last":true,"title":["越流堰からの落水によって発生する低周波騒音の特徴と低減工法"],"weko_creator_id":"121","weko_shared_id":-1},"updated":"2026-01-30T05:00:10.033788+00:00"}