重信川水系における水質の長期変動とその変動要因の考察

• 資料種別: 記事
• タイトル: 重信川水系における水質の長期変動とその変動要因の考察
• 著者・編者: 山下 尚之; 姫野 光生; 泉 智揮
• 著者標目: 山下 尚之; 姫野 光生; 泉 智揮
• 並列タイトル等: Long-Term Changes of Water Quality in Shigenobu River Basin and Examination of the Factors for the Water Quality Change
• タイトル（掲載誌）: Journal of rainwater catchment systems / 雨水資源化システム学会事務局 編
• 巻号年月日等（掲載誌）: 30(1):2024.7
• 掲載巻: 30
• 掲載号: 1
• 掲載ページ: 25-30
• 掲載年月日（W3CDTF）: 2024-07
• ISSN（掲載誌）: 1343-8646
• ISSN-L（掲載誌）: 1343-8646
• 出版事項（掲載誌）: 松山 : 雨水資源化システム学会事務局
• 出版地（国名コード）: JP
• 本文の言語コード: jpn
• 件名標目: Water quality; Long-term change; Shigenobu River; Multiple regression analysis
• NDLC: ZM2
• 対象利用者: 一般
• 所蔵機関: 国立国会図書館
• 請求記号: Z74-B360
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館雑誌記事索引; https://ndlsearch.ndl.go.jp
• 書誌ID（NDLBibID）: 033683083; http://id.ndl.go.jp/bib/033683083
• 整理区分コード: 632

• 要約等: <p> The water quality of Shigenobu River, which is the important river in Ehime prefecture, has been improved. However, the factors of the water quality improvement are not clarified until now. In this study, we evaluated the long-term changes of water quality, land use, population density and sewage coverage rate in Shigenobu River basin by water quality data and GIS (Geographic Information System) analysis. In addition, we examined the factors affecting the water quality changes by calculation of pollutant load unit and multiple regression analysis. From 2000 to 2018, BOD, TN and TP concentrations in Shigenobu River basin had decreased. In particular, the concentrations in Ono River basin had largely decreased. As for BOD, TN and TP load, Ono River had the highest contribution to the total load in Shigenobu River basin, which suggested that measures in Ono River basin would be important for reducing the total pollutant loads in Shigenobu River basin. As a result of multiple regression analysis, BOD, TN and TP concentrations were affected by population density, paddy field ratio and sewage coverage rate. Among these factors, sewage coverage rate was the most influential variable. Therefore, it was considered that the increase of sewage coverage rate in the river basin would contribute to the water quality improvement in Shigenobu River.</p>
• DOI: 10.7132/jrcsa.30_1_25
• オンライン閲覧公開範囲: インターネット公開
• 連携機関・データベース: 科学技術振興機構 : J-STAGE; http://www.jstage.jst.go.jp

• 要約等: <p> The water quality of Shigenobu River, which is the important river in Ehime prefecture, has been improved. However, the factors of the water quality improvement are not clarified until now. In this study, we evaluated the long-term changes of water quality, land use, population density and sewage coverage rate in Shigenobu River basin by water quality data and GIS (Geographic Information System) analysis. In addition, we examined the factors affecting the water quality changes by calculation of pollutant load unit and multiple regression analysis. From 2000 to 2018, BOD, TN and TP concentrations in Shigenobu River basin had decreased. In particular, the concentrations in Ono River basin had largely decreased. As for BOD, TN and TP load, Ono River had the highest contribution to the total load in Shigenobu River basin, which suggested that measures in Ono River basin would be important for reducing the total pollutant loads in Shigenobu River basin. As a result of multiple regression analysis, BOD, TN and TP concentrations were affected by population density, paddy field ratio and sewage coverage rate. Among these factors, sewage coverage rate was the most influential variable. Therefore, it was considered that the increase of sewage coverage rate in the river basin would contribute to the water quality improvement in Shigenobu River.</p>
• DOI: 10.7132/jrcsa.30_1_25; https://doi.org/10.7132/jrcsa.30_1_25
• 関連情報（URI）: http://id.ndl.go.jp/bib/033683083; https://ndlsearch.ndl.go.jp/books/R000000004-I033683083; https://www.jstage.jst.go.jp/article/jrcsa/30/1/30_30_1_25/_pdf
• 参照: Investigation of the freely available easy-to-use software ‘EZR’ for medical statistics; https://cir.nii.ac.jp/crid/1362825895236923136; 石手川の溶存酸素濃度に及ぼすカルシウムとマグネシウムの影響; https://cir.nii.ac.jp/crid/1390001204060135296; 水田からの窒素，リン，COD流出負荷量の実態と課題; https://cir.nii.ac.jp/crid/1390001205081240960; 河川の水質を制御する環境要因 取水堰下流で再生した石手川の場合; https://cir.nii.ac.jp/crid/1390282679035214208; 瀬切れが河川性底生動物の生息場所環境および群集構造の流程に沿った変化に及ぼす影響; https://cir.nii.ac.jp/crid/1390282679738144896; 有明海流入主要河川の流入負荷特性; https://cir.nii.ac.jp/crid/1390282680329701632; 重信川流域における栄養塩流出特性に関する調査研究; https://cir.nii.ac.jp/crid/1390282680329702656
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: Japan Link Center; https://japanlinkcenter.org/top; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; Crossref; https://www.crossref.org
• 書誌ID（NDLBibID）: 033683083; http://id.ndl.go.jp/bib/033683083