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Water and heat budgets in a coastal lagoon controlled by groundwater outflow to the ocean

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タイトル: Water and heat budgets in a coastal lagoon controlled by groundwater outflow to the ocean
著者: Chikita, Kazuhisa A. 著作を一覧する
Uyehara, Hiroyuki 著作を一覧する
Al Mamun, Abdullah 著作を一覧する
Umgiesser, Georg 著作を一覧する
Iwasaka, Wataru 著作を一覧する
Hossain, Md Motaleb 著作を一覧する
Sakata, Yoshitaka 著作を一覧する
キーワード: Oikamanai Lagoon
Water budget
Heat budget
Confined groundwater outflow
Sand bar
発行日: 2015年 8月
出版者: Springer
誌名: Limnology
巻: 16
号: 3
開始ページ: 149
終了ページ: 157
出版社 DOI: 10.1007/s10201-015-0449-4
抄録: Oikamanai Lagoon in the Tokachi coastal region of Hokkaido, Japan, opens to the ocean several times a year due to water overflow across the sand bar triggered by rainfall or snowmelt runoffs of inflowing rivers. The water-budget calculation for the lagoon under closed conditions indicates that the net groundwater output occurs as confined groundwater, probably flowing into the ocean through the sand bar. The net groundwater output is then balanced mainly by river inflow. For the lagoon's heat budget, heat flux caused by net groundwater output was an unknown factor balanced by heat flux of river inflow and a change in the lagoon's heat storage. The two net groundwater outputs from water and heat budgets exhibit the linear relationship close to the one-to-one correspondence. Hence, two unknown factors-groundwater outflow (G (out)) and groundwater inflow (G (in))-were estimated separately. G (out) and G (in) values averaged over the budget period were estimated to be 1.04 m(3) s(-1) and 0.078 m(3) s(-1) (7.5 % of G (out)), respectively. Thus, the groundwater outflow to the ocean, representing most of the groundwater output, may control water residence time and water and material cycles related to the ecosystem in or around the lagoon.
Rights: The original publication is available at link.springer.com
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/62584
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 知北 和久

 

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