KOPRI Repository

Organic carbon transfer across the open and closed estuary systems: a case study of Geum and Seomjin River systems, South Korea

Cited 0 time in wos
Cited 0 time in scopus

Full metadata record

DC Field Value Language
dc.contributor.authorKang, Sujin-
dc.contributor.authorKim, Jung-Hyun-
dc.contributor.authorKim, Daun-
dc.contributor.authorSong, Hyeongseok-
dc.contributor.authorRyu, Jong-Sik-
dc.contributor.authorShin, Kyung-Hoon-
dc.date.accessioned2021-08-27T01:21:23Z-
dc.date.available2021-08-27T01:21:23Z-
dc.date.issued2018-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/12664-
dc.description.abstractIn this study, we investigated spatiotemporal variations in organic carbon (OC) concentration and isotope to understand river damming impact on the transport of riverine carbon. We collected surface water samples in two contrasting Korean river systems (Geum and Seomjin) across the river-sea interfaces along a salinity gradient in August and December 2016, and analysed OC concentrations and their isotopes. The Geum River flows into the Yellow Sea which has a dam at the river mouth, while the Seomjin River flowing into the South Sea of Korea has an open estuary. The fluxes of riverine total organic carbon (TOC; sum of dissolved OC (DOC) and particulate OC (POC)) were much larger (4237.0 and 963.1 g/s in August and December, respectively) in the Geum River than those (51.5 and 38.5 g/s in August and December, respectively) in the Seomjin River. In the Geum River, DOC concentrations were 2.0-3.8 mg/l in August and 1.3-5.3 mg/l in December, while POC concentrations were in the range of 0.2-12.7 mg/l and 0.3-2.6 mg/l in August and December, respectively. In the Seomjin River, DOC and POC concentrations were 1.9-2.4 mg/l and 0.8-1.0 mg/l in August and 1.1-1.5 mg/l and 0.3-0.5 in December, respectively. Both DOC and POC concentrations showed decreasing trends from river to sea in the Geum River, especially in August but none in the Seomjin River. In the Geum River, δ13CPOC values were -21.1±2.5 ‰ before the dam and -22.4±1.5 ‰ after the dam in August, while they were -30.61±2.7 ‰ before the dam and -27.17±2.4 ‰ after the dam in December. We observed a heavy algal bloom before the dam during the sampling in August, which resulted in higher δ13CPOC values in the Geum River. In the Seomjin River, δ13CPOC values were -29.1 to -21.1 ‰ in August and -29.0 to -26.6 ‰ in December, showing an increasing trend from river to sea. The Δ14CPOC values in the Geum River were -51.1 ‰ before the dam and -98.2 ‰ after the dam in August and -87.0 ‰ before the dam and -221.8 ‰ after the dam in December. In the Seomjin River, the Δ14CPOC values were much lower with -186.7±2.2 ‰ in August and -214.2±38 ‰ in December. Accordingly, our results show that the two contrasting river systems are differently functioning due to an algal bloom occurred in the closed Geum estuary system, and therefore influencing OC concentrations and characteristics transferred from land to sea.en_US
dc.languageEnglishen_US
dc.language.isoenen_US
dc.titleOrganic carbon transfer across the open and closed estuary systems: a case study of Geum and Seomjin River systems, South Koreaen_US
dc.title.alternative개방 및 폐쇄된 강하구역에서의 유기 탄소 이동 : 한국 금강 및 금진강 사례 연구en_US
dc.typeProceedingen_US
dc.identifier.bibliographicCitationKang, Sujin, et al. 2018. Organic carbon transfer across the open and closed estuary systems: a case study of Geum and Seomjin River systems, South Korea. 9th International Conference on Asian Marine Geology. Shanghai. 2018.10.09~2018.10.12.-
dc.citation.conferenceDate2018.10.09~2018.10.12en_US
dc.citation.conferenceName9th International Conference on Asian Marine Geologyen_US
dc.citation.conferencePlaceShanghaien_US
dc.description.articleClassificationPro(초록)국외-
dc.subject.keywordGeum Riveren_US
dc.subject.keywordOrganic transferen_US
dc.subject.keywordSeomjin Riveren_US
dc.identifier.localId2018-0378-
Appears in Collections  
2018-2019, Organic carbon transfer across the river-sea interface: a case study in Geum and Sumjin river systems (18-19) / Kim, Junghyun (PN18100)
Files in This Item

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse