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Long-term environmental changes in the Geum Estuary (South Korea): Implications of river impoundments

Cited 1 time in wos
Cited 1 time in scopus
Title
Long-term environmental changes in the Geum Estuary (South Korea): Implications of river impoundments
Other Titles
금강하구의 장기적 확경 변화
Authors
Kang, Sujin
Kim, Jung-Hyun
Joe, Young Jin
Jang, Kwangchul
Nam, Seung-il
Shin, Kyung-Hoon
Subject
Environmental Sciences & EcologyMarine & Freshwater Biology
Keywords
Geum EstuarySedimentary organic carbonStable carbon isotopen-AlkanesRiver impoundment
Issue Date
2021-07
Citation
Kang, Sujin, et al. 2021. "Long-term environmental changes in the Geum Estuary (South Korea): Implications of river impoundments". MARINE POLLUTION BULLETIN, 168: 1-7.
Abstract
We investigated a sediment core collected from the Geum Estuary through sedimentological and geochemical analyses. Three lithological units were classified based on sedimentological characteristics. Unit 1 and Unit 3 were geochemically distinct, while Unit 2 was the transitional phase between them. The geochemical results suggest that the contribution of terrestrial organic carbon (OC) to the sedimentary OC pool in the coarse-grained Unit 1 was lesser than that of fine-grained Unit 3. The excess activity (210Pbex) and the sedimentation rate indicate that Unit 1 corresponded to 1977 Common Era (CE). Since the first dam construction on the Geum River began in 1975 CE, the deposition of Unit 1 in the Geum Estuary is likely associated with river impoundments, which reduce the delivery of fine-grained sediment and terrestrial OC to the estuary. This study highlights the role of river impoundments in altering the sedimentary OC and thus the sedimentary environment in the estuary.
URI
https://repository.kopri.re.kr/handle/201206/13636
DOI
http://dx.doi.org/10.1016/j.marpolbul.2021.112383
Type
Article
Station
기타()
Indexed
SCIE
Appears in Collections  
2020-2020, Changes in environments and coastal geomorphology of Svalbard fjords, Arctic (20-20) / Nam, Seung-il (PN20090)
2019-2019, Organic carbon transfer across the river-sea interface: a case study in Geum and Sumjin river systems (19-19) / Kim, Junghyun (PN19100)
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