Long-term environmental changes in the Geum Estuary (South Korea): Implications of river impoundments
- Title
- Long-term environmental changes in the Geum Estuary (South Korea): Implications of river impoundments
- Author
- 신경훈
- Keywords
- Geum Estuary; Sedimentary organic carbon; Stable carbon isotope; n-Alkanes; River impoundment
- Issue Date
- 2021-05
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- MARINE POLLUTION BULLETIN, v. 168, Page. 112383-112383
- 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://www.sciencedirect.com/science/article/pii/S0025326X21004173https://repository.hanyang.ac.kr/handle/20.500.11754/171675
- ISSN
- 0025326X; 18793363
- DOI
- 10.1016/j.marpolbul.2021.112383
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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