Effect of Artificial Structures on the Long-Term Topographic Changes at Daehang-ri Intertidal Flat, the West Coast of Korea

Tae-Jin  Choi; Eui-Young  Jeong; Young Jin  Yang; Jin-Yong  Choi

doi:10.5389/KSAE.2020.62.2.075

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2020 Vol.62, Issue 2 Preview Page Next Page

Effect of Artificial Structures on the Long-Term Topographic Changes at Daehang-ri Intertidal Flat, the West Coast of Korea 인공구조물에 의한 대항리 갯벌의 장기 지형변화

2020. pp. 75-82

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Abstract

The Daehang-ri intertidal flat located the just outside of the Saemangeum dike has been reported to show new-developing flats. Based on the topographic surveys of 21 times from 2000 to 2016 by a leveling method every year, this site clearly shows variation of deposition/erosion in time and space. Deposition has consistently occurred at the rate of +3.75 cm per year at the area along the dike (Zone 1), and this tidal flat is expanding and prograding seaward. In the area of far from the dike (Zone 2), on the other hand, erosion prevails at the rate of -2.38 cm per year, and this zone tends to retreat landward. However, the erosional trend of Zone 2 has slightly slowed down since 2014. As a whole from 2000 to 2016, net deposition is recorded over 3.0 m at the upper beach and the area adjacent to the dike (Zone 1), while erosion up to 1.0 m in Zone 2. In conclusion, the results at the Daehang-ri intertidal flat clearly revealed that its topographic changes were induced by the artificial structures and water masses through its sluice gate. Counter-clockwise gyre newly created after the sea dikes construction probably results in relocating of sediment outside the dike 1 by transportation of materials eroded from the south to the north along the coast.

Keywords

Topographic changes

artificial structures

Saemangeum dike

Daehang-ri tidal flat

References

REFERENCES

H. Choi and M. B. Lee, Journal of The Korean Geomorphological Association, The geomorphic changes of sand-beach coasts by human impact in Byeonsan peninsula, southwest Korea., 19(3); 83-96, (in Korean). (2012)

J. H. Choi and J. Y. Choi, KCID Journal, Nourishment effect and morphological changes of byeonsan beach, west coast, south Korea (2011~2014)., 22(1); 13-26, (in Korean). (2015)

J. K. Choi, J. G. Son, J. G. Kim and K. I. Song, Journal of Korean Society of Rural Planning, Changes in sea bottom topology with Saemangeurn project., 8(2); 17-26, (in Korean). (2002)

J. Y. Choi and D. I. Lim, Journal of Coastal Research, Morphological change at Byunsan beach, west coast of Korea; 14-years monitoring during the Saemangum reclamation project., 50(SI); 1112-1115 (2007)

J. Y. Choi, J. Y. Park, J. H. Choi and J. M. Lee, Irrigation and DrainageEffects of beach nourishment and the influence of irrigation water discharge on Byunsan beach, west coast, Korea., 65; 239-245 (2016)10.1002/ird.204825855820

T. J. Choi, J. Y. Choi, J. Y. Park, H. Y. Um and J. H. Choi, Journal of Coastal Research, The effects of nourishments using the grain-size trend analysis on the intertidal zone at a sandy macrotidal beach., 85(SP1); 426-430 (2018)10.2112/si85-086.1

D. S. Eo, K. W. Choi and S. K. Kang, KCID Journal, Study on beach face variation based on long-term measurement data analysis in Byeonsan beach., 6(1); 39-47, (in Korean). (1999)

HR Wallingford,, Saemangum sea dikes: Wave climate and engineering review, EX 3668., Oxfordshire, United Kingdom.. (1997)

M. J. Kim, C. S. Kim, B. J. Choi and S. H. Lee, Journal of Coastal Research, Plume current change by seawall construction for a harbor development in south Korea., 85(SI); 126-130 (2018)10.2112/si85-026.1

T. R. Kim and S. K. Park, Journal of Korean Society of Coastal and Ocean Engineers, Camera monitoring of topographical changes of Daehang-ri intertidal flat outside Semangeum sea dike No.1., 21(6); 453-461, (in Korean). (2009)

B. J. Koo, S. H. Shin and S. Lee, Ocean and Polar ResearchChanges in benthic macrofauna of the Saemangeum tidal flat as result of a drastic tidal reduction., 30(8); 485-495, (in Korean). (2008)10.4217/opr.2008.30.4.485

Korea Ocean Research and Development Institute (KORDI),, Saemangeum coastal system research for marine environmental conservation, BSPM55630-2269-2., (in Korean)., Ansan, Korea. (2011)

Korea Rural Community Corporation (KRC),, Company newsletter 215, 12-13., (in Korean)., Naju, Korea. (2003)

H. K. Kwon, K. W. Choi, J. R. Jang and J. Y. Jung, KCID JournalMorphological change of lower tidal flat in Byunsan⋅Gosapo beach., 17(2); 49-56, (in Korean). (2010)

H. J. Lee, H. R. Jo and M. J. Kim, Ocean and Polar ResearchTopographical changes and textural characteristics in the areas around the Saemangeum dyke., 28(3); 293-303, (in Korean). (2006)10.4217/opr.2006.28.3.293

H. J. Lee, M. J. Kim and T. K. Kim, Ocean and Polar ResearchModern sedimentary environments within the Gogunsan archipelago., 30(4); 519-536, (in Korean). (2008)10.4217/opr.2008.30.4.519

H. J. Lee and S. O. Ryu, Continental Shelf ResearchChanges in topography and surface sediments by the Saemangeum dyke in an estuarine complex, west coast of Korea., 28(9); 1177-1189 (2008)10.1016/j.csr.2008.03.008

S. Lee, Environmental Law and PolicyPrediction of changes in the Saemangeum marine environments, and its assesment., 9; 140-151, (in Korean). (2012)

Rural Research Institute (RRI),, Changes on sedimentary environment and coastal morphology due to sea dike construction, 99-05-18., (in Korean)., Ansan, Korea. (1999)

Rural Research Institute (RRI),, Study on the topographic changes off sea dikes before and after construction of dikes and the investigation of reclamation projects at the southwest coast,, (in Korean)., 2002.

The Jeonbuk Domin Ilbo,, Tidal flat at Saemangeum was formed about 134 ha,, (in Korean)., Jeonju. (2005)

The Kyunghyan Shinmun,, A year after closure of Saemangeum,, (in Korean)., Seoul. (2007)

The Seoul Shinmun,, Common orient clams off Saemangeum were gone,, (in Korean)., Seoul. (2010)

Information

Publisher :The Korean Society of Agricultural Engineers
Publisher(Ko) :한국농공학회
Journal Title :Journal of Korean Society of Agricultural Engineers
Journal Title(Ko) :한국농공학회논문집
Volume : 62
No :2
Pages :75-82
Received Date : 2020-02-03
Revised Date : 2020-03-16
Accepted Date : 2020-03-18
DOI :https://doi.org/10.5389/KSAE.2020.62.2.075

Journal of Korean Society of Agricultural Engineers ISSN:1738-3692(Print) 2093-7709(Online) 한국농공학회논문집

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REFERENCES