Browse > Article
http://dx.doi.org/10.12989/ose.2022.12.4.403

Monsoonal sediment transport along the subaqueous Mekong Delta: An analysis of surface sediment grain-size changes  

Thanh C., Nguyen (University of Science, Ho Chi Minh City)
An T., Dang (University of Science, Ho Chi Minh City)
Khuong N.T., Tran (University of Science, Ho Chi Minh City)
Publication Information
Ocean Systems Engineering / v.12, no.4, 2022 , pp. 403-411 More about this Journal
Abstract
Annually, about 48-60% of sediment discharge of the Mekong River is delivered near the mouths of the Mekong River branches which is mostly coinciding with the southwest (SW) monsoon. This sediment budget in turn will be southwestwardly transported along the coast of the Mekong Delta (MD) during the northeast (NE) monsoon. Analysis of monsoonal changes in grain-size distribution (GSD) of surface sediment contributes to a better understanding of erosion and deposition processes along the MD. This study aims to figure out changes in GSD and sediment textures along the MD between SW and NE monsoons based on 183 surficial sediment samples collected along the MD during two field surveys carried-out in October 2016 and February-March 2017. Compared to the GSD during the SW and NE monsoon, the GSD along the MD changed significantly, especially in the estuary areas and along the coast of Bac Lieu and Ganh Hao. Whereas, in the west coast of the MD, GSD seem no changes between the two seasons. These changes in seabed sediment suggest that sediment with grain-sizes ranging from silt to fine sand can be transported during only a NE season.
Keywords
bathymetry; eroding; fine sand; grain-size distribution; Mekong Delta;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Anthony, E.J., Brunier, G., Besset, M., Goichot, M., Dussouillez, P. and Nguyen, V.L. (2015), "Linking rapid erosion of the Mekong River Delta to human activities", Scientific Reports, 5, 14745. https://doi.org/10.1038/srep14745.   DOI
2 Besset, M., Gratiot, N., Anthony, E.J., Bouchette, F., Goichot, M. and Marchesiello, P. (2019), "Mangroves and shoreline erosion in the Mekong River Delta, Viet Nam", Estuar. Coast. Shelf S., 226, 106263. https://doi.org/10.1016/j.ecss.2019.106263.   DOI
3 Brunier, G., Anthony, E.J., Goichot, M., Provansal, M. and Dussouillez, P. (2014), "Recent morphological changes in the Mekong and Bassac river channels, Mekong eelta: The marked impact of river-bed mining and implications for delta destabilisation", Geomorphology, 224, 177-191. https://doi.org/10.1016/j.geomorph.2014.07.009.   DOI
4 Darby, S.E., Hackney, C.R., Leyland, J., Kummu, M., Lauri, H., Parsons, D.R., Best, J.L., Nicholas, A.P. and Aalto, R. (2016), "Fluvial sediment supply to a mega-delta reduced by shifting tropical-cyclone activity", Nature, 539(7628), 276-279. https://doi.org/10.1038/nature19809.   DOI
5 Kondolf, G.M., Rubin, Z.K. and Minear, J.T. (2014), "Dams on the Mekong: cumulative sediment starvation", Water Resour. Res., 50(6), 5158-5169.   DOI
6 Kummu, M. and Varis, O. (2006), "Sediment-related impacts due to upstream reservoir trapping, the lower Mekong River", Geomorphology, 85(3-4), 275-293. https://doi.org/10.1016/j.geomorph.2006.03.024.   DOI
7 Li, X., Liu, J.P., Saito, Y. and Nguyen, V.L. (2017), "Recent evolution of the Mekong Delta and the impacts of dams", Earth-Science Reviews, 175, 1-17. https://doi.org/10.1016/j.earscirev.2017.10.008.   DOI
8 Liu, J.P., DeMaster, D.J., Nittrouer, C.A., Eidam, E.F. and Nguyen, T.T. (2017), "A seismic study of the Mekong subaqueous delta: proximal versus distal sediment accumulation", Cont. Shelf Res., 147, 197-212. https://doi.org/10.1016/j.csr.2017.07.009.   DOI
9 Loisel, H., Mangin, A., Vantrepotte, V., Dessailly, D., Ngoc Dinh, D., Garnesson, P., Ouillon, S., Lefebvre, J.-P., Meriaux, X. and Minh Phan, T. (2014), "Variability of suspended particulate matter concentration in coastal waters under the Mekong's influence from ocean color (MERIS) remote sensing over the last decade", Remote Sens. Environ., 150, 218-230. https://doi.org/10.1016/j.rse.2014.05.006.   DOI
10 Manh, N. Van, Dung, N.V., Hung, N.N., Kummu, M., Merz, B. and Apel, H. (2015), "Future sediment dynamics in the Mekong Delta floodplains: Impacts of hydropower development, climate change and sea level rise", Global Planet. Change, 127, 22-33. https://doi.org/10.1016/j.gloplacha.2015.01.001.   DOI
11 Marchesiello, P., Nguyen, N.M., Gratiot, N., Loisel, H., Anthony, E.J., Dinh, C.S., Nguyen, T., Almar, R. and Kestenare, E. (2019), "Erosion of the coastal Mekong Delta: Assessing natural against man induced processes", Cont. Shelf Res., 181, 72-89. https://doi.org/10.1016/j.csr.2019.05.004.   DOI
12 Milliman, J.D. and Farnsworth, K.L. (2011), "River discharge to the coastal ocean", Cambridge University Press.
13 Milliman, J.D. and Meade, R.H. (1983), "World-wide delivery of river sediment to the oceans", J. Geology, 91(1), 1-21. https://www.jstor.org/stable/30060512.   DOI
14 Nguyen, T.T., Stattegger, K., Unverricht, D., Nittrouer, C., Phung, V.P., Liu, P., DeMaster, D., Bui, V.D., Le, D.A. and Mai, D.D. (2017), "Surface sediment grain-size distribution and sediment transport in the subaqueous Mekong Delta, Vietnam", Vietnam J. Earth Sci., 39(3), 193-209. https://doi.org/10.15625/0866-7187/39/3/10266.   DOI
15 O'Malley, J. (2007), "U.S Geological Survey ArcMap Sediment Classification Tool: Installation and User Guide".
16 Rasanen, T.A., Someth, P., Lauri, H., Koponen, J., Sarkkula, J. and Kummu, M. (2017), "Observed river discharge changes due to hydropower operations in the upper Mekong Basin", J. Hydrology, 545. https://doi.org/10.1016/j.jhydrol.2016.12.023.   DOI
17 Shepard, F.P. (1954), "Nomenclature based on sand-silt-clay ratios", J. Sedimentary Petrology, 24, 151-158. https://doi.org/10.1306/D4269774-2B26-11D7-8648000102C1865D.   DOI
18 Unverricht, D., Nguyen, T.C., Heinrich, C., Szczucinski, W., Lahajnar, N. and Stattegger, K. (2014), "Suspended sediment dynamics during the inter-monsoon season in the subaqueous Mekong Delta and adjacent shelf, southern Vietnam", J. Asian Earth Sci., 79, 509-519. https://doi.org/10.1016/j.jseaes.2012.10.008.   DOI
19 Szczucinski, W., Jagodzinski, R., Hanebuth, T.J.J., Stattegger, K., Wetzel, A., Mitrega, M., Unverricht, D. and Van Phach, P. (2013), "Modern sedimentation and sediment dispersal pattern on the continental shelf off the Mekong River Delta, South China Sea", Global Planet. Change, 110, 195-213. https://doi.org/10.1016/j.gloplacha.2013.08.019.   DOI
20 TCVN4198:2014 (2014), "Soils - Laboratory methods for particle - size analysis", Viet Nam Standards and Quality Institute. (in Vietnamese)
21 Unverricht, D., Szczucinski, W., Stattegger, K., Jagodzinski, R., Le, X.T. and Kwong, L.L.W. (2013), "Modern Sedimentation and morphology of the subaqueous Mekong Delta, Southern Vietnam", Global Planet. Change, 110, 223-235.   DOI
22 Walling, D.E. (2008), "The changing sediment load of the Mekong River", AMBIO: A J. Human Environment, 37(3), 150-157. https://doi.org/10.1579/0044-7447.   DOI
23 Wang, J.J., Lu, X.X. and Kummu, M. (2011), "Sediment load estimates and variations in the lower Mekong River", River Res. Appl., 27(1), 33-46. https://doi.org/10.1002/rra.1337   DOI