Volume 42 Issue 9
Sep.  2023
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Article Contents
Yanming Yao, Xueqian Chen, Jinxiong Yuan, Li Li, Weibing Guan. Impacts of channel dredging on hydrodynamics and sediment dynamics in the main channels of the Jiaojiang River Estuary in China[J]. Acta Oceanologica Sinica, 2023, 42(9): 132-144. doi: 10.1007/s13131-022-2118-x
Citation: Yanming Yao, Xueqian Chen, Jinxiong Yuan, Li Li, Weibing Guan. Impacts of channel dredging on hydrodynamics and sediment dynamics in the main channels of the Jiaojiang River Estuary in China[J]. Acta Oceanologica Sinica, 2023, 42(9): 132-144. doi: 10.1007/s13131-022-2118-x

Impacts of channel dredging on hydrodynamics and sediment dynamics in the main channels of the Jiaojiang River Estuary in China

doi: 10.1007/s13131-022-2118-x
Funds:  The National Key Research and Development Program of China under contract No. 2020YFD0900803; the National Natural Science Foundation of China under contract Nos 41976157 and 42076177; the Science Technology Department of Zhejiang Province under contract No. 2022C03044; the State Key Laboratory of Satellite Ocean Environment Dynamics of the Ministry of Natural Resources of China under contract No. QNHX1807.
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  • Corresponding author: E-mail: lilizju@zju.edu.cn
  • Received Date: 2022-07-24
  • Accepted Date: 2022-09-14
  • Publish Date: 2023-09-01
  • Channel dredging in estuaries increases water depth and subsequently impacts sediment dynamics and morphology. The Jiaojiang River Estuary is dredged frequently owing to heavy shipping demands. In this study, the effects of different dredging schemes on siltation were assessed through numerical modeling. The sediment model of the Jiaojiang River Estuary utilized an optimized bottom boundary layer model that considered the bed sediment grain size and fluid mud, and this model was calibrated using field data. Result reveal that channel dredging modifies the flow velocity inside and around the channel by changing the bathymetry; subsequently, this affects the residual current, bed stress, suspended sediment concentration, and sediment fluxes. Increasing the dredging depth and width increases the net sediment fluxes into the channel and dredging depth has a greater influence on the channel siltation thickness. When the dredging depth is 8.4 m or11.4 m, the average siltation thickness of the channel is 0.07 m or 0.15 m per mouth respectively. The parallel movement of the channel has small effects on the siltation volume during the simulation period. The sediment deposits in the channel primarily originates from the tidal flats, through bottom sediment fluxes. Vertical net circulation has a dominant impact on siltation because the difference of horizontal current of each layer on the longitudinal section of the channel increases, which intensifies the lateral sediment transport between the shoal and channel. The influence of vertical frictional dissipation on the lateral circulation at the feature points accounts for more than 50% before dredging, while the non-linear advective term is dominant after dredging. Tidal pumping mainly affects the longitudinal sediment fluxes in the channel. These results can be used for channel management and planning for similar estuaries worldwide.
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  • Aubrey D G, Speer P E. 1985. A study of non-linear tidal propagation in shallow inlet/estuarine systems Part I: Observations. Estuarine, Coastal and Shelf Science, 21(2): 185–205,
    Chen Changsheng, Liu Hedong, Beardsley R C. 2003. An unstructured grid, finite-volume, three dimensional, primitive equation ocean model: application to coastal ocean and estuaries. Journal of Atmospheric & Oceanic Technology, 20(1): 159–186. doi: 10.1175/1520-0426(2003)020<0159:AUGFVT>2.0.CO;2
    Dong Lixian, Wolanski E, Li Yan. 1997. Field and modeling studies of fine sediment dynamics in the extremely turbid Jiaojiang River Estuary, China. Journal of Coastal Research, 13(4): 995–1003
    Dong Jia, Zhang Ningchuan. 2011. Sediment parameter selecting method and its application in sediment concentration research. Journal of Waterway and Harbor (in Chinese), 32(5): 321–328. doi: 10.3969/j.issn.1005-8443.2011.05.004
    Dou Guoren. 1999. Incipient motion of coarse and fine sediment. Journal of Sediment Research (in Chinese), (6): 1–9. doi: 10.16239/j.cnki.0468-155x.1999.06.001
    Dyer K R. 1997. Partially mixed and well-mixed estuaries. In: Dyer K R, ed. Estuaries: A Physical Introduction. 2nd ed. Chichester: John Wiley and Sons, 136–164
    Egbert G D, Erofeeva S Y, Ray R D. 2010. Assimilation of altimetry data for nonlinear shallow-water tides: quarter-diurnal tides of the Northwest European shelf. Continental Shelf Research, 30(6): 668–679. doi: 10.1016/j.csr.2009.10.011
    Figueroa S M, Lee G H, Shin H J. 2020. Effects of an estuarine dam on sediment flux mechanisms in a shallow, macrotidal estuary. Estuarine, Coastal and Shelf Science, 238: 106718,
    Folk R L, Andrews P B, Lewis D W. 1970. Detrital sedimentary rock classification and nomenclature for use in New Zealand. New Zealand Journal of Geology and Geophysics, 13(4): 937–968. doi: 10.1080/00288306.1970.10418211
    Ghosh L K, Prasad N, Joshi V B, et al. 2001. A study on siltation in access channel to a port. Coastal Engineering, 43(1): 59–74. doi: 10.1016/S0378-3839(01)00006-0
    Gu Fengfeng. 2018. Analysis method on influential factors to navigation channel siltation in estuary high suspended sediment concentration zone. Yangtze River (in Chinese), 49(20): 8–12. doi: 10.16232/j.cnki.1001-4179.2018.20.002
    Guo Leicheng, van der Wegen M, Roelvink J A, et al. 2014. The role of river flow and tidal asymmetry on 1-D estuarine morphodynamics. Journal of Geophysical Research: Earth Surface, 119(11): 2315–2334. doi: 10.1002/2014JF003110
    Huang Zhiyang. 2007. Research on the deposition of Lianyungang’s deep-water navigation channel on muddy coast (in Chinese) [dissertation]. Nanjing: Hoihai University
    Jin Liu. 2019. Influences of fine sediment transport and transversal sediment transport between shoal and channel on channel siltation. Port & Waterway Engineering (in Chinese), (8): 111–116. doi: 10.16233/j.cnki.issn1002-4972.20190805.018
    Kalkwijk J P T, Booij R. 1986. Adaptation of secondary flow in nearly-horizontal flow. Journal of Hydraulic Research, 24(1): 19–37. doi: 10.1080/00221688609499330
    Li Mengguo, Mai Miao, Li Wendan, et al. 2015. Study on harbor-constructing conditions in Jiaojiang River Estuary and Taizhou Bay. Journal of Waterway and Harbor (in Chinese), 36(5): 369–377
    Li Yan, Pan Shaoming, Shi Xiaodong, et al. 1992. Recent sedimentary rates for the zone of the turbidity maximum in the Jiaojiang River Estuary. Journal of Nanjing University: Natural Sciences Edition (in Chinese), 28(4): 623–632
    Liu Haoran, Xu Kehui, Wilson C. 2020. Sediment infilling and geomorphological change of a mud-capped Raccoon Island dredge pit near Ship Shoal of Louisiana shelf. Estuarine, Coastal and Shelf Science, 245: 106979,
    Martelo A F, Trombetta T B, Lopes B V, et al. 2019. Impacts of dredging on the hydromorphodynamics of the Patos Lagoon estuary, southern Brazil. Ocean Engineering, 188: 106325. doi: 10.1016/j.oceaneng.2019.106325
    Mateo-Pérez V, Corral-Bobadilla M, Ortega-Fernández F, et al. 2020. Port bathymetry mapping using support vector machine technique and sentinel-2 satellite imagery. Remote Sensing, 12(13): 2069. doi: 10.3390/rs12132069
    Nguyen V T, Zheng Jinhai, Zhang Jisheng. 2013. Mechanism of back siltation in navigation channel in Dinh An Estuary, Vietnam. Water Science and Engineering, 6(2): 178–188. doi: 10.3882/j.issn.1674-2370.2013.02.006
    Obelcz J, Xu Kehui, Bentley S J, et al. 2018. Mud-capped dredge pits: An experiment of opportunity for characterizing cohesive sediment transport and slope stability in the northern Gulf of Mexico. Estuarine, Coastal and Shelf Science, 208: 161–169,
    Shen Qi, Huang Wenrui, Wan Yuanyang, et al. 2020. Observation of the sediment trapping during flood season in the deep-water navigational channel of the Changjiang Estuary, China. Estuarine, Coastal and Shelf Science, 237: 106632,
    Song Dehai, Wang Xiaohua, Kiss A E, et al. 2011. The contribution to tidal asymmetry by different combinations of tidal constituents. Journal of Geophysical Research: Oceans, 116(C12): C12007. doi: 10.1029/2011JC007270
    van Prooijen B C, Winterwerp J C. 2010. A stochastic formulation for erosion of cohesive sediments. Journal of Geophysical Research: Oceans, 115(C1): C01005. doi: 10.1029/2008JC005189
    Wang Xiaohua. 2002. Tide-induced sediment resuspension and the bottom boundary layer in an idealized estuary with a muddy bed. Journal of Physical Oceanography, 32(11): 3113–3131. doi: 10.1175/1520-0485(2002)032<3113:TISRAT>2.0.CO;2
    Wang Gaoyang. 2007. A 2D numerical simulation of suspended sediment in the Taizhou Bay (in Chinese) [dissertation]. Hangzhou: Zhejiang University
    Wang Xiaohua, Byun D S, Wang Xingli, et al. 2005. Modelling tidal currents in a sediment stratified idealized estuary. Continental Shelf Research, 25(5−6): 655–665. doi: 10.1016/j.csr.2004.10.013
    Wang Yaping, Gao Shu, Jia Jianjun. 2000. Flow structure in the marine boundary layer and bedload transport: A review. Marine Geology and Quaternary Geology (in Chinese), 20(3): 101–106. doi: 10.16562/j.cnki.0256-1492.2000.03.016
    Winterwerp J C. 2001. Stratification effects by cohesive and noncohesive sediment. Journal of Geophysical Research: Oceans, 106(C10): 22559–22574. doi: 10.1029/2000JC000435
    Wu Teng, Li Xiuxia. 2010. Vertical 2-d mathematical model of sediment silting in dredged channel. Journal of Hydrodynamics, 22(1): 605–609. doi: 10.1016/S1001-6058(10)60005-4
    Wu Hui, Shen Jian, Zhu Jianrong, et al. 2014. Characteristics of the Changjiang plume and its extension along the Jiangsu Coast. Continental Shelf Research, 76: 108–123. doi: 10.1016/j.csr.2014.01.007
    Xu Xuesong, Zhang Xinzhou, Li Qiong, et al. 2018. Simulation on flow-sediment characteristic and turbidity maximum zone in Jiao (Ling) River. Port & Waterway Engineering (in Chinese), (12): 134–142. doi: 10.16233/j.cnki.issn1002-4972.20181130.004
    Ye Taoyan, Li Li, Wang Yongxue, et al. 2019. Impacts of tidal flat reduction on suspended sediment dynamics in Hangzhou Bay. Journal of Tianjin University (Science and Technology) (in Chinese), 52(4): 392–403. doi: 10.11784/tdxbz201804092
    Zhang Hongwei. 2006. A two dimentional modeling suspended solids in the estuary of Jiaojiang River (in Chinese) [dissertation]. Hangzhou: Zhejiang University
    Zhao Xiaodong, Li Xiaoxiao, Luo Xiaofeng, et al. 2014. Study on the sediment deposition in Yuanyuansha reach of 12.5 m deepwater channel in Yangtze Estuary. Journal of Sediment Research (in Chinese), (6): 63–67. doi: 10.16239/j.cnki.0468-155x.2014.06.011
    Zhu Yongkang. 1986. Some characteristics of the Jiao Jiang mountain river estuary under strong tides in Zhejiang province. Geographical Research (in Chinese), 5(1): 21–31
    Zhu Jun, Weisberg R H, Zheng Lianyuan, et al. 2015. Influences of channel deepening and widening on the tidal and nontidal circulations of Tampa bay. Estuaries and Coasts, 38(1): 132–150. doi: 10.1007/s12237-014-9815-4
    Zhu Qin, Yang Shilun, Ma Yanxia. 2014. Intra-tidal sedimentary processes associated with combined wave-current action on an exposed, erosional mudflat, southeastern Yangtze River Delta, China. Marine Geology, 347: 95–106. doi: 10.1016/j.margeo.2013.11.005
    Žilinskas G, Janušaitė R, Jarmalavičius D, et al. 2020. The impact of Klaipėda Port entrance channel dredging on the dynamics of coastal zone, Lithuania. Oceanologia, 62(4): 489–500. doi: 10.1016/j.oceano.2020.08.002
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