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28 December 2020 Sediment Budget of the Mouth Bar in the Yangtze Estuary Response to the Change of Marine Input Conditions: A Process-Based Model Approach
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Abstract

Chu, A.; Tai, J.; Chen, Y., and Wang, B., 2020. Sediment budget of the mouth bar in the Yangtze Estuary response to the change of marine input conditions: A process-based model approach. In: Hu, C. and Cai, M. (eds.), Geo-informatics and Oceanography. Journal of Coastal Research, Special Issue No. 105, pp. 36–41. Coconut Creek (Florida), ISSN 0749-0208.

The transition of upstream or open sea conditions eventually leads to the change of sediment budget in estuaries and results in its evolution. In this paper, marine facies change for the Yangtze Estuary has been investigated based on statistics and harmonic analysis on the observed water-level time series at stations. The sea-level rise (SLR) rate and the main tidal constituent change were obtained for the estuary. Scenarios were designed to represent change of input conditions for the process-based model of the estuary. The net sediment budget of the mouth bar area in the estuary was calculated according to the cumulative flux through the predefined controlling cross-sections. The results reveal that (1) the SLR in the coming two decades results in sediment demand increase in the mouth bar area and restrains the seaward export sediment; (2) amplitude of the M2 component increase slightly enhances seaward sediment export; and (3) the combination of SLR and M2 increase responses for sediment demand increase in the mouth bar area, and 1.5% more sediment export to sea.

©Coastal Education and Research Foundation, Inc. 2020
Ao Chu, Jiaai Tai, Yongping Chen, and Biao Wang "Sediment Budget of the Mouth Bar in the Yangtze Estuary Response to the Change of Marine Input Conditions: A Process-Based Model Approach," Journal of Coastal Research 105(sp1), 36-41, (28 December 2020). https://doi.org/10.2112/JCR-SI105-008.1
Received: 22 June 2020; Accepted: 19 July 2020; Published: 28 December 2020
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