Study on the morphological evolution of the Modaomen Estuary in monthly scale

Jia Liangwen; L&#252; Xiaoying; Cheng Cong; He Zixiao

doi:10.3969/j.issn.0253-4193.2018.09.006

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Jia Liangwen, Lü Xiaoying, Cheng Cong, He Zixiao. Study on the morphological evolution of the Modaomen Estuary in monthly scale[J]. Haiyang Xuebao, 2018, 40(9): 65-77. doi: 10.3969/j.issn.0253-4193.2018.09.006

Citation:

Jia Liangwen, Lü Xiaoying, Cheng Cong, He Zixiao. Study on the morphological evolution of the Modaomen Estuary in monthly scale[J]. Haiyang Xuebao, 2018, 40(9): 65-77. doi: 10.3969/j.issn.0253-4193.2018.09.006

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Study on the morphological evolution of the Modaomen Estuary in monthly scale

doi: 10.3969/j.issn.0253-4193.2018.09.006

1.
School of Marine Science, Sun Yat-Sen University, Guangzhou 510275, China
2.
Research Centre for the Marine Development and Planning of the Guangdong Province, Guangzhou 510220, China

Received Date: 2018-01-30
Rev Recd Date: 2018-03-21

Abstract

Abstract

The 2D wave and current coupled model is established and applied to simulate the morphological evolution of the Modaoment Estuary in monthly scale. The main findings are as follows:(1)In the dry season, the siltation dominates in the estuary without wave,however, siltation turns into erosion in the estuary with current and wave coupled. In the flood season, the siltation dominates in the estuary without wave except erosion in the west main tributary, with current and wave coupled, the siltation still dominates except that siltation turns into erosion in the inner slope and center of the mouth bar with the amount of the siltation reduced. (2)The magnitude of the monthly morphological change is centimeter level with the significant seasonal variation. The siltation dominates in the Modaomen Estuary without wave both the dry season and the flood season, with the larger siltation in the flood season. After the wave and current coupled, siltation dominates in the flood season while erosion dominates in the dry season. (3)Spatially, the outer slope of the mouth bar is silted in the flood season, and eroded in the dry season, the inner slope of the mouth bar is eroded both the flood season and the dry season, the top of the mouth bar is silted in the flood season and little changed in the dry season. In addition, the tidal induced bottom shear stress is dominant in the inner slope of the mouth bar, and wave induced bottom shear stress is dominant in the outer slope of the mouth bar.
- Modaomen Estuary,
- wave-current interaction,
- morphological evolution,
- monthly scale

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References

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