Influence Mechanism of Geomorphological Evolution in a Tidal Lagoon with Rising Sea Level
A tidal lagoon system has multiple environmental, societal, and economic implications. To investigate the mechanism of influence of the geomorphological evolution of a tidal lagoon, the effect of critical erosion shear stress, critical deposition shear stress, sediment settling velocity, and initial...
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MDPI AG
2022-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/10/1/108 |
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| author | Cuiping Kuang Jiadong Fan Zhichao Dong Qingping Zou Xin Cong Xuejian Han |
| author_facet | Cuiping Kuang Jiadong Fan Zhichao Dong Qingping Zou Xin Cong Xuejian Han |
| author_sort | Cuiping Kuang |
| collection | DOAJ |
| description | A tidal lagoon system has multiple environmental, societal, and economic implications. To investigate the mechanism of influence of the geomorphological evolution of a tidal lagoon, the effect of critical erosion shear stress, critical deposition shear stress, sediment settling velocity, and initial bed elevation were assessed by applying the MIKE hydro- and morpho-dynamic model to a typical tidal lagoon, Qilihai Lagoon. According to the simulation results, without sediment supply, an increase of critical erosion, deposition shear stress, or sediment settling velocity gives rise to tidal networks with a stable terrain. Such an equilibrium state can be defined as when the change of net erosion has little variation, which can be achieved due to counter actions between the erosion and deposition effect. Moreover, the influence of the initial bed elevation depends on the lowest tidal level. When the initial bed elevation is below the lowest tidal level, the tidal networks tend to be fully developed. A Spearman correlation analysis indicated that the geomorphological evolution is more sensitive to critical erosion or deposition shear stress than sediment settling velocity and initial bed elevation. Exponential sea level rise contributes to more intensive erosion than the linear or the parabolic sea level rise in the long-term evolution of a tidal lagoon. |
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| language | English |
| last_indexed | 2024-03-10T01:11:29Z |
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| spelling | doaj.art-9d6c5ff7095a454385c0b3723e5a89b12023-11-23T14:17:12ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-01-0110110810.3390/jmse10010108Influence Mechanism of Geomorphological Evolution in a Tidal Lagoon with Rising Sea LevelCuiping Kuang0Jiadong Fan1Zhichao Dong2Qingping Zou3Xin Cong4Xuejian Han5College of Civil Engineering, Tongji University, Shanghai 200070, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200070, ChinaTianjin Port Engineering Institute Co., Ltd. of CCCC First Harbor Engineering Co., Ltd., Tianjin 300461, ChinaThe Lyell Centre for Earth and Marine Science and Technology, Institute for Infrastructure and Environment, Heriot-Watt University, Edinburgh EH14 4AS, UKCollege of Civil Engineering, Tongji University, Shanghai 200070, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200070, ChinaA tidal lagoon system has multiple environmental, societal, and economic implications. To investigate the mechanism of influence of the geomorphological evolution of a tidal lagoon, the effect of critical erosion shear stress, critical deposition shear stress, sediment settling velocity, and initial bed elevation were assessed by applying the MIKE hydro- and morpho-dynamic model to a typical tidal lagoon, Qilihai Lagoon. According to the simulation results, without sediment supply, an increase of critical erosion, deposition shear stress, or sediment settling velocity gives rise to tidal networks with a stable terrain. Such an equilibrium state can be defined as when the change of net erosion has little variation, which can be achieved due to counter actions between the erosion and deposition effect. Moreover, the influence of the initial bed elevation depends on the lowest tidal level. When the initial bed elevation is below the lowest tidal level, the tidal networks tend to be fully developed. A Spearman correlation analysis indicated that the geomorphological evolution is more sensitive to critical erosion or deposition shear stress than sediment settling velocity and initial bed elevation. Exponential sea level rise contributes to more intensive erosion than the linear or the parabolic sea level rise in the long-term evolution of a tidal lagoon.https://www.mdpi.com/2077-1312/10/1/108MIKE modelgeomorphological evolutioninfluence mechanismQilihai Lagoon |
| spellingShingle | Cuiping Kuang Jiadong Fan Zhichao Dong Qingping Zou Xin Cong Xuejian Han Influence Mechanism of Geomorphological Evolution in a Tidal Lagoon with Rising Sea Level Journal of Marine Science and Engineering MIKE model geomorphological evolution influence mechanism Qilihai Lagoon |
| title | Influence Mechanism of Geomorphological Evolution in a Tidal Lagoon with Rising Sea Level |
| title_full | Influence Mechanism of Geomorphological Evolution in a Tidal Lagoon with Rising Sea Level |
| title_fullStr | Influence Mechanism of Geomorphological Evolution in a Tidal Lagoon with Rising Sea Level |
| title_full_unstemmed | Influence Mechanism of Geomorphological Evolution in a Tidal Lagoon with Rising Sea Level |
| title_short | Influence Mechanism of Geomorphological Evolution in a Tidal Lagoon with Rising Sea Level |
| title_sort | influence mechanism of geomorphological evolution in a tidal lagoon with rising sea level |
| topic | MIKE model geomorphological evolution influence mechanism Qilihai Lagoon |
| url | https://www.mdpi.com/2077-1312/10/1/108 |
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