A long-term numerical model of morphodynamic evolution and its application to the Modaomen Estuary |
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| Authors: | Wen-yuan Mo Xing Wei Li-guo Qiu |
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| Institution: | a,b a School of Environmental Science and Engineering of Sun Yat-Sen University,Guangzhou 510275,China b Hainan Marine Development Plan and Design Institute,Haikou 570125,China c Key Laboratory of Tropical Marine Environmental Dynamics,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China |
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| Abstract: | Because of the influence of human activities, the evolution of the Modaomen Estuary is no longer a purely natural process.
We used a long-term morphodynamic model (PRD-LTMM-10) to study the evolution of the estuary from 1977 to 1988. The model incorporated
modules for riprap-siltation promotion and waterway dredging. The model can simulate the morphodynamic evolutionary processes
occurring in the Modaomen Estuary during the period of interest. We were able to isolate the long-term influences of various
human engineering activities and the roles of natural factors in estuarine evolution. The governance projects had the largest
effect on the natural development of the estuary, resulting in larger siltation on the west side. Installation of riprap and
reclamation of submerged land resulted in scouring of the main Hengzhou Channel causing deep trough out-shift. Severe siltation
narrowed the upper end of the Longshiku Deep Trough. |
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| Keywords: | Modaomen Estuary long-term model evolution |
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