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Bài viết sử dụng mô hình một chiều (MIKE 11) mô phỏng dòng chảy trong sông cung cấp lưu lượng, độ đục làm biên đầu vào cho mô hình Delft3D. MIKE 11 là một phần mềm kỹ thuật chuyên dụng, được ứng dụng để mô phỏng chế độ thủy văn thủy lực, chất lượng nước và vận chuyển bùn cát ở cửa sông, trong sông, hệ thống tưới, kênh dẫn và các hệ thống dẫn nước khác. | Nghiên cứu ảnh hưởng của chế độ thủy - thạch động lực đến biến động địa hình vùng cửa sông Cửa Đại tỉnh Quảng Nam Vietnam Journal of Marine Science and Technology Vol. 19 No. 3B 2019 105 112 DOI https doi.org 10.15625 1859-3097 19 3B 14518 https www.vjs.ac.vn index.php jmst Research on effects of geo-hydrodynamics on topographic changes in the estuary of Cua Dai Quang Nam province Dao Dinh Cham1 Nguyen Quang Minh1 Nguyen Thai Son1 Tran Tuan Dung2 1 Institute of Geography VAST Vietnam 2 Institute of Marine Geology and Geophysics VAST Vietnam E-mail chamvdl@gmail.com Received 25 July 2019 Accepted 6 October 2019 2019 Vietnam Academy of Science and Technology VAST Abstract Accretion and erosion processes recorded in the estuary of Cua Dai Quang Nam province from 2014 to present have directly affected the issues of flooding drainage system waterway traffic aquaculture and seafood exploitation services. These have been drawing special attentions of national and international scientists. So far several solutions are implemented to overcome these problems such as concreted embankments or dredging operations of the channel to open the sea. The solutions however are just temporary to solve immediate situations but not long-term. As a result of passive solutions the shoreline is still seriously eroded and then the estuary of Cua Dai is re-accreted. Annually Vietnam government and local offices still spend a large budget and time for recovering and minimizing the effects of such catastrophes without long-term effectiveness. One of the main causes of erosion and accretion of the Cua Dai estuary is hydrodynamic factors and the complex of sediment transportation. The results show that the northeast waves with high frequency and intensity in combination with floods during the Northeast monsoon are considered to be main causes. The accretion of estuary and formation of Dinosaur island in front of Cua Dai estuary is partly due to the combined sediment sources caused by the .
