Nghiên cứu xác định nguyên nhân gây triều cường cao kèm theo sóng lớn tại ven biển Tây Cà Mau

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Tác giả: Mạnh Hà Bùi, Đình Quyết Lê, Xuân Hiền Lê, Bá Thủy Nguyễn, Khánh Ngọc Phạm, Văn Tiến Phạm, Xuân Hưng Trịnh

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khí tượng Thủy văn, 2023

Mô tả vật lý: tr.45670

Bộ sưu tập: Metadata

ID: 339574

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In this study, the phenomenon and reason of spring tide accompanied high waves induced sea dike inundation and erosion in the West of Ca Mau province on August 2–3, 2019 is analyzed based on observation data at the marine weather station of Phu Quoc and Tho Chu, the hydrological station of Song Doc and the re–analysis data of wind and wave from ECMWF, the surge from HYCOM. In which, the Tho Chu and Phu Quoc stations are the only two marine weather stations in the Southwestern Sea area, the Song Doc hydrological station located about 1.5 km from the coastline can record the water rising from the sea. The results show that, the Song Doc station has recorded abnormally surge in the evening of August 02–03, 2019, caused by rising water from the sea. In the west coast of Ca Mau, high tide occurs simultaneously with surge and high wave due to strong wind, in which the swell is significant contribution to the total water level. The reason of surge with high waves in the study area is due to the strong the southwest monsoon, which persists for a long time in the area, most notably the strong wind in the northwest and southern areas of Cape Ca Mau, which has caused high swell. The results of the study are meaningful in monitoring, forecasting and warning of the spring tides and high waves in the area.Trong nghiên cứu này, hiện tượng và nguyên nhân triều cường cao kèm theo sóng lớn gây sạt lở để biển Tây Cà Mau trong ngày 2–3 tháng 8 năm 2019 được phân tích dựa theo số liệu quan trắc tại trạm khí tượng hải văn Phú Quốc và Thổ Chu, trạm thuỷ văn Sông Đốc và số liệu tái phân tích gió, sóng từ ECMWF và mực nước từ HYCOM. Trong đó, Thổ Chu và Phú Quốc là 2 trạm khí tượng hải văn thuộc đảo trên khu vực biển Tây Nam Bộ, trạm thuỷ văn Sông Đốc cách cửa biển khoảng 1,5 km, có thể ghi nhận được nước dâng từ cửa biển truyền vào. Kết quả cho thấy, số liệu quan trắc mực nước tại trạm thuỷ văn Sông Đốc đã ghi nhận nước dâng cao bất thường vào buổi chiều tối ngày 02–03 tháng 8 năm 2019, nguyên nhân do nước dâng từ cửa biển truyền vào. Tại ven biển Tây Cà Mau xuất hiện đồng thời thuỷ triều cao kèm theo nước dâng do gió và sóng lớn, trong đó sóng lừng có đóng góp rất đáng kể trong mực nước dâng tổng hợp. Nguyên nhân gây nước dâng kèm theo sóng lớn tại khu vực là do gió mùa Tây Nam mạnh, duy trì dài ngày trên khu vực, đáng chú ý nhất là vùng gió mạnh trên khu vực Tây Bắc và Nam Mũi Cà Mau đã gây những đợt sóng lừng cao. Kết quả của nghiên cứu có ý nghĩa trong giám sát, dự báo và cảnh báo hiện tượng triều cường cao bất thường, sóng lớn tại khu vực.

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