NGHIÊN CỨU BIẾN ĐỘNG THEO MÙA CỦA CHẾ ĐỘ THỦY ĐỘNG LỰC KHU VỰC CỬA SÔNG NHẬT LỆ TỈNH QUẢNG BÌNH

Abstract

Nhat Le estuary is located in the Southeast of Dong Hoi city, Quang Binh province. In recent years, there are big changes in this estuary: deposition in river channel, erosion in the North and South coastline. This paper presents some research results on hydrodynamic characteristics of Nhat Le estuaries based on data analysis and simulation results of 2D hydrodynamic model. The results show that the hydrodynamic regime of the Nhat Le estuary varied seasonally by Northeast monsoon and Southwest monsoon. Two factors, including wave and tide cause littoral currents and morphological change in the Nhat Le estuary in which wave are the main factor. River flow factor only dominate during times when discharge of floods are significant.