Tạp chí Khoa học ĐHQGHN, Khoa học Tự nhiên và Công nghệ 29, Số 1S (2013) 27-34 27     1  2 * 3  4  5 1 , ,  2  3 TThanh Xuân,  4 Vi, Nhà A27 -  5 ,    Tóm tắt.  nghiên       k     1. Mở đầu *               n                                           T, L (Mile và _______ * . -975853471. E-mail: thuybanguyen@gmail.com         máng sóng, Ippen, Goda, 1963[3], Horikawa và                   ình  T, L.                     Đ.Đ. Chiến và nnk. / Tạp chí Khoa học ĐHQGHN, Khoa học Tự nhiên và Công nghệ 29, Số 1S (2013) 27-34 28                                 S. Hsiao và Hui M. F, 2005                          Nguyên nhân gây m            sóng                                            trùng       cao               còn                                     Nagasaki-                                                                 2. Hiện tượng dao động mực nước dị thường trong cảng biển và nguyên nhân hình thành       cao                                                                                 Đ.Đ. Chiến và nnk. / Tạp chí Khoa học ĐHQGHN, Khoa học Tự nhiên và Công nghệ 29, Số 1S (2013) 27-34 29  do TS. Bùi Xuân                                                                                                    TP Tuy Hòa-                                      VNexpress). Hình 1. - Phú Yên ngày  .                                                       7]. Hình 2 (a) và (b)                     -           êng (Abiki waves).    Đ.Đ. Chiến và nnk. / Tạp chí Khoa học ĐHQGHN, Khoa học Tự nhiên và Công nghệ 29, Số 1S (2013) 27-34 30                         U C                           Tuy nhiê                 . Hình 2. -Abiki waves) Rabinovich, 2009 [7]). 3. Mô hình tính toán dao động mực nước trong cảng biển          9    )2( 02 2222 37 2 2                                                                   x Q yy Q yx Q x QQQQQQ d gn x gd d QQ yd Q xt Q y e x e x e yxxyxx yx xx    (3) 02 2222 37 2 2                                                                     y Q xx Q xy Q y QQQQQQ d gn y gd d Q yd QQ xt Q x e y e y e yxyyxy yyxy    0         y Q x Q t y x (1) Đ.Đ. Chiến và nnk. / Tạp chí Khoa học ĐHQGHN, Khoa học Tự nhiên và Công nghệ 29, Số 1S (2013) 27-34 31 , Q x (m 3 /s) và Q y (m 3 /s)    x và y, t (s)    d (m)     (d=h+  ), h     ,  (m)    trung bình, g(m/s 2 ) ,  là    , n (m/s 1/3 )     (n=0.025 trong tính toán này) và v e  SDS à Jagi (1998) [10]              Sin                       bà9,11]. 4. Kết quả tính toán hệ số dao động mực nước trong cảng biển Tuy Hòa                                                   nhân                        thành p-                    quan t                 B                     sóng gâ              t ra trong                              H i       -2400s)                            R m  ). Phân  óng T        òa. Đ.Đ. Chiến và nnk. / Tạp chí Khoa học ĐHQGHN, Khoa học Tự nhiên và Công nghệ 29, Số 1S (2013) 27-34 32    .                                                R m ) và R m ).                     R m  16).                                Sin                -    lai. Trong                        Đ.Đ. Chiến và nnk. / Tạp chí Khoa học ĐHQGHN, Khoa học Tự nhiên và Công nghệ 29, Số 1S (2013) 27-34 33   5. Kết luận                      Nagasaky-                                                  . Hình 4.     T=1800s). Đ.Đ. Chiến và nnk. / Tạp chí Khoa học ĐHQGHN, Khoa học Tự nhiên và Công nghệ 29, Số 1S (2013) 27-34 34 Tài liệu tham khảo [1]        Journal of Waterway and Harbor Division, ASCE, Vol. 87, No. WW3,1961, pp. 111-139. , [2] Hwang, L-S. and Tuck, E. O., 1970. On the oscillations of harbours of arbitrary shape. J. Fluid Mech., 42: 447-464. [3] -Induced Oscillations in Harbor: the Solution for a Rectangular Harbor Connected to Open- Report No. 59, Hydrodynamic Lab., M. I. T., MA, U.S.A. [4] Horikawa, K., Shuto, N., and Nishimura, H., 1969. Characteristic oscillation of water in an L- shaped bay. Coastal Eng. in Japan, 12: 47-56. [5] Hsiao, S., S. and and Fang, H.,M, 2005. A drbem model for harbor oscillation with the effect of energy dissipation. Journal of the Chinese Institute of Engineers, Vol. 28, No. 4, 2005. 639- 646 [6] Jong, M.P.C., Seiche characteristics of Rotterdam Harbour. Coastal Engineering 51, 2004, 373 386. [7] Rabinovich, A., B.,. Seiches and Harbor Oscillations  Handbook of Coastal and Ocean Engineering (edited by Y.C.Kim), World Scientificc Publ., Singapore, 2009 [8]             [9] Thuy, N., B., Tanimoto, K., Tanaka, N., Harada K., Iimura, K Effect of open gap in coastal forest on tsunami Run-up - Investigations by experiment and numerical simulation, Ocean Engineering, Elsevier, 36 (2009), 12581269. [10] Nadaoka, K., Yagi, H.,. Shallow - water turbulence modeling and horizontal larger-eddy computation of river flow. Journal of Hydraulic Engineering, Vol. 124(5), 1998, pp. 493-500. [11]                     hìn       , trang 25-29. Study the risk of anomalous water level in harbor by numerical model Do Dinh Chien 1 1 1 , Nguyen Ba Thuy 2 , Nguyen Tho Sao 3 Vu Hai Dang 4 , Nguyen Thanh Trang 5 1 Vietnam Institute of Meteorology, Hydrology and Environment 23/62 Nguyen Chi Thanh Hanoi 2 National Center for Hydro-Meteorological Forecasting 4 Dang Thai Than, Hoan Kiem, Hanoi 3 VNU University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam 4 Institute of Marine Geophysics and Geology 18 Hoang Quóc Viet, Cau Giay, Hanoi 5 Center for Marine Hydrology , 62 Nguyen Chi Thanh Hanoi A numerical model based on the two-dimensional nonlinear long wave equations was applied to study the anomalous water level oscillation in the semi-enclosed seas, harbors. Test calculations with the different conditions of the period and the direction of wave propagation have been applied at Tuy Hoa harbor, where many times observed the phenomenon of anomalous high water level. Calculation results and analysis show that amplification factor of water level oscillation in harbor depends strongly on both the period and the direction of long wave propagation from offshore. In range of wave periods used in these calculations, there are always two peaks in variation of the amplification factors. At some points in harbor, water level can be 16 times higher than the water level at harbor mouth. Keywords: anomalous water level, Tuy Hoa. .      2. Hiện tượng dao động mực nước dị thường trong cảng biển và nguy n nhân hình thành     .  bà9,11]. 4. Kết quả tính toán hệ số dao động mực nước trong cảng biển Tuy Hòa          