Tài liệu Báo cáo " Nghiên cứu nguy cơ mực nước dâng dị thường trong cảng biển bằng mô hình số trị " ppt

Tạp chí Khoa học ĐHQGHN, Khoa học Tự nhiên và Công nghệ 29, Số 1S (2013) 27-34

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

 
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
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*
3


4

5

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, , 
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
3
TThanh Xuân, 
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Vi, Nhà A27 - 
5
, 


Tóm tắt. 
nghiên 



 

k 

 
1. Mở đầu
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     
       
n        
      
         
 
        
      T, L (Mile và
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. -975853471.
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
      
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

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         

         
         

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

































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

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

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
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

x
Q
yy
Q
yx
Q
x
QQQQQQ
d
gn
x
gd
d
QQ
yd
Q

xt
Q
y
e
x
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x
e
yxxyxx
yx
xx




(3) 02
2222
37
2
2



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

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
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xx
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



0
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(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
         
         
        
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        

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óng T
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



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
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        
         
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.