Patent ID: 11868690
Assignee: PEARL RIVER WATER RESOURCES RESEARCH INSTITUTE
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 4:
5. The method for analyzing the disaster prevention and mitigation effectiveness of the ecological seawall according to claim 1, wherein the calculating the two-dimensional bed surface change index according to the suspended load sediment transportation volume and the bed load sediment transportation volume comprises:
determining a sediment exchange volume in the vertical direction according to the suspended load sediment transportation volume;
determining the sediment transportation volume in the horizontal direction according to the bed load sediment transportation volume; and
calculating a coastal bed surface change index according to the sediment exchange volume and the sediment transportation volume by using a preset coastal bed surface change formula:, C
   =
   
    
     
      (
      
       1
       -
       p
      
      )
     
     ⁢
     
      
       ∂
       
        h
        k
       
      
      
       ∂
       1
      
     
    
    +
    
     f
     ⁡
     (
     
      
       
        ∂
        
         q
         x
        
       
       
        ∂
        x
       
      
      +
      
       
        ∂
        
         q
         y
        
       
       
        ∂
        y
       
      
      +
      E
      +
      D
     
     )
    
   
  
  ;
 

wherein C represents the coastal bed surface change index, p represents the porosity of the coastal bed surface, hk represents an elevation of the coastal bed surface, ∂ represents a partial derivative sign, f represents a terrain acceleration factor, l represents a time step, qx represents a bed load sediment transportation volume in the direction of x, qy represents a bed load sediment transportation volume in the direction of y, E represents the sediment exchange volume and D represents the sediment transportation volume.