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

Claim 2:
3. The method for analyzing the disaster prevention and mitigation effectiveness of the ecological seawall according to claim 1, wherein the calculating the wave-flow bottom shear stress of the target ecological seawall by using the preset coastal hydrodynamic model comprises:
obtaining a roughness height of sediment particles, a roughness height of a sediment transport and a roughness height of a coastal bed surface form of the target ecological seawall;
calculating a roughness height of the wave-flow bottom of the target ecological seawall by using a preset roughness height formula according to the roughness height of the sediment particles, the roughness height of the sediment transport and the roughness height of the coastal bed surface form;

h=hs+hb+hf;

wherein h represents the roughness height of the wave-flow bottom, hs represents the roughness height of the sediment particles, hb represents the roughness height of the sediment transport and hf represents the roughness height of the coastal bed surface form;
determining a pure water-flow bottom shear stress and a pure wave bottom shear stress according to the roughness height of the wave-flow bottom; and
calculating the wave-flow bottom shear stress according to the pure water-flow bottom shear stress and the pure wave bottom shear stress by using a preset bottom shear stress formula:, δ
   =
   
    
     δ
     s
    
    [
    
     1
     +
     
      
       1
       .
       2
      
      ⁢
      
       
        (
        
         
          δ
          z
         
         
          
           δ
           s
          
          +
          
           δ
           z
          
         
        
        )
       
       3.2
      
     
    
    ]
   
  
  ;
 

wherein δ represents the wave-flow bottom shear stress, δs represents the pure water-flow bottom shear stress, and δz represents the pure wave bottom shear stress.