Patent ID: 11866897
Assignee: CHINA THREE GORGES CORPORATION
Field: Civil engineering (Other fields)
Classification: CPC E  G  Y | IPC E

Claim 3:
4. The main stream reservoir ecological modulation method considering incoming water from interval tributaries according to claim 1, wherein,
in Step 2, a formula of the river flow calculation is, Q
      
       down
       ,
       2
      
     
     =
     
      
       
        d
        0
       
       ⁢
       
        Q
        
         up
         ,
         2
        
       
      
      +
      
       
        d
        1
       
       ⁢
       
        Q
        
         up
         ,
         1
        
       
      
      +
      
       
        d
        2
       
       ⁢
       
        Q
        
         down
         ,
         1
        
       
      
     
    
   
   
    
     (
     1
     )
    
   
  
 

 
  
   
    d
    0
   
   =
   
    
     (
     
      1
      +
      a
     
     )
    
    ⁢
    
     
      
       
        1
        2
       
       ⁢
       Δ
       ⁢
       t
      
      -
      kx
     
     
      k
      -
      kx
      +
      
       
        1
        2
       
       ⁢
       Δ
       ⁢
       t
      
     
    
   
  
  ,
  
   
    d
    1
   
   =
   
    
     (
     
      1
      +
      a
     
     )
    
    ⁢
    
     
      
       
        1
        2
       
       ⁢
       Δ
       ⁢
       t
      
      +
      kx
     
     
      k
      -
      kx
      +
      
       
        1
        2
       
       ⁢
       Δ
       ⁢
       t
      
     
    
   
  
  ,
 

 
  
   d
   2
  
  =
  
   
    (
    
     1
     +
     a
    
    )
   
   ⁢
   
    
     k
     -
     
      
       1
       2
      
      ⁢
      Δ
      ⁢
      t
     
     -
     kx
    
    
     k
     -
     kx
     +
     
      
       1
       2
      
      ⁢
      Δ
      ⁢
      t
     
    
   
  
 

where Qdown,2 is an interval end flow of a downstream spawning ground controlled section, Qup,2 is an interval end flow of a upstream main stream-tributary-joint section, Qup,1 is an interval beginning flow of an upstream main stream-tributary-joint section, Qup,1 is an interval beginning flow of a downstream spawning ground controlled section, Δt is a calculation interval, k is a storage flow-discharge relationship curve, x is a flow proportion factor, a is a contribution ratio of the incoming water of interval tributaries to the joint section, and coefficients of the river flow calculation d0, d1 and d2 are calibrated by Least Square Method according to the long series of flow measured over many years.