Calculation of flow-rate for domestic sewer          
The app returns infos about water demand and sewage flow-rate                  
Number of users for sewer P (  )   800    
Dispersion coefficient e (  )  
   
Peak coefficient Cp (  )      
         
Minimum demand coefficient Cm (  )      
         
Min
Max
 Avg
Year average water demand d [l / (ab.d)]        
Year average flow-rate Q0 (l/sec)        
                 
Maximum hourly flow-rate Qm (l/sec)        
             
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