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- 
- The water supply reservoir as shown in  
-      given figure has an average depth  
-      of 20m, a surface area of 20km^2,  
-      ans an outlet whose centerline is  
-      15m below the water surface.If the 
-       otflow diameter is 1 m, what is t 
-      he outflow and its associated velo 
-      city?What would be the drwa down d 
-      uring one week and one day periods 
-      ?                                  
- 
- Solution:   
- 
- Discharge   
- 
-    13.473642  
- 
- m^3/s   
- 
- Hence drop down in level for one day an 
-      d one week are:                    
- 
- draw down of one day   
- 
-    0.0582061  
- 
- m   
- 
- draw down of one week   
- 
-    0.4074429  
- 
- m