| 1. | TRENCH TYPE DIVERSION WEIR |
| | FULL SUPPLY LEVEL | m |
| | DEPTH OF WEIR | m |
| | BED LEVEL AT WEIR | m |
| | DESIGN DISCHARGE | cumecs |
| | DISCHARGE 50% FOR FLUSHING | cumecs |
| a) | LOSSES AT TRASH RACK |
| | Length of the Opening | m |
| | Width of the opening | m2 |
| | Gross Area of the trench | |
| | Trash Racks Flat Size |
| | Thickness of Flat | |
| | Clear Spacing of Flat | |
| | No of Flat | |
| | Say No of Flat | |
| | Trench Area reduction due to Trash Racks | |
| | net area after deduction of trash racks area | |
| | an Net area through the trash rack bar considering 50% clogging | |
| | at Gross area of the opening | |
| | Velocity at the entrance of Trash Racks as per IS code 11388 PAGE-1 | 0.75 |
| | Trash rack loss | |
| b) | Gate loss |
| | Velocity at gate | |
| | Gate loss hg | |
| c) | Entrance loss he | |
| | TOTAL LOSSES | |
| | HYDRAULIC GRADIENT LINE LEVEL AT TUNNEL INLET | |
| | BED LEVEL AT TUNNEL INLET | |
| 2) | FROM WEIR TO GRAVLE TRAP CUM DESILTING TANK (MS PIPE) |
| | DESIGN DISCHARGE | |
| | ADD 25% EXTRA FOR FLUSHING OF SILT PARTICALS | | 1 in |
| | TOTAL DISCHARGE for 50% | |
| | BED SLOPE OF PIPE | |
| | INTERNAL DIAMETER OF PIPE | |
| | RADIUS OF PIPE | |
| | AREA OF FLOW | |
| | WETTED PERIMETER | |
| | HYDRAULIC MEAN RADIUS | |
| | Manning, roughness coefficient | |
| | Hence, VELOCITY GENERATED | |
| | REQUIRED DISCHARGE | |
| | FLOW VELOCITY | |
| | HEAD LOSS DUE TO FRICTION |
| | LENGTH OF PIPE | |
| | REYNOLD NUMBER Re | |
| | FRICTIONAL COEFFICIENT f (Karman-Prandtle Eq.) |
| | Pipe Radius | |
| | Average Roughness | |
| | FRICTIONAL COEFFICIENT | |
| i) | HEAD LOSS DUE TO FRICTION | |
| iii) | Entrance & EXIT LOSS | |
| | TOTAL HEAD LOSSES | |
| | HEAD GAIN ON A/C OF GRADIENT | |
| | HEAD GAIN > TOTAL HEAD LOSSES | |
| | HYDRAULIC GRADIENT LINE LEVEL AT OUTLET | |
| | BED LEVEL AT OUTLET | |
| 3) | DESILTING TANK |
| | DESIGN DISCHARGE | |
| | ADD 25% FOR FLUSHING IN DESILTING TANK | |
| | REQUIRED DESIGN DISCHARGE | |
| | LENGTH | |
| | FRICTION FACTOR IN CONCRETE | |
| | WIDTH | |
| | EFFECTIVE DEPTH | |
| | WETTED AREA MID SECTION OF TANK | |
| | WETTED PERIMETER | |
| | FLOW VELOCITY<2m/SEC | |
| | OTHER LOSSES IN DESILTING TANK |
| a) | Transition loss ht at inlet |
| | Angle of expansion in the Tank | |
| | loss coeff for expansion | |
| | Velocity in the Tank | |
| | Transition loss ht | |
| b) | Transition loss at outlet ht |
| | Angle of contraction | |
| | (loss coeff for contraction varies from 0.1 - 0.5) | |
| | Velocity in the Tank | |
| | Flow Velocity | |
| | X-sectional area at outlet tunnel | |
| | Transition loss ht | |
| | TOTAL LOSSES | |
| | HYDRAULIC GRADIENT LINE LEVEL AT OUTLET | |
| | BED LEVEL AT OUTLET | |
| | HEAD AVAILABLE FOR ENTRANCE VELOCITY | |
| | CREST LEVEL OF SPILLWAY | |
| | MAX WATER LEVEL AT SPILL | |
| | TOP LEVEL OF THE TANK | | |
| 3) | FROM DESILTING TANK TO SURGE SHAFT / FOREBAY |
| | DESIGN DISCHARGE | | |
| | BED SLOPE OF PIPE | |
| | INTERNAL DIAMETER OF PIPE | |
| | AREA OF FLOW | |
| | WETTED PERIMETER | |
| | LENGTH OF PIPE | |
| | HYDRAULIC HEAD FOR INLET VELOCITY FROM FSL UP TO PIPE TOP | |
| | BELL MOUTH ENTRANCE k VALUE | |
| | BELL MOUTH ENTRANCE LOSS | |
| | INTERNAL DIA OF PIPE | |
| | HEAD UP TO CENTER OF PIPE | |
| | HEAD UP TO OUTLET OF PIPE | |
| | INTERNAL DIA OF PIPE | |
| | VELOCITY GENERATED AT OUTLET OF PIPE |
| | | |
| | FLOW VELOCITY IN THE PIPE | |
| | N is the number of bend | |
| | bend coeefficient at 90 degree bend for smooth pipe | |
| | HEAD LOSS DUE TO FRICTION |
| | LENGTH OF PIPE | |
| | Pipe Radius | |
| | (Average Roughness) For Wrought Iron & Steel | |
| | RELATIVE ROUGHNESS | |
| | FRICTION FACTOR FROM MOODY | |
| | HEAD LOSS DUE TO FRICTION Hf | |
| i) | HEAD LOSS DUE TO FRICTION Hf | |
| | VELOCITY GENERATED AT PIPE OUTLET | |
| | FLOW VELOCITY IN THE PIPE | |
| ii) | HEAD LOSS DUE TO BEND | |
| | DISCHARGE UP TO PIPE OUTLET | |
| | CAPACITY OF MS PIPE IS ADEQUATE | |
| i) | HEAD LOSS DUE TO ENTRANCE |
| | Entrance loss | |
| ii) | EXIT LOSS | |
| | TOTAL LOSSES IN THE PIPE | |
| | HYDRAULIC GRADIENT LINE LEVEL AT TUNNEL OUTLET | |
| | BED LEVEL AT THE TUNNEL OUTLET | |
| | RESIDUAL WATER HEAD AT TUNNEL OUTLET | |
| | TOTAL HYDRAULIC LOSSES | |
| | SAY TOTAL LOSSES | |
| | FULL SUPPLY LEVEL IN THE FOREBAY / SURGE SHAFT | |
| | WATER LEVEL & NET HEAD CALCULATION |
| | Water level at top of weir | |
| | center line of turbine at power house | |
| | Gross head available | |
