A. increase in intensity of rain
B. increase in infiltration capacity
C. increase in permeability of soil
D. all of the above
Related Mcqs:
- A 6 hours storm had 4 cm of rainfall and the resulting runoff was 2 cm. If <j) index remains at the same value, the runoff due to 10 cm of rainfall in 12 hours in the catchment is___________________?
A. 4.5 cm
B. 6.0 cm
C. 7.5 cm
D. 9.0 cm - Unit of runoff in M.K.S. system is________________?
A. cubic metre/sec
B. metre/sec
C. cubic metre
D. square metre - The unit hydrograph due to a storm may be obtained by dividing the ordinates of the direct runoff hydrograph by_______________?
A. direct runoff volume
B. period of storm
C. total rainfall
D. none of the above - A runoff river plant is____________?
A. a low head scheme
B. a medium head scheme
C. a high head scheme
D. none of the above - A runoff river plant_________________?
A. is a medium head scheme
B. generates power during peak hours only
C. is suitable only on a perennial river
D. has no pondage at all - Rate of evaporation from a water surface increases if_________________?
1) difference of vapour pressure between water and air is increased
2) velocity of wind is decreased
3) concentration of soluble solids in water is decreased
The correct answer is?A. (1) and (i2)
B. (2) and (3)
C. (2) and (3)
D. (1), (2) and (3) - The “outlet discharge factor” is the duty at the head of_________________?
A. main canal
B. branch canal
C. watercourse
D. distributory - The main function of a divide wall is to_______________?
A. control the silt entry in the canal
B. prevent river floods from entering the canal
C. separate the undersluices from weir proper
D. provide smooth flow at sufficiently low velocity - If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be__________________?
A. 1 + (0.9)010
B. 1 – (0.9)°l0
C. 1/(1-0.9°10)
D. 1/(1+ 0.9010) - The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are_________________?
A. at right angle and parallel to weir crest
B. parallel and at right angle to weir crest
C. parallel to weir crest in both
D. at right angle to weir crest in both
