The rainfall on five successive days were measured as 100 mm, 80 mm, 60 mm, 40 mm and 20 mm respectively. If the infiltration index or the storm loss rate for the catchment area is earlier estimated as 50 mm/day, the total surface run off will be________________?

Related Mcqs:

1. 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

2. If the intensity of rainfall is more than the infiltration capacity of soil, then the infiltration rate will be______________?

   A. equal to rate of rainfall
   B. equal to infiltration capacity
   C. more than rate of rainfall
   D. more than infiltration capacity

3. The normal annual precipitation at stations X, A, B and C are 700 mm, 1000 mm, 900 mm and 800 mm respectively. If the storm precipitation at three station A, B and C were 100 mm, 90 mm and 80 mm respectively, then the storm precipitation for station X will be___________________?

   A. 70mm
   B. 80mm
   C. 90 mm
   D. 105 mm

4. The maximum average depth due to one day storm over an area of 100 km2 is 100 mm. Depth-Area-Duration (DAD. curves indicate that for the same area of 100 km2 the maximum average depth for a 3 hour storm will be__________________?

   A. 100 mm
   B. more than 100 mm
   C. less than 100 mm
   D. none of the above

5. Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas. Reason R : Rainfall gradient is steep. Select your correct answer according to the coding system given below ?

   A. Both A and R are true and R is the correct explanation of A
   B. Both A and R are true but R is not the correct explanation of A
   C. A is true but R is false
   D. A is false but R is true

6. The maximum rainfall depth of 300 mm in 24 hours has a return period of 100 years. The probability of 24 hours rainfall equal to or greater than 300 mm occurring at least once in 10 years is given by_____________?

   A. (0.99)10
   B. 1 – (0.99)10
   C. (0.9)’00
   D. l-(0.9)100

7. Infiltration rate is always________________?

   A. more than the infiltration capacity
   B. less than the infiltration capacity
   C. equal to or less than the infiltration capacity
   D. equal to or more than the infiltration capacity

8. For a catchment area of 120 km2, the equilibrium discharge in m3/hour of an S-curve obtained by the summation of 6 hour unit hydro graph is_______________?

   A. 0.2 x 106
   B. 0.6 x 106
   C. 2.4 xlO6
   D. 7.2 xlO6

9. Infiltration capacity_________________?

   A. is a constant factor
   B. changes with time
   C. changes with location
   D. changes with both time and location

10. Infiltration is the_______________?

    A. movement of water through the soil
    B. absorption of water by soil surface
    C. both (A) and (B)
    D. none of the above