A. tipping bucket type
B. weighing type
C. floating type
D. Simon’s raingauge
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A 70% index of wetness means_______________?
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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. rain excess of 30%
B. rain deficiency of 30%
C. rain deficiency of 70%
D. none of the above
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Unit of runoff in M.K.S. system is________________?
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
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The area between the isohyets 45 cm and 55 cm is 100 square km and between 55 cm and 65 cm is 150 square km. The average depth of annua! precipitation over the above basin of 250 square km will be__________________?
A. cubic metre/sec
B. metre/sec
C. cubic metre
D. square metre
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If it rains between 2 P.M. and 3 P.M. and the entire basin area just starts contributing water at 3 P.M. to the outlet, then time of concentration will be_____________________?
A. 50 cm
B. 55 cm
C. 56 cm
D. 60 cm
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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. 15 minutes
B. 20 minutes
C. 30 minutes
D. 60 minutes
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The unit hydrograph due to a storm may be obtained by dividing the ordinates of the direct runoff hydrograph by_______________?
A. 70mm
B. 80mm
C. 90 mm
D. 105 mm
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S-hydrograph is used to obtain unit hydrograph of________________?
A. direct runoff volume
B. period of storm
C. total rainfall
D. none of the above
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Dimensions of coefficient of transmissibility are______________?
A. shorter duration from longer duration
B. longer duration from shorter duration
C. both (A) and (B)
D. none of the above