Font size
WorksheetsDay 59-Nov 21-worksheet-Btech-Hydrograph&stream flow measurement
Total questions: 15
Worksheet time: 11mins
The rising limb of a hydrograph is mainly influenced by
Catchment shape
Storm characteristics
Vegetation
Baseflow depth
Which point indicates the end of surface flow contribution?
Peak point
Starting point
Inflection point on recession limb
Crest
A left-skewed hydrograph occurs when rainfall moves
Opposite to outlet
Perpendicular to watershed
Towards the outlet
Random
Fern-shaped catchments generally produce
Higher peak discharge
Lower time of concentration
Lower peak hydrograph
Steeper rising limb
Equilibrium discharge in S-curve method is
A/D
2.78⋅(A/D)
D/A
3.78⋅(A⋅D)
Attenuation in flood routing means
Lag between inflow and outflow peak
Increase in peak
Reduction in outflow peak
Shift in rising limb
Unit Hydrograph assumes effective rainfall is uniformly distributed over the catchment.
True
False
S-curve method can only be used when the number of steps n is an integer.
True
False
What is a hydrograph consisting only of surface runoff called?
(a)
What is the total time from the start to the end of runoff called?
(a)
What is the time between peak rainfall and peak discharge called?
(a)
Basin response that does not depend on time of rainfall occurrence is called.
(a)
Reduction in outflow peak compared to inflow peak is called.
(a)
If the base period of a 6-hr unit hydrograph of a basin is 84 hr, then the base period of a 12-hr unit hydrograph of the same basin will be ——-
(a)
Hydrograph is a graphical representation of ———-vs————
(a)
