Water Resources Engineering and Hydrology MCQs

The peak of a 4 hour flood hydrograph is 240 m3/sec . If the rainfall excess is 80 mm and base flow which is constant is 40 m3/sec, then the peak of 4-hours unit hydrograph will be__________________?

by
A. 20 3/sec
B. 25 m3/sec
C. 30 m3/sec
D. 35 m3/sec
✅ The correct answer is option B.

The drainage water intercepting the canal can be disposed of by passing the canal below the drainage in___________________?

by
A. aqueduct and syphon aqueduct
B. aqueduct and super passage
C. super passage and canal syphon
D. level crossing
✅ The correct answer is option C.

The main cause of meandering is________________?

by
A. presence of an excessive bed slope in the river
B. degradation
C. the extra turbulence generated by the excess of river sediment during floods
D. none of the above
✅ The correct answer is option C.

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________________?

by
A. 50 mm
B. 60 mm
C. 90 mm
D. 140 mm
✅ The correct answer is option C.