If B and d are the bed width and depth of a channel in meters, the combined losses due to evaporation and seepage in cumecs per kilometer length of the channel, is

For a standing crop, the consumptive use of water is equal to the depth of water

For a proportional outlet, the flexibility is

A hydraulic structure is designed to withstand

Attracting groynes are built

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

Lane's weighted creep theory assumes

Infiltration is the

Which of the following is a flexible outlet ?

As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at

The runoff increases with

As per Lacey’s theory, the silt factor is

The ratio of the rate of change of discharge of an outlet to the rate of change in level of water surface in a distributary at its normal depth, is known as

For supplying water to rabi crop, kharif crop and sugarcane, the channel is designed for a capacity equal to the greater of the water requirement of

Study the following statements.
i) Levees are constructed parallel to river flow,
ii) Spurs are constructed parallel to river flow,
iii) Levees are constructed transverse to river flow,
iv) Spurs are constructed transverse to river flow.
The correct answer is

Instantaneous unit hydrograph is a hydrograph of
i) unit duration
ii) unit rainfall excess
iii) infinitely small duration
iv) infinitely small rainfall excess
The correct answer is

Vertical drop fall is satisfactory for a height upto

In a chute spillway, the flow is usually

Groynes are generally built

Meandering of a river generally occurs, in

Optimum depth of kor watering for rice is

A river bend characterized by silting

To estimate the magnitude of a flood with a return period of T years, Gumbel’s distribution method requires the following data pertaining to annual flood series
i) mean value
ii) standard deviation
iii) length of record
iv) coefficient of skew
The correct answer is

Presence of tail water in a gravity dam
i) increases the principal stress
ii) decreases the principal stress
iii) increases the shear stress
iv) decreases the shear stress
The correct answer is

A current meter is used to measure the

To determine the discharge at a section in a stream from its rating curve, the required data are
i) slope of water surface at the section
ii) stage at the section
iii) current meter readings at the section
The correct answer is

Variability of rainfall is
i) largest in regions of high rainfall
ii) largest in coastal areas
iii) largest in regions of scanty rainfall
The correct answer is

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

When a canal and a drainage approach each other at the same level, the structure so provided, is

Interception losses are due to
i) evaporation
ii) transpiration
iii) stream flow
The correct answer is