The total capacity of a reservoir is 25 million cubic metres and dead storage is 5 million cubic metres. If the average volume of sediment deposition is 0.10 million cubic metre per year, then the usefulness of the reservoir will start reducing after

Irrigation Engineering
The total capacity of a reservoir is 25 million cubic metres and dead storage is 5 million cubic metres. If the average volume of sediment deposition is 0.10 million cubic metre per year, then the usefulness of the reservoir will start reducing after

200 years

50 years

150 years

250 years

200 years

50 years

150 years

250 years

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Irrigation Engineering
The useful moisture of soil, is equal to its

Saturation capacity

Field capacity

Difference between filed capacity and permanent wilting point within the root zone of plants

Moisture content at permanent wilting point

Saturation capacity

Field capacity

Difference between filed capacity and permanent wilting point within the root zone of plants

Moisture content at permanent wilting point

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Irrigation Engineering
Cross regulators in main canals are provided

To overflow excessive flow water

To regulate water supply in the distributaries

To increase water head upstream when a main canal is running with low supplies

None of these

To overflow excessive flow water

To regulate water supply in the distributaries

To increase water head upstream when a main canal is running with low supplies

None of these

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Irrigation Engineering
V and R are the regime mean velocity and hydraulic mean depth respectively in meters. Lacey's silt factor f is

2V²/√3 R

2V²/5R

3V²/4R

5V²/2R

2V²/√3 R

2V²/5R

3V²/4R

5V²/2R

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Irrigation Engineering
Silt excluders are constructed on the

canal bed upstream of head regulator

canal bed downstream of head regulator

river bed upstream of head regulator

river bed downstream of head regulator

canal bed upstream of head regulator

canal bed downstream of head regulator

river bed upstream of head regulator

river bed downstream of head regulator

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Irrigation Engineering
If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be

1 + (0.9)010

1/(1+ 0.9010)

1/(1-0.9°10)

1 – (0.9)°l0

1 + (0.9)010

1/(1+ 0.9010)

1/(1-0.9°10)

1 – (0.9)°l0

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Irrigation Engineering

Irrigation Engineering The total capacity of a reservoir is 25 million cubic metres and dead storage is 5 million cubic metres. If the average volume of sediment deposition is 0.10 million cubic metre per year, then the usefulness of the reservoir will start reducing after

Irrigation Engineering The useful moisture of soil, is equal to its

Irrigation Engineering Cross regulators in main canals are provided

Irrigation Engineering V and R are the regime mean velocity and hydraulic mean depth respectively in meters. Lacey's silt factor f is

Irrigation Engineering Silt excluders are constructed on the

Irrigation Engineering If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be

Irrigation Engineering
The total capacity of a reservoir is 25 million cubic metres and dead storage is 5 million cubic metres. If the average volume of sediment deposition is 0.10 million cubic metre per year, then the usefulness of the reservoir will start reducing after

Irrigation Engineering
The useful moisture of soil, is equal to its

Irrigation Engineering
Cross regulators in main canals are provided

Irrigation Engineering
V and R are the regime mean velocity and hydraulic mean depth respectively in meters. Lacey's silt factor f is

Irrigation Engineering
Silt excluders are constructed on the

Irrigation Engineering
If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be