List of top Water Engineering and Management Questions on Irrigation and Drainage Engineering

Choose the correct sequence of soil moisture constants for a soil after a heavy rain if no further water is added.

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: The distribution efficiency is an important parameter of uniform water application in surface irrigation method design. Reason R: The concept of uniformity coefficient used in sprinkler irrigation system design is similar to distribution efficiency in surface irrigation system. In the light of the above statements, choose the most appropriate answer from the options given below
• Both A and R are correct and R is the correct explanation of A
• Both A and R are correct but R is NOT the correct explanation of A
• A is correct but R is not correct
• A is not correct but R is correct

Consider the following units for measurement of salinity in irrigation water A. \(1\) mhos/m \(=\) \(1\) Siemens/m (s/m) B. \(1\) millimhos/cm \(=\) \(1\) deciSiemens/m (dS/m) C. \(1\) EC \(\times 10^{-3} = 1\) millimhos \(\per\) cm D. \(1\) EC \(\times 10^{-6} = 1\) micromhos \(\per\) cm E. meq/l \(= 10 \times\) EC \(\times 10^3\) Choose the correct answer from the options given below:

In a watershed of \(3000\) ha in flat topography, drainage coefficient was found to be \(5\) cm. If the drainage coefficient can be reduced to half by altering cropping pattern, what will be the discharge through drainage channel if both the condition are considered?

Consider the following for Crop Evapotranspiration estimation approaches A. Modified Blaney-Criddle method is only temperature based B. Modified Penman Monteith method requires more climate data C. Thornthwaite method is based on temperature data D. Crop coefficient is multiplied to get reference evapotranspiration by Pan evaporation method E. Radiation method requires air temperature and sunshine radiation Choose the correct answer from the options given below:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: The border and check basin method of irrigation have vertical movement of water whereas furrow irrigation have only lateral movement in soil. Reason R: The Kostiakov's infiltration function can be used to determine infiltration characteristic of soil. In the light of the above statements, choose the most appropriate answer from the options given below
• Both A and R are correct and R is the correct explanation of A
• Both A and R are correct but R is NOT the correct explanation of A
• A is correct but R is not correct
• A is not correct but R is correct

Under no wind conditions and at constant operating pressure the 100% overlapping is obtained when sprinklers are spaced at _____.

Choose the correct sequence for irrigation scheduling of crops using climatological approach. A. Reference ET, Crop Coefficient, Climate data, Crop ET, Irrigation efficiency, Irrigation time B. Crop ET, Reference ET, Crop Coefficient, Irrigation efficiency, Climate data, Irrigation time C. Irrigation time, Climate data, Crop coefficient, Reference ET, Crop ET, Irrigation efficiency D. Climate data, Reference ET, Crop coefficient, Crop ET, Irrigation efficiency, Irrigation time Choose the correct answer from the options given below:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: The total available water for plant growth (TAW) is the water between field capacity and ultimate wilting point. Reason R: The maximum allowable deficit (MAD) is a part of total available water (TAW) and is usually considered as \(50%\) of TAW. In the light of the above statements, choose the most appropriate answer from the options given below:
• Both A and R are correct and R is the correct explanation of A
• Both A and R are correct but R is NOT the correct explanation of A
• A is correct but R is not correct
• A is not correct but R is correct

A soil is having a field capacity of \(42%\) and permanent wilting point of \(19%\). If irrigation has to be done at \(40%\) depletion of available moisture, at what soil moisture percentage the field is to be irrigated?

Using current meter for measuring flow velocity in a stream having depth of \(1 \, \text{m}\), the observation readings should be taken at:
• at \(0\) depth of flow
• at \(0\) and \(0.2\) depth of flow
• at \(0.2\) and \(0.6\) depth of flow
• at \(0.2\) and \(0.8\) depth of flow

Which of the following irrigation methods has been developed in Israel?

The ratio of water stored in the root zone during irrigation to the water needed in the root zone prior to irrigation is called:

The moisture held by a well-drained soil against gravity drainage, by the force of surface tension between soil grains and water drops, is called:

Addition of gypsum to the irrigation water is recommended to overcome difficulties posed by: