# A mean annual runoff 2 m3/s from a catchment of area 10km2 represents an effective rainfall of nearly:

1.  530 cm

2.  590 cm

3.  630 cm

4.  658 cm

4

630 cm

Explanation :
No Explanation available for this question

# Steep rise in the flow-mass curve during a certain period indicates:

1.  Very high evaporation losses during that period

2.  Flash floods during that period

3.  Sudden spurt in irrigation demand during that period

4.  Sudden rise in demand for water to meet hydropower generation.

4

Flash floods during that period

Explanation :
No Explanation available for this question

# A rise crop is to be irrigated in a field covering an area of 2400 ha, the duty and base period of rice are given as 860 ha/cumec and 120 days respectively. The volume of water required in the field is nearly:

1.  500 ha-m

2.  1400 ha-m

3.  2000 ha-m

4.  2880 ha-m

4

2880 ha-m

Explanation :
No Explanation available for this question

# In an irrigation project, in a certain year, 70% and 46% of the cultural command area in Kharif and Rabi, respectively, remained without water and rest of the area got irrigation water. The intensity of irrigation in that year for the project was:

1.  116%

2.  84%

3.  42%

4.  58%

4

84\%

Explanation :
No Explanation available for this question

# The gross command area for a distributary is 5000 hectares, 80% of which is cultural irrigable. The intensity of irrigation for Rabi is 50% and for Kharif is 30%. The average duty at the head of the distributary is 2000 hectares/ cumec for Rabi season and 900 hectares/cumec for Kharif season. The discharge required at the head of the distributary from average demand considerations is:

1.  1.00 cumecs

2.  1.33 cumecs

3.  2.33 cumecs

4.  3.33 cumecs

4

1.33 cumecs

Explanation :
No Explanation available for this question

# Due to continuous pumping for 7hrs from a catchment of 25 ha, having porosity of 30% and specific retention of 10%, groundwater level dropped by 1m. The corresponding change in storage is:

1.  7.5 ha-m

2.  0.75 ha-m

3.  1.87 ha-m

4.  0.187 ha-m

4

0.187 ha-m

Explanation :
No Explanation available for this question

# As recommended by Sichardt, the radius of influence is :

1.  Inversely proportional to drawdown

2.  Linearly proportional to drawdown

3.  Independent of drawdown

4.  Proportional to square root of drawdown

4

Linearly proportional to drawdown

Explanation :
No Explanation available for this question

# Consider the following statements: 1. A regime channel will have side slopes of value 0.5H : 1V. 2. Lacey’s regime formula is applicable to regime channels with sediment concentration more than 5000 ppm. 3. For a Lacey regime channel the Manning roughness coefficient is estimated by Strickler’s formula 4. The mean velocity in a Lacey channel is proportional to R2/3. Where R = hydraulic radius. Which of these statements are correct

1.  1 and 2

2.  1 and 4

3.  2 and 3

4.  3 and 4

4

1 and 4

Explanation :
No Explanation available for this question

# The minimum size of gravel that will not move in the bed of a wide rectangular channel of depth 0.8 m and longitudinal slope 0.0041 is:

1.  11 mm

2.  23 mm

3.  36 mm

4.  57 mm

4

36 mm

Explanation :
No Explanation available for this question

1.  1, 2 and 3

2.  1 and 2 only

3.  2 and 3 only

4.  1 and 3 only

4