The rainfall on five successive days on a catchment was 3, 6, 9, 5 and 1 cm respectively. If the Ø-index for the storm can be assumed to be 3 cm/day, the total direct runoff from the catchment due to this storm is:

1.  11 cm

2.  24 cm

3.  9 cm

4.  20 cm

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4
Correct Answer :

11 cm


Explanation :
No Explanation available for this question

The excess runoff hydrograph from a catchment area 10km2 due to a storm of 6hrs duration has been observed to be triangular in shape. The peak flow is observed to be 10m3/s and the base length is 20hrs. The rainfall excess in the catchment is:

1.  5.1 cm

2.  3.6 cm

3.  4.5 cm

4.  2.5 cm

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4
Correct Answer :

3.6 cm


Explanation :
No Explanation available for this question

Consider the following statements: 1. Over the oceans there is more evaporation than precipitation. 2. On land it is more precipitation than evapo-transpiration. Which of these statements are correct

1.  Both 1 & 2

2.  Neither 1 nor 2

3.  1 only

4.  2 only

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4
Correct Answer :

Both 1 & 2


Explanation :
No Explanation available for this question

The hydrologic risk of a 100-year flood occurring during the 2-year service life of a project is:

1.  9.8%

2.  9.9%

3.  19.9%

4.  1.99%

View Answer  
4
Correct Answer :

1.99\%


Explanation :
No Explanation available for this question

The design flood commonly adopted in India for barrages and minor dams is:

1.  Probable maximum flood

2.  A flood of 50 – 100 years return period

3.  Peak flood

4.  Standard project flood or a 100-year flood, whichever is higher

View Answer  
4
Correct Answer :

Standard project flood or a 100-year flood, whichever is higher


Explanation :
No Explanation available for this question

The Muskingum method of flood routing is a:

1.  Form of hydraulic routing of a flood

2.  Form of reservoir routing

3.  Complete numerical solution of St. Venant equations

4.  Hydrological channel routing method

View Answer  
4
Correct Answer :

Hydrological channel routing method


Explanation :
No Explanation available for this question

What would be the volume of water stored in a saturated column with a porosity of 0.35 with a cross-sectional area of 1m2 and depth of 3m

1.  2.0 m3

2.  0.105 m3

3.  1.05 m3

4.  3.0 m3

View Answer  
4
Correct Answer :

1.05 m3


Explanation :
No Explanation available for this question

The surface joining the static levels in several non-pumping wells penetrating a continuous confined aquifer represents:

1.  Water-table surface

2.  Capillary fringe

3.  Piezometric surface of the aquifer

4.  Physical top surface of the aquifer

View Answer  
4
Correct Answer :

Piezometric surface of the aquifer


Explanation :
No Explanation available for this question

Two observation wells penetrating into a confined aquifer are located 1500 m apart in the direction of flow. Heads of 50 m and 25 m are indicated at these two observation wells. If the coefficient of permeability for the aquifer is 30 m/day and its porosity is 0.25, the time of travel of an inert tracer from one well to another is

1.  75 days

2.  750 days

3.  1200 days

4.  3000 days

View Answer  
4
Correct Answer :

750 days


Explanation :
No Explanation available for this question

The local scour depth in front of a semicircular shaped rectangular pier having width equal to W aligned parallel to the flow below the surrounding bed is:

1.  2.0 W

2.  1.5 W

3.  1.2 W

4.  1.0 W

View Answer  
4
Correct Answer :

1.2 W


Explanation :
No Explanation available for this question
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