Time allowed: Three Hours Maximum Marks: 200
SECTION –A
1.
Answer any FOUR sub-parts not exceeding 150
words for each sub-part:
(a)
What is meant by run-off? How is it produced?
Discuss various factors on which it depends.
(b)
At the beginning of a certain week, the depth of
water in an evaporation pan of 1.2m diameter was 7.75 cm. During the week, the
rainfall was 3.8cm and 2.5 cm of water in it within a fixed range. At the end
of the week, the gauge indicated a depth of 8.32 cm of water in the pan. Using
pan co-efficient as (0.7) estimate the evaporation during the week from the
surface of a reservoir under similar atmospheric conditions.
(c)
Design the notch dimensions of a wooden slab dam
to carry a peak flow of 0.8 cum/sec. the notch has rectangular opening. Width
of gully channel is 2.8m. Assume necessary data.
(d)
What are the basic components of permanent soil
conservation structures and explain their functions in brief.
(e)
Classify various sources of sediment in
reservoirs and write down three main types of bed load samplings commonly used
for estimating sediment flow rates.
2.
(A) On a 20 % hill slope, it is proposed to
construct terraces. If the vertical interval is 2 m, calculate:
(i)
Length per hectare,
(ii)
Volume of earth work and
(iii)
Area lost both for vertical cut and for batter
slope of 1: 1 the cut should be equal to fill.
(b) Write short notes on:
(i)
Contour trenching
(ii)
Stone terracing
(a)
Explain mechanics of wind erosion and mention
the factors influencing it.
3.
(a) What is the Universal Soil Loss Equation?
Explain in detail the various elements involved in the equation.
Explain n brief the factors affecting the soil loss.
(b) What are various criteria to be considered before proposing a project
on watershed management?
(c) Write short notes on:
(i)
Farm pond.
(ii)
Process of gully
development
(iii)
Spurs.
4.
(a) What do you mean by aerial photography and
how it can be used in watershed management programme?
(b) List out 10 main functions f command area development projects.
(c) Define the following terms:
(i)
Rain gauge
(ii)
Time of concentration
(iii)
Antecedent moisture condition.
(iv)
Runoff hydrograph.
(v)
Plane method.
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