Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 5th Sem Old 150602 Hydrology And Water Resources Engineering Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (Old) EXAMINATION ? WINTER 2019
Subject Code: 150602 Date: 06/12/2019
Subject Name: Hydrology & Water Resources Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Describe a S-Hydrograph. Write the assumptions and its advantages. 07
(b) Explain working of Symons rain gauge with a neatly labelled sketch. 07
Q.2 (a) Discuss in short: 1) Water Harvesting techniques 2) Meteorological Drought 07
(b) For a storm of 3-hr duration, the rainfall rates are as follows:
Time Period
(minutes)
30 30 30 330 30 30
Rainfall Rate
(cm/hr)
1.5 3.5 4.5 3.2 2.0 1.0
If the surface runoff is 3.5cm, determine the ?-index and W-index.
07
OR
(b) Explain potential evapotranspiration and the methods to measure it. 07
Q.3 (a) Write a short note on Yield of a reservoir. Discuss the significance of useful life
of a reservoir.
07
(b) Write short notes on: i) Reservoir sedimentation ii) Spillways 07
OR
Q.3 (a) Discuss the factors affecting the selection of site for a dam. 07
(b) Discuss the classification of Hydro-Electric Power Plant with examples of each. 07
Q.4 (a) Explain the division of sub-surface water with a neatly labeled sketch. 07
(b) Find the ordinates of a storm hydrograph resulting from a 3 hrs storm with
rainfalls 0f 2.7, 6.45 and 3.55 cm during subsequent 3 hours intervals. The
ordinates of Unit Hydrograph are given below. Assume an initial loss of 5 mm,
infiltration index 2.5mm/hr and base flow of 50 cumecs.
Time (hrs) 03 06 09 12 15 18 21 24
Ordinates of
UH (cumecs)
0 112 360 515 385 320 255 230
Time (hrs) 27 30 33 36 39 42 45 48
Ordinates of
UH (cumecs)
175 130 90 65 40 25 15 0
07
OR
Q.4 (a) During a recuperation test, the water in an open well was depressed, by pumping
by 2.6 metres and it recuperated 1.9 metres in 90 minutes. Find i) yield from a
well of 5 m diameter under a depression head of 3 metres ii) the diameter of the
well to yield 10 litres/sec under a depression head of 3 metres.
07
(b) Define the following: 1) Aquifuge 2) specific capacity 3) Specific retention
4) porosity 5) Storage Coefficient 6) Drawdown 7) Vadose water
07
Q.5 (a) Explain channel routing and discuss its application and suitability. 07
(b) Discuss the various methods of flood estimation. Explain any one in detail. 07
OR
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (Old) EXAMINATION ? WINTER 2019
Subject Code: 150602 Date: 06/12/2019
Subject Name: Hydrology & Water Resources Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Describe a S-Hydrograph. Write the assumptions and its advantages. 07
(b) Explain working of Symons rain gauge with a neatly labelled sketch. 07
Q.2 (a) Discuss in short: 1) Water Harvesting techniques 2) Meteorological Drought 07
(b) For a storm of 3-hr duration, the rainfall rates are as follows:
Time Period
(minutes)
30 30 30 330 30 30
Rainfall Rate
(cm/hr)
1.5 3.5 4.5 3.2 2.0 1.0
If the surface runoff is 3.5cm, determine the ?-index and W-index.
07
OR
(b) Explain potential evapotranspiration and the methods to measure it. 07
Q.3 (a) Write a short note on Yield of a reservoir. Discuss the significance of useful life
of a reservoir.
07
(b) Write short notes on: i) Reservoir sedimentation ii) Spillways 07
OR
Q.3 (a) Discuss the factors affecting the selection of site for a dam. 07
(b) Discuss the classification of Hydro-Electric Power Plant with examples of each. 07
Q.4 (a) Explain the division of sub-surface water with a neatly labeled sketch. 07
(b) Find the ordinates of a storm hydrograph resulting from a 3 hrs storm with
rainfalls 0f 2.7, 6.45 and 3.55 cm during subsequent 3 hours intervals. The
ordinates of Unit Hydrograph are given below. Assume an initial loss of 5 mm,
infiltration index 2.5mm/hr and base flow of 50 cumecs.
Time (hrs) 03 06 09 12 15 18 21 24
Ordinates of
UH (cumecs)
0 112 360 515 385 320 255 230
Time (hrs) 27 30 33 36 39 42 45 48
Ordinates of
UH (cumecs)
175 130 90 65 40 25 15 0
07
OR
Q.4 (a) During a recuperation test, the water in an open well was depressed, by pumping
by 2.6 metres and it recuperated 1.9 metres in 90 minutes. Find i) yield from a
well of 5 m diameter under a depression head of 3 metres ii) the diameter of the
well to yield 10 litres/sec under a depression head of 3 metres.
07
(b) Define the following: 1) Aquifuge 2) specific capacity 3) Specific retention
4) porosity 5) Storage Coefficient 6) Drawdown 7) Vadose water
07
Q.5 (a) Explain channel routing and discuss its application and suitability. 07
(b) Discuss the various methods of flood estimation. Explain any one in detail. 07
OR
2
Q.5 (a) Discuss structural measures of flood control with suitable sketches. 07
(b) On the basin of isopluvial map, the 50 year 24 hr maximum rainfall at any place
is found to be 18 cm, Determine the probability of 24 hr rainfall of magnitude
equal to or greater than 18 cm occurring (a) at least once in 10 successive years,
(b) two times in 10 successive years and (c) once in 10 successive years.
07
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This post was last modified on 20 February 2020