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Seat No.:
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Subject Code: 2150602
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-V (NEW) EXAMINATION - WINTER 2020
Subject Name: Hydrology & Water Resources Engineering
Time: 10:30 AM TO 12:30 PM
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Instructions:
- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1
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- (a) Define: Hydrology, Flood routing, Penstocks (MARKS 03)
- (b) List out the various methods used to calculate the average depth of rainfall over a catchment and explain any one with neat sketch. (MARKS 04)
- (c) What is hydrograph? Draw a single peaked hydrograph and explain its components. What are the factors affecting the shape of the hydrograph. (MARKS 07)
Q.2
- (a) Describe the various types of dams based on the function served. (MARKS 03)
- (b) Define the term ‘Drought’. Briefly explain the types of drought. (MARKS 04)
- (c) The ordinates of 3 hrs Unit hydrograph are given below: (MARKS 07)
Time in Hrs. 0 3 6 9 12 15 18 21 24 27 30
Ordinates (cumecs) 0 1 10 25 20 16 12 9 7 5 3 0
Find the ordinates of a 6 hrs UH for the same basin analytically. Also, sketch 6 hr — Unit hydrograph. What is the peak value of discharge in 6 hr — Unit hydrograph?
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Q.3
- (a) Briefly explain the forms of precipitation. (MARKS 03)
- (b) The average rainfall over a basin of area 50 ha during a storm was as follows: (MARKS 04)
Time (hr) 0 1 2 3 4 5 6 7
Rainfall (mm) 0 6 11 34 28 12 6 0--- Content provided by FirstRanker.com ---
If the volume of runoff from this storm was measured as 25000 m³, determine F —index for the storm. - (c) Explain with neat sketch storage zones of reservoir. (MARKS 07)
Q.4
- (a) Define: Unit Hydrograph, Darcy’s law, Flood (MARKS 03)
- (b) What is a spillway? List out the types of spillway and explain any one briefly. (MARKS 04)
- (c) Describe the process of the Hydrological cycle with a neat sketch. (MARKS 07)
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Q.5
- (a) Explain causes of flood. (MARKS 03)
- (b) Write a short note: Methods for Separation of Base flow. (MARKS 04)
- (c) Draw a neat sketch of ‘Hydroelectric power plant’. Explain each component briefly. (MARKS 07)
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Date: 01/02/2021
Total Marks: 56
Q.6
- (a) Define: Time of concentration, storm water, Runoff. (MARKS 03)
- (b) Explain the pumping test to estimate the safe yield from an open well. (MARKS 04)
- (c) List of the structural and non — structural approaches of controlling damage due to floods. Explain structural flood control measures. (MARKS 07)
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Q.7
- (a) Define: Evapo-transpiration, Precipitation, Infiltration (MARKS 03)
- (b) Write down the different methods available for Flood estimation and explain any two methods. (MARKS 04)
- (c) Explain Roof top rain water harvesting with neat sketch. (MARKS 07)
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Q.8
- (a) Enlist the different types of aquifers. Describe any one aquifer with neat sketch. (MARKS 03)
- (b) What is the difference between hyetograph and hydrograph? (MARKS 04)
- (c) Define the term ‘Evaporation’. Explain the factors affecting evaporation. (MARKS 07)
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