GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-V (OLD) EXAMINATION - WINTER 2018
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Subject Code:150602 Date: 07/12/2018
Subject Name: Hydrology & Water Resources Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) What is unit hydrograph? How it is constructed? Write assumptions and limitations of the unit hydrograph. [07]
(b) Enumerate various types of rain gauges and explain weighing bucket type rain gauge in detail. [07]
Q.2 (a) Explain the principal factors affecting the run-off in brief. [07]
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(b) How would you estimate the design flood for a flood control project? Explain in briefly. [07]OR
(b) What are the various causes of floods? [07]
Q.3 (a) Describe the methods of calculating average depth of rainfall from catchments. [07]
(b) Describe the various types of hydel plants. [07]
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OR
Q.3 (a) Explain ¢- index and W-index with the procedure to determine the same. [07]
(b) Explain with neat sketch storage zones of a reservoir. [07]
Q.4 (a) What are the different types of aquifers? Explain each in brief. [07]
(b) Discuss various types of drought. Explain the causes of drought. [07]
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OR
Q.4 (a) Define flood routing and explain graphical method of flood routing. [07]
(b) Derive an expression for discharge from a well which is fully penetrated in confined aquifer. [07]
Q.5 (a) The ordinates of 4 hour unithydrograph are given in the table. Compute the ordinate of 8 hour unit hydrograph. [07]
| Time in hour | 4 | 8 | 12 | 16 | 20 | 24 | 28 | 32 | 36 | 40 | 44 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Unit hydrograph in cumec | 0 | 20 | 50 | 150 | 120 | 90 | 70 | 50 | 30 | 20 | 10 | 0 |
(b) Define water resources project. Explain environmental aspects in water resources planning. [07]
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OR
Q.5 (a) Discuss factors consider while selecting suitable site for a reservoir. [07]
(b) Water was pumped out from a well in a confined aquifer 10m thick, having a hydraulic conductivity of 1.5m/day. The drawdown observed in the two adjoining wells at 10m and 50m from the pumping well was 3.2m and 0.08m, respectively. Find the constant rate of pumping. [07]
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