GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Subject Name: Ground Water Contamination
Time: 02:30 PM TO 05:00 PM Total Marks: 70
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VI (New) EXAMINATION - WINTER 2019
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Subject Code: 2161307 Date: 12/12/2019Subject Name: Ground Water Contamination
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Marks | |
|---|---|
| Q.1 (a) Define the following terms. (1) Aquiclude (2) Aquifuge (3) Perched aquifer | 03 |
| (b) Explain in detail how to monitor groundwater quality. | 04 |
| (c) What is ground water? Discuss vertical distribution of ground water with neat Sketch. | 07 |
| Q.2 (a) Write down the hydrological properties of water bearing strata. | 03 |
| (b) Explain in detail different sources responsible for ground water pollution with causes. | 04 |
| (c) Explain the recuperation test to estimate the safe yield of an open well. | 07 |
| OR | |
| (c) Explain in detail steady & unsteady flow solution for fully penetration wells. | 07 |
| Q.3 (a) Write the assumptions made in dupuit’s theory. | 03 |
| (b) Explain the different methods of waste water recharge for reuse. | 04 |
(c) Design a tube well for the following data.
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| OR | |
| Q.3 (a) Explain induced recharge method with their flow pattern. | 03 |
| (b) A pumping test was conducted for an open well of diameter 3.6m. the water was pumped out at a constant rate of 300lit/min. find specific yield. Take h=3.5 m | 04 |
| (c) Water is pumped out at the rate of 2500 lit/min from a well of 0.3 m diameter, penetrating fully in an aquifer of 30 m thickness. The draw downs observed in two adjoining wells at 20 m and 120 m from the pumping well are 8 m and 0.6 m respectively. Determine the average hydraulic conductivity. | 07 |
| Q.4 (a) What is cone of depression? | 03 |
| (b) Define following terms: (1) Porosity (2) Permeability (3) Transmissibility (4) Specific yield | 04 |
| (c) Derive the differential equation for Unconfined aquifer. | 07 |
| OR | |
| Q.4 (a) Write a short note on advective and dispersive transport mechanism | 03 |
| (c) What is artificial recharge? Explain different artificial recharge methods of ground water. | 07 |
| Q.5 (a) Give the difference between fully and partial penetrating wells. | 03 |
| (b) Explain site selection criteria for artificial recharge. | 04 |
| (c) Write down the Indian & international standards for ground water quality. | 07 |
| OR | |
| Q.5 (a) Explain Artificial recharge for “energy purpose”. | 03 |
| (b) Explain the Darcy’s law. What are its limitations? Discuss its validity. | 04 |
| (c) Explain in detail interference among wells. | 07 |
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