Download GTU B.Tech 2020 Winter 5th Sem 3151311 Groundwater Hydrology And Contamination Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 5th Sem 3151311 Groundwater Hydrology And Contamination Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?V (NEW) EXAMINATION ? WINTER 2020
Subject Code:3151311 Date:22/01/2021
Subject Name:Groundwater Hydrology and Contamination
Time:10:30 AM TO 12:30 PM Total Marks:56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


MARKS
Q.1 (a) Define Groundwater hydrology.
03

(b) Differentiate between Confined and Unconfined aquifer.
04

(c) Explain Darcy's law. What are its limitations?
07



Q.2 (a) What do you mean by Groundwater contamination?
03

(b) Explain vertical distribution of Groundwater with sketch.
04

(c) Describe with neat sketch Groundwater in hydrological cycle.
07



Q.3 (a) What do you mean by Leaky aquifer?
03

(b) Differentiate between Porosity and Void ratio with its expression.
04

(c) Enlist the site selection criteria for Artificial recharge. Explain any one
07
artificial recharge method for Groundwater.




Q.4 (a) What is Cone of depression?
03

(b) The Void ratio of an unconsolidated clay sample is 1.81. Determine the
04
Porosity of the sample.

(c) In an area of 150 ha, the water table dropped by 5.8m. If the Porosity is 20%
07
and the Specific retention is 30% determine (i) the Specific yield of the
aquifer, (ii) change in Ground water storage.



Q.5 (a) What do you mean by Artesian well?
03

(b) Enlist Groundwater pollution remediation methods and explain any one in
04
detail.

(c) Derive the expression for steady radial groundwater flow in Unconfined
07
aquifer.



Q.6 (a) What do you mean by Ground water table?
03

(b) Differentiate between Groundwater and Surface water.
04

(c) Enlist sources of Groundwater pollution with its causes.
07



Q.7 (a) Define Hydraulic conductivity.
03

(b) Write down Indian standards for Groundwater quality.
04

(c) Explain Pumping test to estimate safe yield from an open well.
07



Q.8 (a) What do you mean by Perched aquifer?
03

(b) Differentiate between Aquitard, Aquifuge and Aquiclude.
04

(c) Derive the expression for steady radial groundwater flow in Confined
07
aquifer.
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