Groundwater Hydrology and Contamination Past Paper PDF 2022

Seat No.: ________ Enrolment No.___________ GUJARAT TECHNOLOGICAL UNIVERSITY BE - SEMESTER–V(NEW) EXAMINATION – SUMMER 2022 Subject Code:3151311 Date:02/06/2022 Subject Name:Groundwater Hydrolog...

Seat No.: ________ Enrolment No.___________ GUJARAT TECHNOLOGICAL UNIVERSITY BE - SEMESTER–V(NEW) EXAMINATION – SUMMER 2022 Subject Code:3151311 Date:02/06/2022 Subject Name:Groundwater Hydrology and Contamination Time:02:30 PM TO 05:00 PM Total Marks: 70 Instructions: 1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. Simple and non-programmable scientific calculators are allowed. Q.1 (a) Write the assumptions made in dupuit’s theory. 03 (b) Describe the hydrological water budget with the aid of example. 04 (c) An artesian tube well has a diameter of 20 cm. the thickness of an 07 aquifer is 30m and its permeability is 40 m/day. Find its yield under a drawdown of 5 m at the well face use radius of influence as recommended by sichardt. Q.2 (a) What do you mean by Ground water table? 03 (b) Differentiate between Groundwater and Surface water. 04 (c) Explain in detail ground water in hydrological cycle with neat sketch. 07 OR (c) What is ground water? Discuss formation of ground water with neat 07 sketch. Q.3 (a) Explain the Darcy’s law. What are its limitations? Discuss its validity. 03 (b) Explain the pumping test to estimate the safe yield from an open well. 04 (c) Derive the expression for steady radial groundwater flow in 07 Unconfined aquifer OR Q.3 (a) What do you mean by Perched aquifer? 03 (b) Explain the recuperation test to estimate the safe yield of an open well. 04 (c) Derive the expression for steady radial groundwater flow in Confined 07 aquifer. Q.4 (a) Enlist the site selection criteria for artificial recharge. 03 (b) Explain artificial recharge for “energy purpose”. 04 1  (c) What is artificial recharge? Explain different artificial recharge 07 methods of ground water. OR Q.4 (a) Explain induced recharge method with their flow pattern. 03 (b) Enlist and explain ground water remediation methods. 04 (c) Explain in detail different sources responsible for ground water 07 pollution with causes. Q.5 (a) What do you mean by Artesian well? 03 (b) Difference between fully and partial penetrating wells. 04 (c) Write down the Indian & International standards for ground water 07 quality OR Q.5 (a) Write down the ground water quality criteria for drinking water. 03 (b) Differentiate between Aquitard, Aquifuge and Aquiclude. 04 (c) A well penetrates fully a 10 m thick water bearing stratum of medium 07 sand having coefficient of permeability of 0.05 m/sec. the well radius is 10cm and is to be worked under a drawdown of 5 m at the well face. Calculate the discharge from the well. What will be the percentage increase in the discharge if the radius of the well is doubled? Take R= 300m in each case. *********** 2