WITH EFFECT FROM THE ACADEMIC YEAR 2013- 2014

 

CE 458

 

GROUND WATER HYDROLOGY

 

(Elective-III)

 

 

Instruction                                                                                                                                                                                       4 Periods per week

 

Duration of University Examination                                                                                                                                                     3 Hours

 

University Examination                                                                                                                                                                       75 Marks

 

Sessional                                                                                                                                                                                          25  Marks

 

UNIT-I

 

Introduction: Ground water in the hydrologic cycle, vertical distribution of ground Water. Types of aquifers - unconfined, confined and leaky aquifers, porosity, void ratio, storage coefficient, permeability, Transmissivity, specific yield, safe yield. General equation of ground water flow, steady undirectional flow, steady radial flow to a well in unconfined and confined aquifiers. Steady flow with uniform recharge.

 

UNIT-II

 

Unsteady Radial Flow to a Well: Non equilibrium equation for pumping tests, Theis method of solution, Cooper Jacob method, Chow’s methods of solution, law of times, well flow near acquifer boundaries. Image wells, multiple well systems, partially penetrating wells, steady radial flow in leaky artersion aquifer. Well completion and well development.

 

UNIT-III

 

Geophysical Exploration: Surface investigations of ground water -Electrical Resistivity method, seismic refraction method, gravity and magnetic methods, geologic methods, Dowsing. Subsurface Investigations - Test drilling, resistivity logging, potential logging, Temperature logging, calliper logging, Interpretation oflogs and selection of site as a well.

 

UNIT-IV

 

Artificial Recharge of Ground Water: Methods ofrecharge, water spreading, sewage discharge, Recharge through pits and shafts, Recharge through well, Induced recharge. Sea water intrusion in coastal aquifers; occurrence, Ghyben - Herzberg relation, shape of fresh - salt water interface, length ofthe intreded sea water wedge, oceanic island aquifers, upcoming, prevention and control of sea water intrusion.

UNIT-V

 

Ground Water Basin Management:Conjunctive use of surface and ground waters, Hydrologic balance equation. Ground water analog models-Sand models, electric analog models, viscous flow models, numerical analysis models - Finite difference method.

 

Suggested Reading:

 

1. 1.D.K. Todd, Ground Water Hydrology, John Wiley & Sons, Inc.,USA.

 

1. 2.H.M. Ragunath, Ground Water, Wiley Eastern Limited, New Delhi.

 

1. 3.K.P. Karnath, Ground Water Ananment, Development and Management, Tata McGraw Hill Publishing Company, New Delhi.

 

1. 4.Walton, Ground Evaluation and Management, McGraw Hill.

 

1. 5.Bouwer, Ground Water Hydrology, McGraw Hill.