ABOUT THE COURSE:Assessment of the subsurface conditions is of great importance in civil engineering. Geophysical tools offer a cheaper, non-invasive, and rapid method of understanding and characterising subsurface conditions.Geophysical methods are used extensively for geotechnical engineering, groundwater exploration, recharge assessment, seawater intrusion, global water balance and clime change, sustainable groundwater management, environmental impact assessment, monitoring groundwater remediation strategies, mineral exploration, etc.Geophysical tools offer a cheaper, non-invasive, and more rapid method of understanding and characterising surface and subsurface conditions. In this course, the various physical properties of the earth and the application of different geophysical methods to understand subsurface features and structures will be taught using suitable case studies.INTENDED AUDIENCE: Civil Engineering / Ocean Engineering / Mining Engineering / Water Resources Engineering / Environmental Engineering / Geotechnical Engineering / Geology / Applied GeologyPREREQUISITES: 12th Std Maths and PhysicsINDUSTRY SUPPORT: Construction/Geotechnical Companies, Environmental Consultancy Companies, ONGC, AMD, Groundwater Exploration Consultants, Leading companies such as L&T, Gammon India, HCC….
Overview
Syllabus
Week 1:Introduction to geophysical methods: Scope and application of different methods; Planning, implementation and interpretation of geophysical investigations;Week 2:Applications in geotechnical, environmental and groundwater investigations; Parameters measured and their relation to the property of the medium;Week 3:Electrical methods: resistivity methods, principle, vertical electrical sounding, profiling, Self-potential methods, Induced polarisation methods;Week 4:Electromagnetic methods; Ground-based and air-based methods; case studies; Week 5:3 D sounding, inverse methods, earthen embankment seepage, case studies and applications; Week 6:Seismic methods: Principle, travel velocity in various geological formations;Seismic field operation on land, refraction and reflection survey, seismic inversion;Week 7:Determination of thickness, attitude and depth of formations, cross-hole seismic methods, assessment of ground improvement; case studies Week 8:Gravity methods: Gravimeters, corrections, interpretation of gravity data;Week 9:Gravity recovery and climate change experiment, applications;Week 10:Magnetic methods: Components of magnetic field; Magnetometers;corrections, qualitative interpretation; applicationsWeek 11:Ground penetrating radar methods; Synthetic aperture radar imaging for land deformation studies; Other emerging methods: Surface nuclear magnetic resonance methods;Week 12:Radioactivity methods and Well logging; Electrical and radioactivity logging methods, calliper and other miscellaneous logging methods; field procedure and interpretation of data;
Taught by
Prof. Elango Lakshmanan
