UNIT – IV
GEOLOGY OF DAMS AND RESERVOIRS : TYPES OF DAMS
AND BEARING OF GEOLOGY OF SITE IN THEIR SELECTION,
GEOLOGICAL CONSIDERATIONS IN THE SELECTION OF A
DAM SITE. ANALYSIS OF DAM FAILURES OF THE PAST.
FACTORS CONTRIBUTING TO THE SUCCESS
OF A RESERVOIR. GEOLOGICAL FACTORS INFLUENCING
WATER TIGHTNESS AND LIFE OF RESERVOIRS, GEO
HAZARDS, GROUND SUBSIDENCE. GEOPHYSICAL
STUDIES: IMPORTANCE OF GEOPHYSICAL STUDIES
PRINCIPLES OF GEOPHYSICAL STUDY BY GRAVITY
METHODS. MAGNETIC METHODS, ELECTRICAL METHODS.
SEISMIC METHODS, RADIO METRIC METHODS AND
GEOTHERMAL METHOD. SPECIAL IMPORTANCE OF
ELECTRICAL RESISTIVITY METHODS, AND SEISMIC
REFRACTION METHODS. IMPROVEMENT OF COMPETENCE
OF SITES BY GROUTING ETC. FUNDAMENTAL ASPECTS OF
ROCK MECHANICS AND ENVIRONMENTAL GEOLOGY