Sub-topics Soil-water-Environment Interaction The Natural - PowerPoint PPT Presentation

IIT Bombay Slide 1 03.8.2017 Lecture No. 5 Lecture Name: Soil-Water-Environment Interaction Sub-topics • Soil-water-Environment Interaction • The Natural Environment • The Man-made Environment • Response of the soil to the Environment • Basic Concepts: Analysis of Gemoechanical Engg. Problems • Flaws in Classical Geomechanics Environmental Geomechanics Lecture No. 5 D N Singh

IIT Bombay Slide 2 Soil-Water-Environment Interaction The Natural Man Made Geomicrobiosphere Environment Environment The Particle Energy Environmental Field Theory Geotechnical Problems Requires knowledge from other Disciplines Understanding of (Bacteriology/Biology, Chemical Soil response to Engg./Climatology/ Geohydrology/Geophysics/Geochemistry/ Environments Hydrogeology/Mechanics/Microgeology/Physico (Short & long-term) -Chemistry/SoilScience/Soil Engineering/Toxicology) Environmental Geomechanics Lecture No. 5 D N Singh

IIT Bombay Slide 3 The Natural Environment  Atmos phere ( variable amount of vapour/dust )  Bios phere ( all plants & animal life ) Oxygen Cycle Nitrogen Cycle The Cycle of Nature Carbon Cycle  Hydro sphere (Water in oceans, rivers, lakes, aquifers, ice, clouds)  Litho sphere (stone, rocks and soils)  Geomicrobiosphere Ecosphere ( to study the characteristics of tree, vegetation, roots and bacterial activities in the soil and water and its overall response) Environmental Geomechanics Lecture No. 5 D N Singh

IIT Bombay Slide 4 The Cycle of Nature Oxygen Cycle (O 2 is found in combination with Si & Al) Alumino silicates, Metallic oxides, Carbonates, Sulfates, Nitrates, Phosphates) Nitrogen Cycle (Transfer of Nitrogen between atmosphere, biosphere, lithosphere & hydrosphere in various forms) Nitrogen fixation, Carbon Cycle (oxidation of carbon containing material) CO 2 formation required for photosynthesis Environmental Geomechanics Lecture No. 5 D N Singh

IIT Bombay Slide 5 Man-made Environment Solid Liquid  Agricultural wastes  Human and Animal wastes  Industrial wastes  Mine wastes…… Acid mine waste (due to oxidation of Iron Sulphide (FeS 2 ) or Pyrites to H 2 SO 4 )  Nuclear wastes  Construction Effects (Blasting/Dewatering/debris…) Environmental Geomechanics Lecture No. 5 D N Singh