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IIT Bombay Slide 16 Scope of Environmental Geomechanics Scope of Environmental Geomechanics Assessment of pollutants being discharged on/in the soil deposits (Disposal/Handling/storage) (Disposal/Handling/storage) Process by which the

  1. IIT Bombay Slide 16 Scope of Environmental Geomechanics Scope of Environmental Geomechanics Assessment of pollutants being discharged on/in the soil deposits (Disposal/Handling/storage) (Disposal/Handling/storage) Process by which the pollutants travel in geo- environment (Contaminant Transport) (Contaminant Transport) Protection of ground water aquifers from contamination (Containment) (Containment) Methods of cleaning the contaminated sites (Remediation) (Remediation) Methods of creating “Value added” products (Recovery, Recycling & Reuse…..Three Rs) (Recovery, Recycling & Reuse…..Three Rs) Environmental Geomechanics Lecture No. 3 D N Singh

  2. IIT Bombay Spread of Contaminant(s) Slide 17 Precipitation (Waste-Environment Interaction) Containment /Barrier (Sheet pile/grout) Landfill G.L. Soil Stationary W.T. Leachate Contaminant plume Hard rock (Impervious,Aquitard) Environmental Geomechanics Lecture No. 3 D N Singh

  3. IIT Bombay Slide 18 Spread of Contaminant (another scenario) Precipitation Calls for: Modeling (to predict transport & fate of contaminants in geoenvironment) Validation Landfill G.L. Soil Extent (time & space) Moving W.T. Intensity Concentration plume Hard rock (Impervious,Aquitard) Environmental Geomechanics Lecture No. 3 D N Singh

  4. IIT Bombay Slide 19 Importance of the following • Theory (model making) • Lab tests (data generation) • Field tests (data generation/verification) • Empirical relations (validation of the developed theory) • Computer Applications (Role of Information Technology) • Experience, Judgement and FOS (Application of the acquired knowledge) Environmental Geomechanics Lecture No. 3 D N Singh

  5. IIT Bombay Slide 1 14.8.2013 Lecture No. 4 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. 4 D N Singh

  6. 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. 4 D N Singh

  7. 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. 4 D N Singh

  8. 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. 4 D N Singh

  9. 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. 4 D N Singh

  10. IIT Bombay Slide 6 Soil Response to Environments  Soil structures (on/in/with)  Pore fluid characteristics  Soil-heat  Soil-Chemical  Soil Bacteria  Soil-Root  Soil-Electrical  Soil-Liquid (water) Environmental Geomechanics Lecture No. 4 D N Singh

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