LEC 3 EVS

Environmental Pollution

  • Definition: Contamination of physical, chemical, and biological components of the Earth systems (air, water, soil).

  • Impact: Adversely affects environmental processes, life forms, and property.

  • Significance: Considered the greatest problem facing humanity today.

  • Causes: Urbanization, industrialization, mining, and exploration.

  • Ongoing Issue: Despite global awareness, the effects of pollution persist due to its long-term consequences.

Types of Environmental Pollution

  • Air Pollution

  • Water Pollution

  • Soil Pollution

  • Noise Pollution

  • Thermal Pollution

  • Nuclear Hazards

Environmental Monitoring & Its Objectives

  • Purpose: To understand levels of harmful pollutants and their effects on the environment, human life, and wildlife.

  • Benefits: Helps in trend analysis for future complications and early identification of natural calamities for precautionary measures.

Types of Environmental Monitoring

  • Methods Include:

    • Air Quality Monitoring

    • Water Sampling and Analysis

    • Noise Level Testing

    • Soil Quality Testing

    • Microbial Monitoring

  • Classifications:

    • Planned Emission

    • Fugitive Emission

    • Accidental Emissions

Source Emission Monitoring

  • Purpose: To measure emission rates and their environmental effects.

  • Variation: Monitoring methods depend on the source of emission.

Stationary Source or Stack Monitoring

  • Key Points:

    • Samples must accurately represent pollutant emissions.

    • Sampling frequency and duration must be consistent for comprehensive reports.

    • Suggested number of sampling points: 8-12 for accuracy.

Waste Water Monitoring Methods

  • Similar to stack monitoring; requires representative sampling from different sections.

  • Methods:

    • Vertical pipes reduce solid deposition issues compared to horizontal.

    • Grab sampling and auto samplers used for variations in effluents.

Solid Waste Monitoring

  • Characteristics: Solid waste is more inhomogeneous than gases and liquids.

  • Method: Composite sampling method for representative sampling.

Environmental Monitoring Techniques

  • Techniques Include:

    • Filtration

    • Composite Sampling

    • Sedimentation Sampling

    • Grab Sampling

    • Electrostatic Sampling

    • Adsorption

    • Condensation

Environmental Monitoring Tools

  • Importance of equipment and tools in monitoring processes:

    • Sampling Tools: Automated samplers, high volume samplers.

    • Monitoring Tools: Air monitoring sensors, data loggers, noise level meters.

    • Laboratory Tools: Temperature chambers, analyzers, balances, pH meters.

Environmental Indicators

  1. Human Population

  2. Ecological Footprint

  3. Food Production

  4. Carbon Dioxide Levels

  5. Average Global Surface Temperature

  6. Sea Level Change

  7. Annual Precipitation

  8. Species Diversity

  9. Water Quality (Toxic Substances and Pollution)

  10. Habitat Loss

  11. Infant Mortality Rate

  12. Life Expectancy