Environmental Science And Engineering Simulations
A collection of interactive 3D visualizations and simulations to help you master concepts in environmental science and engineering.
Introduction to Environmental Science - Theory & Concepts - Population Growth
Fundamental concepts of ecology, ecosystems, energy flow, and population dynamics in environmental engineering.
Exponential Growth (J-curve): Unlimited growth ($dN/dt = rN$).
Logistic Growth (S-curve): Growth slows as it approaches Carrying Capacity $K$ ($dN/dt = rN(1 - N/K)$).
Water Pollution and Quality Modeling - Theory & Concepts - Oxygen Sag Curve
Understanding sources of water pollution, physical and chemical parameters, Biochemical Oxygen Demand (BOD), and the Streeter-Phelps equation for modeling dissolved oxygen in streams.
Blue Line: Dissolved Oxygen (DO) concentration.
Sag Point: The lowest DO level, occurring when Deoxygenation Rate = Reaeration Rate.
Critical Deficit ($D_c$): Maximum difference between Saturation DO and Actual DO.
Water and Wastewater Treatment - Processes & Design - Water Treatment Plant
Core physical, chemical, and biological unit operations used to purify drinking water and treat municipal wastewater.
Treatment Insufficient
Final Turbidity: 30.0 NTU (Target ≤ 5)
Estimated Pathogens: None
Water and Wastewater Treatment - Processes & Design - Sedimentation
Core physical, chemical, and biological unit operations used to purify drinking water and treat municipal wastewater.
Adjust the settling velocity to see how quickly particles fall to the bottom. Larger particles generally fall faster due to gravity overcoming drag forces.
Air Pollution and Control - Theory & Concepts - Air Dispersion
Criteria pollutants, atmospheric stability, dispersion models, and air quality standards.
This model calculates ground-level concentration () directly downwind ().
Notice how increasing Stack Height () shifts the maximum concentration point further downwind and lowers its peak value.
Solid Waste Management - Theory & Concepts - Landfill Lifespan
Principles of waste management, the waste hierarchy, sanitary landfill design, and hazardous waste.
Estimated Lifespan
25.8 years
This chart shows how quickly landfill volume is consumed. The curve steepens due to population growth or increased consumption.
Environmental Impact Assessment - Theory & Concepts - E I A Simulation
The process of evaluating the likely environmental impacts of a proposed project or development, considering inter-related socio-economic, cultural, and human-health impacts.
The EIA Process Flow
Click through the steps to explore the Environmental Impact Assessment process.
1. Screening
Determine if an EIA is required.
Key Actions:
- •Review project type and size.
- •Check against regulatory thresholds.
- •Decide on level of assessment needed.
Noise Pollution and Control - Theory & Concepts
Fundamentals of acoustics, sound pressure levels, and decibel addition for environmental engineering.
Decibel Addition Simulator
Sound Pressure Levels (SPL) are logarithmic. You cannot simply add decibels together (e.g., 70 dB + 70 dB ≠ 140 dB). Instead, you must convert them to intensity ratios, add them, and convert back.
Global Environmental Issues - Theory & Concepts - Greenhouse Effect
Understanding macro-scale challenges: Climate Change, Ozone Depletion, Acid Rain, and the Greenhouse Effect.
Human Activity Level
Simulation Results
Sustainability and Green Engineering - Theory & Concepts - Life Cycle Assessment
Principles of sustainable design, Life Cycle Assessment (LCA), and green building practices in civil engineering.
Comparative Life Cycle Assessment (LCA)
Compare the cradle-to-grave carbon footprint of different construction materials.
Global Warming Potential (kg CO₂e)
Comparison Results
8,000 kg CO₂e
Values extending to the left of the zero line represent carbon sequestration (e.g., timber absorbing CO₂ during growth) or credits from end-of-life recycling.