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
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
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
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
Air Pollution and Control - Theory & Concepts
Criteria pollutants, atmospheric stability, dispersion models, and air quality standards.
This model calculates ground-level concentration ($z=0$) directly downwind ($y=0$).
Notice how increasing Stack Height ($H$) shifts the maximum concentration point further downwind and lowers its peak value.
Solid Waste Management - Theory & Concepts
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.
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
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
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.