Water Resources Engineering Simulations

A collection of interactive 3D visualizations and simulations to help you master concepts in water resources engineering.

Water Resources Planning and Management - Theory & Concepts - Benefit Cost

Comprehensive guide to Water Resources Planning including Project Formulation, Economic Analysis, Environmental Impact Assessment, Water Law, and System Optimization.

Water Treatment - Theory & Concepts - Water Treatment Process

Comprehensive overview of Drinking Water Treatment processes including Coagulation Chemistry, Sedimentation Types, Filtration, and Disinfection By-Products.

Coagulation/Flocculation Simulator

Adjust the raw water turbidity and the Alum coagulant dose to see the effect on floc formation and final settled water turbidity.

Raw Water Turbidity (NTU): 100

Alum Dose (mg/L): 0

Process Results

Floc Formation: None
Estimated Settled Turbidity: 100 NTU

❌ Turbidity too high. Increase coagulant dose.

Water Treatment - Theory & Concepts - Water Treatment Train

Comprehensive overview of Drinking Water Treatment processes including Coagulation Chemistry, Sedimentation Types, Filtration, and Disinfection By-Products.

Conventional Water Treatment Train

Click on each stage to explore the physical and chemical processes used to purify surface water into safe drinking water.

Coagulation

Chemicals (coagulants like Alum) are rapidly mixed into raw water. They neutralize the negative electrical charges on fine particles, which normally keep them apart.

What happens to the particles?

Rapid mixing. Chemicals added. Charges neutralized.

Wastewater Engineering - Theory & Concepts - B O D Kinetics

Detailed coverage of Wastewater Engineering including Activated Sludge, Attached Growth Processes, Nutrient Removal, and Sludge Management.

BOD Exertion Kinetics

Visualize how Biochemical Oxygen Demand (BOD) is consumed over time. Adjust the Ultimate BOD ($L_0$), the reaction rate constant ($k$), and the water temperature to see how they affect the standard 5-day BOD ($BOD_5$).

Ultimate BOD (L₀)300 mg/L

Rate Constant (k₂₀)0.20 day⁻¹

Temperature (°C)20°C

Standard 5-Day BOD (BOD₅)

190

mg/L

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Stormwater Management - Theory & Concepts - Runoff Hydrograph

Detailed coverage of Stormwater Management including Urban Runoff, SCS Curve Number, Detention Basins, Low Impact Development (LID), and Culvert Design.

Urbanization Impact on Stormwater Hydrographs

Adjust the percentage of impervious area (pavement, roofs) to see how urbanization alters the natural hydrologic cycle. Notice how increased imperviousness causes a "flashier" response: a higher peak flow that arrives much sooner, increasing flood risk.

Impervious Area (%)10%

Rural (10%)Urban (90%)

Rainfall Intensity (mm/hr)25

Watershed Area (ha)50

Peak Flow (Qp)

69.4 m³/s69.4 m³/s

Time to Peak (Tp)

3.0 hrs3.0 hrs

Runoff Volume Increase

+0%

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Stormwater Management - Theory & Concepts - Hydrograph Routing

Detailed coverage of Stormwater Management including Urban Runoff, SCS Curve Number, Detention Basins, Low Impact Development (LID), and Culvert Design.

Dams and Reservoirs - Theory & Concepts - Dam Stability

Comprehensive coverage of Dams and Reservoirs, including types, stability analysis, seepage through earth dams, and reservoir routing.

Gravity Dam Stability Analysis

Adjust the dimensions of the rectangular gravity dam and the water depth to see how the forces (Weight, Hydrostatic Pressure, and Uplift) affect the Factors of Safety against overturning and sliding.

Dam Height (H)15 m

Dam Base Width (B)8 m

Water Depth (h)13 m

Concrete Density (

\\gamma_c

)24 kN/m³

Include Foundation Uplift Pressure

P=829 kN

W=2880 kN

F.S. Overturning

SAFE (≥1.5)

3.21

$M_{res}$ : 11520 | $M_{ovt}$ : 3592

F.S. Sliding

SAFE (≥1.5)

2.26

Assumes $\\mu = 0.65$

Irrigation Engineering - Theory & Concepts - Soil Moisture

Detailed coverage of Irrigation Engineering including soil-water relationships, crop water requirements, salinity control, and irrigation efficiency.

Soil-Water-Plant Relationship Simulator

Adjust the soil properties (Field Capacity, Wilting Point), the crop root depth, and your Management Allowed Depletion (MAD) to calculate the Net Irrigation Requirement (the amount of water to apply per irrigation event).

Field Capacity (FC)25% (vol)

Maximum water held against gravity.

Permanent Wilting Point (PWP)12% (vol)

Water unavailable to plants.

Root Zone Depth100 cm

Mgmt. Allowed Depletion (MAD)50% of AWC

How dry the soil gets before we irrigate.

UNAVAILABLE

Field Capacity (FC) = 25%

Irrigation Trigger = 18.5%

Permanent Wilting Point = 12%

AWC (13.0%)

Total Avail. Water (AWC)

130

Net Irrigation Req. (d_net)

Irrigation Engineering - Theory & Concepts - Irrigation Scheduling

Detailed coverage of Irrigation Engineering including soil-water relationships, crop water requirements, salinity control, and irrigation efficiency.