Coastal Ocean Contamination Assessment System

🎛️ Contamination Parameters

🧪 Contaminant Type

Type of pollutant affecting degradation and transport

💧 Discharge Rate

100 kg/day

Continuous pollutant input rate

⏱️ Discharge Duration

24 hours

How long contamination continues

📍 Distance from Shore

1 km

Offshore distance of pollution source

🌊 Current Speed

0.15 m/s

Alongshore current velocity

💨 Wind Speed

8 m/s

Surface wind affecting mixing

🌊 Wave Height

1.5 m

Significant wave height

📏 Water Depth

30 m

Average coastal water depth

🌡️ Water Temperature

18 °C

Sea surface temperature

🧂 Salinity

35 PSU

Water salinity (practical salinity units)

🦠 Phytoplankton Density

2.5 mg/m³

Chlorophyll-a concentration

🦠 Bacterial Activity

25 × 10⁶ cells/L

Bacterial degradation potential

🐟 Fish Population

5 kg/ha

Fish biomass density

🦪 Filter Feeders

3 kg/m²

Bivalve/filter feeder biomass

⚗️ pH Level

8.1

Seawater pH affecting chemical reactions

💨 Dissolved Oxygen

8 mg/L

DO levels affecting degradation

🌫️ Turbidity

5 NTU

Water clarity affecting photodegradation

🪨 Suspended Sediments

50 mg/L

Particulate matter for adsorption

☀️ UV Radiation

5 W/m²

UV intensity for photodegradation

📊 Contamination Assessment Results

Multi-parameter pollution impact analysis

🌊 Concentration Over Time

📍 Spatial Distribution

⚗️ Degradation Processes

🐟 Bioaccumulation Risk

🎯 Contamination Plume Evolution

🧬 Oceanographic Effects on Contamination

🌊 Physical Transport

Currents, waves, and tides control pollutant advection and dispersion. Strong currents increase dilution but extend contamination range. Wave action enhances vertical mixing and shoreline deposition.

🌡️ Temperature Effects

Higher temperatures accelerate chemical degradation and biological processes. Cold water slows breakdown but increases pollutant persistence. Temperature gradients affect vertical mixing patterns.

🧂 Salinity Impacts

Salt concentration affects pollutant solubility and chemical speciation. Freshwater inputs create density gradients that trap contaminants. Salinity changes alter bioavailability.

💨 Oxygen Levels

Dissolved oxygen controls aerobic degradation rates. Low oxygen creates anoxic conditions favoring different breakdown pathways. Hypoxia increases pollutant toxicity to marine life.

⚗️ pH Chemistry

Acidity affects metal speciation and bioavailability. pH changes alter chemical reaction rates and pollutant mobility. Ocean acidification modifies contamination impacts.

🦠 Biological Processes

Microorganisms degrade organic pollutants through biodegradation. Phytoplankton uptake affects nutrient pollution. Filter feeders concentrate contaminants in tissues.

🪨 Sediment Interactions

Suspended particles adsorb hydrophobic contaminants. Sediment resuspension releases buried pollutants. Particle settling removes contaminants from water column.

☀️ Light Penetration

UV radiation breaks down photosensitive pollutants. Turbidity reduces light penetration and photodegradation. Seasonal light cycles affect degradation rates.

📐 Contamination Transport & Fate Equations

Advection-Dispersion-Reaction Equation

∂C/∂t + u·∇C = ∇·(K∇C) - λC - S
Where C = concentration, u = velocity, K = dispersion, λ = decay, S = sinks

Horizontal Dispersion Coefficient

Kₓ = 0.1 × U × L
Kᵧ = 0.01 × U × L
Where U = current speed, L = length scale

Vertical Mixing (Wind-Driven)

Kᵥ = 0.4 × u* × h
u* = √(τ/ρ) = 0.032 × W₁₀
Where u* = friction velocity, W₁₀ = wind speed at 10m

First-Order Decay Rate

λ = λ₀ × f(T) × f(pH) × f(O₂) × f(UV)
f(T) = exp(0.069 × (T - 20))
Temperature-dependent degradation with environmental modifiers

Bioaccumulation Factor

BAF = BCF × BMF^(TL-1)
BCF = 0.048 × Kₒw^0.76
Where BCF = bioconcentration, BMF = biomagnification, TL = trophic level

Sediment Partition Coefficient

Kd = fₒc × Kₒc
Kₒc = 0.41 × Kₒw
Where fₒc = organic carbon fraction, Kₒw = octanol-water coefficient

Photodegradation Rate

λₚₕₒₜₒ = Φ × I × ε × (1 - exp(-α × z))
Where Φ = quantum yield, I = light intensity, ε = extinction, z = depth

🔢 Calculated Impact Parameters

🎯 Peak Concentration

mg/L

📏 Plume Length

📐 Plume Width

⏱️ Half-Life

days

🌊 Dispersion Rate

m²/s

🐟 Bioaccumulation

factor

🪨 Sediment Binding

L/kg

☀️ Photo-Degradation

day⁻¹

🦠 Bio-Degradation