Land-Source Intelligence DashboardGreater Bay Area · the land → estuary → ocean input pipeline
Plastic type
Source
land inputs · —
▲N
113.72°E · 22.35°N
20 km
LAND-INPUT LAYERS
Primary emitters
WWTP & outfalls
Industrial & ports
Regulatory hotspots
Monitoring stations
Fisheries zones
Tourism sites
Dispersion (context)
LEGEND
Primary emitter
WWTP / outfall
Industrial / port
Monitoring station
Fishing ground
Tourism site
Regional Plastic Input Trendsmacro vs micro · t·mo⁻¹
Environmental Risk Assessment0–100 index
Source Compositionby sector
Material Flow Analysisland → estuary → ocean · t·mo⁻¹
Regional Digital-Twin Map
Pearl River Estuary · 2-D advection–diffusion fate model · pan · zoom · click a source · mass balance closes <1%
— · tide flood
▲N
113.72°E · 22.35°N
20 km
LEGEND
Plastic concentration
Regulatory redline
Fisheries zone
Land-based source
Priority hotspot
Filterssubset the model
Polymer
Source
Layers
Plastic concentration
Currents & drift
Land-based sources
Regulatory redline
Fisheries zones
Microplastic field
Model Parameters
Eddy diffusivity K10 m²·s⁻¹
Windage α3.0 %
Macro settling ks0.026 h⁻¹
Coastal retention β7.0 %/step
TM2=12.42 h · fragmentation kf=0.03 h⁻¹ · resuspension τcrit shear-gated
Governance Prioritywhere to act first
Mass Balancemonthly
Life-Cycle Carbon Reconstruction
Coupled DMFA-Release → GHG · the same material flows that leak plastic drive the carbon inventory
Monthly GHG by Life-Cycle Stagekt CO₂e · recycling = credit
Plastic–Carbon Trade-offby scenario
Carbon by Polymer13 polymers · stacked by stage
Carbon Intensitykg CO₂e · t⁻¹ managed
Method & Validation
What the model actually solves — and how we check it
Validation at a glance
Model parameters
Data & provenance
Release inventory: dynamic MFA (Liu & Nowack, Resour. Conserv. Recycl. 2022/2024) · 13 polymers · 35 product categories · 183 release pathways. Carbon factors anchored to ecoinvent + combustion stoichiometry. Estuarine circulation idealised for the Pearl River / Shenzhen Bay funnel (M2 tide, monsoon windage). Reference frameworks: Copernicus Marine, OECD Global Plastics Outlook, UNEP 2025.
Roadshow prototype — idealised geometry & illustrative inventory for demonstration; not an operational forecast.