UNIVERSITY OF CRETE SCIENCE SCHOOL BIOLOGY DEPARTMENT

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UNIVERSITY OF CRETESCIENCE SCHOOLBIOLOGY
DEPARTMENT

• CIRCULATION and TRANSPORT
• MODELS
• in the coastal area of
• AGIA PELAGIA - MILATOS

Evangelos Pafilis
IMBC - MDNS
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Numerical Models

• Predictive scientific tools using observations
  data
• Ruled by parameters, expressed through
  mathematical equations
• Computers provide a vast size of calculations and
  great accuracy

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2-D Wind Coastal Circulation Model

• Coastal Zone, the zone among coastline and
  continental slope
• Coastal Circulation, the development of
  non-steady velocity and surface elevation fields
• Velocity vector and elevation for each point

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2-D Advective Transport Pollutant Model

• Input the results of the circulation model
• Advection and diffusion phenomena are described
• Output the concentration of the pollutant at
  each point after a certain period of time

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Used in the past by IMBC - MDNS

• Heraklion new Airport project
• Ierapetras Sewage environmental impact research
• Gialovas lagoon Oil Spill environmental impact
  prediction

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Procedures Materials

• IMBC - MDNS
• JULY 1999
• SGI O2 ORIGIN 200
• Fortran 77
• GrADS

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2-D Wind Coastal Circulation Model

• Bathymetry maps provided by Geographical Service
  of Defense
• dx 463 m

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2-D Wind Coastal Circulation Models Mathematical
Equation
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2-D Wind Coastal Circulation Models Solution

• dt 2.2 sec
• Finite differences in stagger grid
• Velocity vector in x, y components
• Surface elevation

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2-D Advective Transport Pollutant Model

• U, V, ?, from circulation model
• Origin of pollution (set by user)
• Constant or Instant pollutants outflow
• Effects Duration (set by user)
• Animations Output Time Step (set by user)

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2-D Advective Transport Pollutant Models
Mathematical Equation
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Dataflow Chart
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Animations Parameters

• Wind Direction NW
• Wind Velocity 8 beaufort
• Origin 25.187E, 35.350N
• Effects Duration 96 hrs

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Conservative Pollutant
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Non-conservative pollutant
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CIRCULATION and TRANSPORT MODELS in the
Internet

• http//kos.ics.forth.gr8000
• THETIS Presentation
• Waste Disposal
• Animation DEMO available SOON