SedimentsurfaceMain flow direction

xy

z

Measuringpoint

Flux contribution

x

Footprint definition: smallest area that contributes with 90%of the flux

Footprint prediction – 3D modeling

Source: Peter Berg

Footprint prediction – 3D modeling

xy

z

Measuringpoint

Main flow direction

Modeling turbulent transport and dispersion of a tracer released from different locations on sediment surface

Source: Peter Berg

Footprint prediction – 3D modeling

0 1000 2000 3000 4000 5000 6000 7000 8000150

100

50

0

-50

-100

-150

y (

cm

)

x (cm)

Relatively smooth sediment surface (z0 = 0.1 cm)

Measuring height over sediment surface: h = 30 cm

90%

10%

Source: Peter Berg

Footprint prediction – 3D modeling

0 1000 2000 3000 4000 5000 6000 7000 8000150

100

50

0

-50

-100

-150

y (

cm

)

x (cm)

30 cm20 cm10 cm

15 cm5 cm

25 cm

)(zhhh++L 02 log12180.171.77277 Length of footprint:

Source: Peter Berg