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46 Science Manual – Using Video Images for Fisheries Monitoring

Water velocity

Maintain water velocity of 0.5 ms

-1

(coarse fish) to 1.0 ms

-1

(salmonids) to deter fish

holding in the upstream exit channel.

B) If the pass is greater than 900 mm wide, it is necessary to have a camera

channel on each side of the fish pass exit. The light panel can be mounted in a

bed recess. No side recess is required (Figure 24):

Stop log grooves

Recess for lighting/polypropylene board

Camera channels

Baffle section

Flow

620mm

Downslope in this area (optional but

referable)

Figure 24: Plan view of a video counting arrangement on a Larinier pass more

than 900 mm wide

Side recess

Not required.

Bed recess

See general specification.

Camera channel

Camera channels to be installed central to the bed recess and directly opposite each

other (Figure 247). See general specification for details.

Camera mount

See general specification.

Stop log grooves

Stop log grooves (100 mm x 100 mm) situated on either side of the lighting to allow

isolation of lighting panels and camera chamber for work and maintenance (Figure

24.7).

Water velocity

Maintain water velocity of 0.5 ms

-1

(coarse fish) to 1.0 ms

-1

(salmonids) to deter fish

holding in the upstream exit channel.

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Radiant DVMD1 Manual de usuario Pagina 54