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Fish ladder (en.wikipedia.org)

submitted 3 days ago by Plum@lemmy.world to c/wikipedia@lemmy.world

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[–] stoy@lemmy.zip 8 points 3 days ago

Fish cannon

A wet, flexible pneumatic tube uses air pressure to suck in salmon one at a time and gently shoot them out into the destination water. The system was originally designed by Bellevue, Washingtoncompany Whooshh to safely move apples.

[–] thisbenzingring 8 points 3 days ago (1 children)

VIVA THE FISH LATTER

all dams should have them and all fish should be free to move the water that is their home

[–] BossDj@lemm.ee 5 points 3 days ago (1 children)

Problem is that predators have learned to wait at the entrance and exit for easier meals

[–] thisbenzingring 3 points 2 days ago (1 children)

the predator factor is acceptable

the salmon that make it through will create hundreds of new salmon.... even if only half made it beyond the ladder to reproduce, it's better than none

[–] BossDj@lemm.ee 3 points 2 days ago (1 children)

There's "vs no ladder" but there's also "vs no dam"

[–] thisbenzingring 2 points 2 days ago

hydro electrics are a necessary

but not all dams are created equal. Bad dams need to go

[–] fubarx@lemmy.world 5 points 3 days ago

The Ballard Locks fish ladder in Seattle is pretty dope: https://citybop.com/seattle/ballard-locks-fish-ladder

[–] cron@feddit.org 4 points 3 days ago

There's a great video on this subject by the creator of the youtube channel "practical angineering".

How Do Fish Ladders Work?

[–] BossDj@lemm.ee 5 points 3 days ago

https://youtu.be/tElnn3GegLE

Bonneville Dam on the Columbia River - You can tour the dam and from inside there are windows to watch fish travel up the ladder. They seasonally recruit people to monitor and count to get a rough estimate of fish population. You can also watch from above. It's amazing.