| 摘要 |
A moulded fish ladder 1 includes a longitudinally extending ramp defining a ramp surface 2 over which water 6 can flow from one end of the ramp to the other. The moulding includes depressed relief features 4 to assist pooling along the ramp so that the fish can rest in the pools during ascent of the ramp. The moulding is also provided with a plurality of raised relief features 3 moulded in an off-set spaced relationship to each other both along and laterally on the ramp surface. The raised relief features serve to provide an inhibition to flow of water down the ramp. (62) Divided Out of 556176
|
