A channel has been designed to convey clear water to a fish hatchery. The design calls for a flow depth of 2.0 ft and a velocity of 2.0 ft/s. The channel is very wide so the side effects can be neglected and the hydraulic radius taken as equal to the depth. It is to be constructed in sand which has a median diameter ds = 0.915 mm (0.003 ft). For a flat bed in this material the Darcy-Weisbach friction factor is estimated to be f = 0.0185 and the required channel slope is S = 0.000145. The water temperature is 20°C and the kinematic viscosity uu is = 1.08 x 10-5 ft2/s. The specific gravity of the sand is 2.65. Clear water is admitted to the channel and it is imperative that no material be scoured from the bed since any sand in the hatchery will result in instantaneous death of all the fish. Using Shields' diagram, determine if the existing design is adequate to deliver clear water to the hatchery.
A channel has been designed to convey clear water to a fish hatchery. The design calls for a
flow depth of 2.0 ft and a velocity of 2.0 ft/s. The channel is very wide so the side effects can
be neglected and the hydraulic radius taken as equal to the depth. It is to be constructed in
sand which has a median diameter ds = 0.915 mm (0.003 ft). For a flat bed in this material
the Darcy-Weisbach friction factor is estimated to be f = 0.0185 and the required channel
slope is S = 0.000145. The water temperature is 20°C and the kinematic viscosity υυ is = 1.08
x 10-5 ft2/s. The specific gravity of the sand is 2.65. Clear water is admitted to the channel
and it is imperative that no material be scoured from the bed since any sand in the hatchery
will result in instantaneous death of all the fish. Using Shields' diagram, determine if the
existing design is adequate to deliver clear water to the hatchery.
AI-generated content may present inaccurate or offensive content that does not represent bartleby’s views.
Unlock instant AI solutions
Tap the button
to generate a solution
