The problem states a trapezoidal channel: The sidewalls rise 2 feet for every 1 foot of horizaontal and T=12 feet. Q-854 cfs at critical flow.
The problem says the channel is carrying Q at the critical flow. CERM 11 edition , pg. 19-18 says:
(Q^2/g = A^3/T ) for non rectangular channels.
The problem asked for the channel bottom width. So, I solve for Area (A).
My question is , how can I solve for Area if I don't have the critical depth nor the channel width ???
A=db+mb ???
will appreciate any help.
The problem says the channel is carrying Q at the critical flow. CERM 11 edition , pg. 19-18 says:
(Q^2/g = A^3/T ) for non rectangular channels.
The problem asked for the channel bottom width. So, I solve for Area (A).
My question is , how can I solve for Area if I don't have the critical depth nor the channel width ???
A=db+mb ???
will appreciate any help.