Question $1($Problem $20-11)$: Estimate the head loss for a bar rack system for the following bar rack system with the following design parameters:

The approach velocity at average flow is $0\mathrm{.}4\frac{m}{s}$

The velocity at peak flow velocity is $0\mathrm{.}9\frac{m}{s}$

Two channels are needed for redundancy.

The bar width is $15mm.$

Bar spacing is $20mm.$

The angle from vertical is $30.$

The differential head loss for activation of cleaning rakes is $150mm.$

Maximum flow area blockage to initiate continuous operation of rakes is $50\%.$

The channel has a width of $1m$ and a slope of $0\mathrm{.}00025.$

of The channel is $1m$ wide and has a water depth of $1\mathrm{.}6m.$

Peak flow $41,920\frac{m^3}{d}.$

Average Flow rate $16,000\frac{m^3}{d}.$

Average flow depth $0\mathrm{.}995m.$

a$.$ Estimate the number of bars and opening for one channel.

b$.$ Estimate the head loss through a clean rack.

c$.$ Estimate the head loss through a $50\%$ clogged rack.

d$.$ Check the velocity through the bar rack at the average flow rate meets the average flow rate.

e$.$ Determine the peak and average flow rates for the channel.

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