$9\mathrm{.}4\mathrm{.}5.$ A $4-$m$-$wide irrigation channel discharges water over a $1\mathrm{.}7-$m high contracted $($both ends$)$ horizontal weir

$($

$$

$=$

$1\mathrm{.}86$

$)$

with a $1-$m$-$long horizontal crest. The upstream depth is $2\mathrm{.}3$ m$.$ This weir is to be replaced by an uncontracted horizontal weir that will maintain the same upstream depth. Determine the height of the weir if the discharge coefficient is based on Equation $9\mathrm{.}10$b $().$

THE ANSWER IS PROVIDED IN THE IMAGE IT IS p$=2\mathrm{.}08$ m $9\mathrm{.}4\mathrm{.}5.$ A $4-$m$-$wide irrigation channel discharges water over a $1\mathrm{.}7-$m high contracted $($both

ends$)$ horizontal weir $(C=1\mathrm{.}86$ with a $1-$m$-$long horizontal crest. The upstream depth is

$2\mathrm{.}3$ m $.$ This weir is to be replaced by an uncontracted horizontal weir that will maintain the

same upstream depth. Determine the height of the weir if the discharge coefficient is based

on Equation $9\mathrm{.}10$b $()9\mathrm{.}4\mathrm{.}5p=2\mathrm{.}08m$