$!$EMERGEENCY $!!$

ater flows in a rectangular open channel having a width of $2$ m with a flow rate of $10\frac{m^3}{s}$ as lown in the figure. If the flow depths before and after the step are given as $y_1=3m,$ and $y_2=2m$ determine;

a$)$ state of the flow at upstream and downtream sections

b$)$ step height $z$

c$)$ draw the specific energy versus flow depth curve and show the values of $y_1,y_2,E_1,E_2.$

upstream

downstream

$(1)$

$(2)$