Problem: Draw a specific energy diagram for a flow with a specific discharge of qw= 0.010 m /s (either use Excel to plot the diagram or solve for different values of E and h within the subcritical and supercritical regime and plot by hand. Choose at least 3 points within each regime). What is the water depth at critical flow?
Hint: It is easiest to solve for the critical flow depth first and then choose a couple of points above and below this depth. To solve for critical flow, take the derivative of the specific energy and set dE/dh=0.