water flows from a lake into a steep natural channel. the water surface elevation of the lake is 97.0 with respect to the datum. the channel properties are given below. determine the flow rate in the channel Hint: Construct a table of top widths, and areas. determine the critical depth by interpolation. Elevation ft 91.0 91.5 92.0 92.5 93.0 93.5 94.0 94.5 95.0 95.5 96.0 96.5 97.0 Top Width ft 0 9 15 19 18 19.5 22 27 29 31 34 37 40