The segment of river shown has a rectangular cross-section, with width 50 ft. The river bed is at angle theta=10 degrees from horizontal. The average velocity is 2 ft/s at the upstream end, and 3 ft/s at the downstream end. The vertical depths are as follows: delta_Z1= 4 ft and delta_Z2 =3:5 ft. Fresh water is owing at a temperature of 60 degrees F.
Find:
a)Find mass flow rate (m=roeV*A) at control sections 1 and 2
b)Calculate the rate of change of water mass in the segment.