6. When just full, a reservoir has a surface area of 1 km², and this area is approximately constant as the water depth above this level, h, increases (where h is in metres). The outflow from the reservoir is given (in m'/s) by the formula 0 = 100 h*². Consider a scenario in which this reservoir is subjected to a flood with flow rates given in the table below. Time (hours) Inflow (m’/s) 0 1 |2 |3 4 5 O 30 20 10 5 0 1. What is the total volume of water represented by this flood? 2. Carry out a flood storage routing calculation. Find a) the maximum water depth in the reservoir, b) its maximum outflow rate, and c) the time when this occurs.

2. You're designing a stilling basin and you need to know the minimum length of that basin and also how much energy loss will be achieved before flow is released into the downstream channel. Given the basin width is 10-feet, the flow rate is 240 CFS, the upstream froude number is found from hydraulic modeling to be 4.0. Solve the following: • Minimum length of the stilling basin. • Energy loss within the stilling basin (Calculate both energy loss in feet and in tons). • The depth of water being released outside of the stilling basin. • The Froude Number being released from the Stilling Basin. • Look at USBR Design of Small Dams and Write a paragraph (4-5 sentences) of the recommended stilling basin you would propose for the hydraulic scenario.

3. At a particular time, the storage in a river reach is 60 x 10³ m³. At that time, the inflow into the reach is 10 m³/s and the outflow is 16 m³/s. after two hours, the inflow and the outflow are 18 m3/s and 20 m³/s respectively. Determine the change in storage during two hours period and the storage volume after two hours. 4 500 x 106 m³ of water has been stored in the reservoir of a dam at the beginning of November

Water flows in a rectangular channel at a depth of 1.5 m. A 30 cm high smooth hump produces a drop of 15 cm in the water surface elevation. Neglecting losses, estimate the discharge per unit width of the channel. Solution: Refer to Figure 2.18. Let suffixes 1 and 2 refer to sections upstream of the hump and on the hump respectively as indicated in the figure. Energy Line V Е, У, 1 0.15 m √₂ Hump AZ = 0.30 m 2