Name: ____________________ Red ID _______________ Grade: _______

Instructions: Closed book, closed notes. Use engineering paper. When you are finished, staple your work in sequence (1 to 4), and return this sheet with your work.

1. (20%) A hydraulically wide channel is operating at Froude number F = 0.25. The unit-width discharge is q = 2.5 m²s^-1. What are two Langrange absolute celerities?

2. (20%) You are observing the rising flood stage of a major river. At your observation point, at a certain time the discharge is 495 m³ s^-1, and the stage is rising at the rate of 5 mm hr^-1. The surface width of the river in the study reach is 125 m. What is your estimate of the present discharge at the upstream end of the reach, located 15 km upstream? How could you improve the estimate?

3. (20%) Teton Dam failed June 5, 1975, in Idaho, releasing 2,000,000 cfs. At a distance of 100 miles downstream, the flow was estimated at 50,000 cfs. What type of wave was most likely acting?

4. (40%) Please answer each question in one clear and concise paragraph:

   • When does inlet control occur in a culvert? When does outlet control occur in a culvert?

   • Why does the hydraulic jump occur? What is the formula for the energy loss in terms of sequent depths?

   • Compare in tabular form the kinematic, diffusion, dynamic, and mixed kinematic-dynamic waves in terms of their celerity and attenuation properties.

   • What are three ways in which the Seddon formula can be expressed? Which one did Seddon present in the year 1900?

   • What is the difference between sediment production and sediment yield? Why is there a difference? What is this difference a function of?

   • What is the difference between sediment transport and sediment routing? When is sediment routing applicable?

   • What is the Rouse number? Explain.

   • What are the Brune curves? Explain.