CIV E 632-COMPUTATIONAL HYDRAULICS AND HYDROLOGY
FALL 2019
MIDTERM EXAM
OCTOBER 17, 2019, 1900-2015

Name: _________________ Red ID ________________ Grade: __________

Instructions: Closed book, closed notes. Answer only ten (10) questions. Use engineering paper. When you are finished, staple your work in sequence, and return this sheet with your work.

  1. Compare the celerity and attenuation properties of kinematic, diffusion, dynamic, and gravity (inertia-pressure) waves. State in tabular form.

  2. What do overland flow and slow-rising flood waves have in common that they lend themselves to description by kinematic and diffusion wave models?

  3. What did Seddon do to advance the science of hydraulics?

  4. What did Cunge do to advance the science of hydraulics?

  5. What are the differences between constant and variable-parameter Muskingum-Cunge routing? State in tabular form.

  6. What is the Courant number? What Courant number optimizes numerical diffusion and minimizes numerical dispersion in Muskingum-Cunge routing?

  7. What is grid independence in the context of numerical modeling? Why is the Muskingum-Cunge method grid independent, while the convex method is not?

  8. What is the cause of attenuation in unsteady open-channel flow?

  9. What is kinematic shock? Under what four physical conditions is the kinematic shock more likely to develop?

  10. How do the Hayami, Dooge, and Ponce hydraulic diffusivities differ from each other?

  11. What are the two (dimensionless) parameters describing convection, diffusion and dispersion in a dimensionless treatment of flood wave propagation?

  12. What is runoff diffusion? How does it differ for reservoirs, channels, and watersheds? Explain.