CIV E 632-COMPUTATIONAL HYDRAULICS AND HYDROLOGY
SPRING 2014
MIDTERM EXAM
MARCH 10, 2014, 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 inertia-pressure waves.

  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 is the main message of Cunge's paper on the Muskingum method?

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

  5. What is grid independence in the context of numerical modeling? Is the convex method grid independent?

  6. What is the basis of the controversy regarding the kinematic wave model?

  7. Why is the Li method to solve the kinematic wave equation more diffusive that the Schaake method incorporated in HEC-HMS?

  8. Compare the unit hydrograph and the overland flow methods in terms of their ability to simulate watershed rainfall-runoff.

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

  10. Why is a kinematic shock not likely to happen in a river like the Upper Paraguay?

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

  12. How does the diffusion wave equation with inertia (with Dooge and Ponce formulations of the hydraulic diffusivity) differ from the full dynamic wave solution of Fread?