CIV E 632-COMPUTATIONAL HYDRAULICS AND HYDROLOGY
SPRING 2014
MIDTERM EXAM
MARCH 10, 2014, 1900-2015
Name: _________________ Red ID ________________ Grade: __________
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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.
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- Compare the celerity and attenuation properties of kinematic, diffusion, dynamic, and inertia-pressure waves.
- What do overland flow and slow-rising flood waves have in common that they lend themselves to description by kinematic and diffusion wave models?
- What is the main message of Cunge's paper on the Muskingum method?
- What is the Courant number?
What Courant number optimizes numerical diffusion and minimizes numerical dispersion in Muskingum-Cunge routing?
- What is grid independence in the context of numerical modeling? Is the convex method grid independent?
- What is the basis of the controversy regarding the kinematic wave model?
- Why is the Li method to solve the kinematic wave equation more diffusive that the Schaake method incorporated in HEC-HMS?
- Compare the unit hydrograph and the overland flow methods in terms of their ability to simulate watershed rainfall-runoff.
- Under what four physical conditions is the kinematic shock more likely to develop?
- Why is a kinematic shock not likely to happen in a river like the Upper Paraguay?
- How do the Hayami, Dooge, and Ponce hydraulic diffusivities differ from each other?
- 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?
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