cee4324-5984-f11hw6

cee4324-5984-f11hw6 - Fill out the following influence...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Virginia Tech Department of Civil and Environmental Engineering CEE 4324/5984 – Open Channel Flow Homework #6: Flow Resistance and Normal Depth Due November 20, 2011 Problem 1: Given: Q = 50 ft 3 /s S = 0.01 ft/ft b = 20 ft Manning’s n = 0.02 Find: Critical depth: y c : Normal depth: y 0 : Classify Reach: (steep or mild?) Now let’s see how modest changes in the “givens” affects normal depth and the Froude number. Let each of the parameters shown below change by a modest amount (suggest ~1-2 percent).
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Fill out the following influence chart: Influence Chart Increase in this Parameter Effect on Normal Depth Effect on Froude Number Q S b Mannings n Problem 2: You are asked to design a rectangular channel. The discharge is 50 ft 3 /s, slope is 0.01 ft/ft, Mannings n is 0.02 (i.e. like in Problem 1 above.) Your design is defined as most efficient if the cross-sectional area is minimized. What channel width, b , will produce the most efficient channel for these conditions?...
View Full Document

Ask a homework question - tutors are online