CEGR 6141 - Water Quality Modeling - Spring 2004

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Announcements

4/12/04

I've heard from several people, who either have questions or are having trouble finishing the exam because of the time needed.   For this reason, I've decided to give you until this Friday (in class) to finish the exam.  I'll answer questions on this exam during tonight's class.

4/4/04  The take-home test is now available (download it)

Course Info

• Office Hours:
  
• Class Meeting Times:  Monday 4-6 PM, Smith 217; Friday 12-12:50 PM, Smith 217(8)
  
• Description (see "Stream Pollution Analysis")
• Syllabus

Homework Assignments by Lecture

1.4, 1.13               2.11, 2.18, 2.20                   3.1,  3.7, 3.9                            
4.5, 4.6                5.3                                6.4, 6.8 (a,b,c only)
7.2 (use Heun and Runge-Kutta methods as well),  7.5       8.5 
9.7 (assume no dispersion, i.e. PFR)    
10.3 (assume channel is completely mixed into river at C), 10.4 
11.2, 11.8              12.2                               13.1 (pulse occurs @ x=500 m)
14.3 (approximate answer OK), 14.4 a,c                     15.2, 15.6 
16.4, 16.5              17.3                               19.4, 19.5
20.2, 20.6, 20.12       DO_sag (Lec. 21 & 22)              23.1
24.5                    25.1, 25.2                         26.3, 26.4 

Test Information

2000

Fall 2000 in-class test | Final

2001

Test #1 (in-class), extra problem | Test #2 (take-home) | Final

2004

Test #1 (in-class) | Test #2 (take-home) | Final

Qual2E Information

• QUAL2E site at Old Dominion U.
• Qual2E site at EPA
• Qual2E interface manual
• Qual2E manual: pp. 1-34 | pp. 35-92 | pp. 93-158 | pp. 159-189

More Class Information

• stability_spreadsheet
• MacCormack solution to problem 13_1
• Crank-Nicolson problem solved with a MATLAB script
• Crank-Nicolson problem solved with an EXCEL spreadsheet

This spreadsheet (Crank-Nicolson) provided by Jeff Hieronymus.  Jeff reports that the numerical solution seems to have an effective diffusion coefficient that is higher than it should be (see graphs).  See what you think, and see what you can do about it.

Modeling and General Information

• Download the .pdf Reader
• EPA Center for Exposure Assessment Modeling
• Rates, Constants, and Kinetic Formulations in Surface Water Quality Modeling (Bowie et al. 1985) .pdf format

sect1-1 | sect2-34 | sect3-1 | sect3-3 | sect3-6 | sect4-1 | sect6-1 | sect6-5 | sect7-1 | sect8-1 |
• EPA OS&T Publications, Water Quality Modeling and TMDL Guidance

 

Author: Jim Bowen Updated: 1/23/04