hw6ees3040_fa10

hw6ees3040_fa10 - concentration. Correction to given answer...

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EES 3040: Introduction to Environmental Engineering Homework 6 Water Quality; DO in Rivers, Lakes Due Thursday, October 14, 2010 at 1:15 pm Reading Assignment: Chapter 4, pp. 156-162; Chapter 8, pp. 282-307 D&M2 Chapter 5, pp. 205-215; Chapter 9, pp. 357-384 Problems (30 points maximum) : 1. (6 pts.) D&M1 Chapter 8, Problem 8-15 or D&M2 Chapter 9, Problem 9-19 Hint: Note that the given info is in terms of BOD 5 and the problem is asking for the ultimate BOD after mixing (L oa ). 2. (6 pts.) D&M1 Chapter 8, Problem 8-19 or D&M2 Chapter 9, Problem 9-25 Hint: Read the 2nd sentence carefully: "The DO . .. after mixing is at saturation". 3. (12 pts.) D&M1 Chapter 8, Problem 8-22 or D&M2 Chapter 9, Problem 9-28 Clarification: The problem is asking you to calculate two DO concentrations: 1) the DO concentration at Gotterdammerung, located 5.79 km downstream, and 2) the critical (minimum) DO
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Unformatted text preview: concentration. Correction to given answer in text: critical point, tc = 0.719 days 4. (6 pts.) Answer the following (3-4 sentences for each). Please type your answers. a. D&M1 Ch 4, Review Question 24 (pg. 165) or D&M2 Ch 5, Review Question 24 (pg. 216) b. D&M1 Ch 8, Review Question 9 (pg. 316) or D&M2 Ch 9, Review Question 9 (pg. 393) c. D&M1 Ch 8, Review Question 10 (pg. 316) or D&M2 Ch 9, Review Question 10 (pg. 393) Notes: Answers are provided for you to check your work. You must complete the entire problem (including all parts) and show your work to receive full credit. Be sure to include your honor code pledge and list the names of others with whom you worked (if applicable)....
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