Problem 2. (65 Points) The town of Wilbraham is preparing to file a complaint wi

Question

Problem 2. (65 Points) The town of Wilbraham is preparing to file a complaint with the state Department of Natural Resources (DNR) that the City of Springfield is restricting its use of the Chicopee River due to the discharge of raw sewage by Springfield. Wilbraham is located 15.55 km downstream from Springfield. The treated Springfield wastewater discharged at a rate of 0.240 m/s and a temperature of 18°C, contains 2.0 mg/L of DO BODs @ 20°C of 94.0 mg/L and has a BOD bottle rate of 0.46 d1@ 20°C. Chicopee River has a flowrate of 1.08 m'/s with an average speed of 0.4 m/s and depth of 2.9 m. The town of Wilbraham paid to have some water samples taken in the river, and results of analyzing those samples indicate that the deficit prior to the point of discharge from the Springfield plant is 1.85 m/L, and that the ultimate BOD of the river is 11.4 mg/L at a river temperature of 16°C Research shows that a bed activity coefficient of 0.1 is reasonable for this stream. The DNR water quality criterion for the Chicopee River is 5. mg/L of DO. Your consulting firm has been hired by the Town of Wilbraham to provide them with the following information necessary for filing the complaint: a) the DO at Wilbraham; b) the magnitude of the critical DO and c) the location of the critical DO. d) Is the City of Springfield in violation of the DNR water quality criterion for DO (Does the town of Wilbraham have a legitimate complaint)? If so, suggest what might be done for Springfield to be in compliance. Extra Credit: Provide calculations to support your response.

Explanation / Answer

Wastewater of spring field

Q=0.24cumecs

T=18.c

D.O.=2mg/l

BOD =94mg/l

Length between Springfield and wilbtaham is 15.55 km

Chuckled river data

Q=1.08 cumec

Velocity=0.4m/s

Depth=2.9m

BOD ultimate =11.4 mg/l

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.