Determine the critical time te (days) for the DO of the river. Calculate the minimum DO concentration Domin (mg/L) of the river. Draw and label properly the DO Sag Curve of the river. Is the assimilative
Determine the critical time te (days) for the DO of the river. Calculate the minimum DO concentration Domin (mg/L) of the river. Draw and label properly the DO Sag Curve of the river. Is the assimilative
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:Streeter-Phelps Model:
kaba
(e-Rt – e-kt) + Da(e-k)
k. - ka
1
In
k, – ka
k„ – k.
D =
to
ka La
1.135
T4 – 20
3.9 u0.5
BOD, = L, (1– e-kat)
k = k20 6T-20
kr,20
1.056 T 20 – 30
%3D
|
h1.5
1.024
Wastewater is being discharged into Diliman River, both waters having a
temperature of 20 °C. After mixing, it was found that the initial ultimate BOD of the
mixed water is 15 mg/L. The DO in the Diliman River right after the mixing point is at
saturation. At 20 °C, the deoxygenation rate constant (ka) is 0.3/day while the
reaeration rate constant (k,) is 0.5/day.
Express your computed values in at least four (4) significant figures.
1A. Determine the critical time t. (days) for the DO of the river.
18. Calculate the minimum D0 concentration DOmin (mg/L) of the river.
1C. Draw and label properly the DO Sag Curve of the river. Is the assimilative
capacity of the river restricted? Explain your answer.
Saturation Values of DO in Freshwater exposed
to specific saturated vapor pressure
Temperature (°C}
Dissolved Oxygen (mg/L)
14.62
12.77
10
11.29
15
10.08
20
9.09
25
8.26
30
7.56
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 1 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Recommended textbooks for you
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning