Answered: Compute the WQI (water quality index)…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

Compute the WQI (water quality index) for a water stream with the characteristics described below using the weighted linear sum approach by using the WQI link ( https://water-research.net/index.php/water-treatment/water-monitoring/monitoring-the-quality-of-surfacewaters )

Dissolved oxygen: 85 % saturation
Fecal coliforms: 1000/100 mL
pH: 6.95
BOD₅: 25 mg/L
Nitrates: 15 mg/L
Total phosphates: 2 mg/L
Temperature deviation: +1.0⁰C
Turbidity: 10 NTU
Total solids: 250 mg/L

What is the descriptor for the surface water body?

Briefly comment on your results. Based on the tool output, which are the tree factors that currently are more detrimental to water quality?

NOTE: I calculated the WQI using the link, WQI=56. Please check.

Water Quality Report
Factor
Weight
Quality Index
Dissolved Oxygen
0.17
91
Fecal Coliform
0.16
22
pH
0.11
87
Biochemical oxygen demand
0.11
7
Temperature Change
0.10
89
Total Phosphate
0.10
27
Nitrates
0.10
43
Turbidity
0.08
76
Total Solids
0.07
66
Your IP Address:
Factors Entered:
9.
Overall Water Quality Index:
56

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