A large stream has a reoxygenation constant of 0.4 per day (on base 10). At a velocity of 0.85 m/s; and at the point at which an organic pollutant is discharged, it is saturated with oxygen at 10 mg/L (D= 0). Below the outfall, the ultimate demand for oxygen is found to be 20 mg/L and the deoxygenation constant is 0.2 per day (on base 10). What is the dissolved oxygen at 48.3 km downstream?

A large stream has a reoxygenation constant of 0.4 per day (on base 10). At a velocity of 0.85 m/s; and at the point at which an organic pollutant is discharged, it is saturated with oxygen at 10 mg/L (D= 0). Below the outfall, the ultimate demand for oxygen is found to be 20 mg/L and the deoxygenation constant is 0.2 per day (on base 10). What is the dissolved oxygen at 48.3 km downstream?

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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Concept explainers

Groundwater Flow

The term groundwater refers to the water which is found beneath the earth's surface. Pores present in the soil and rocks with fractures make a passage for rainwater to enter the earth's surface and deposit as groundwater. The flow nature and direction of groundwater under the earth's surface directly impacts the strength and compressibility of the soil, which reflects its ability to support structural loads.

Question

A large stream has a reoxygenation constant of 0.4 per day
(on base 10). At a velocity of 0.85 m/s; and at the point at
which an organic pollutant is discharged, it is saturated
with oxygen at 10 mg/L (D= 0). Below the outfall, the
ultimate demand for oxygen is found to be 20 mg/L and
the deoxygenation constant is 0.2 per day (on base 10).
What is the dissolved oxygen at 48.3 km downstream?

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