A container of Atrazine (500 g) is dumped into a river 2.3 km upstream of a municipal water intake pipe. The cross-sectional area of the river is 5.7 m2. Assume that the Atrazine is dumped as a point source.If the river flow is 8.25m3/s and the longitudinal dispersion coefficient is 0.1 m2/s, what is the maximum concentration (in ppm) expected at the intake.How spread out (in the direction of flow) is the atrazine at the time the peak concentration occurs at the intake pipe? Assume 2 standard deviations on either side of the peak is a good estimate of spread.

Given, M = 500 gm or 0.5 kg L = 2.3 km or 2300 m A = 5.7 m2 Q = 8.25 m3/s D = 0.1 m2/s

Answered: A container of Atrazine (500 g) is…

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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A container of Atrazine (500 g) is dumped into a river 2.3 km upstream of a municipal water intake pipe. The cross-sectional area of the river is 5.7 m². Assume that the Atrazine is dumped as a point source.

If the river flow is 8.25m³/s and the longitudinal dispersion coefficient is 0.1 m²/s, what is the maximum concentration (in ppm) expected at the intake.

How spread out (in the direction of flow) is the atrazine at the time the peak concentration occurs at the intake pipe? Assume 2 standard deviations on either side of the peak is a good estimate of spread.

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