1) The groundwater underneath a hazardous waste disposal site is observed to be contaminated bytrichloroethylene (TCE). The data obtained for groundwater flow are as follows:Aquifer porosity = 0.45Aquifer hydraulic conductivity = 35 m/dGroundwater hydraulic gradient = 0.015Bulk density of aquifer materials = 1.8 g/cm3Fraction of organic carbon of aquifer materials = 0.015Kas = 0.63 Kowa)Estimate groundwater velocity (m/d)b) Estimate the retardation factor for TCEc) Estimate the TCE transport velocity (m/d)d)Estimate the time required for TCE to travel a distance of 100 m down gradient.e) The distance between TCE plume and a drinking well 100 m down gradient of groundwater flow is 100m. Ignoring dispersion, what would be the maximum concentration of TCE observed If TCE is degradedwith a half-life of 10000 h. Assume that the initial TCE concentration is 100 mg/L.

The following are the given data. Aquifer porosity = 0.45 Aquifer hydraulic conductivity = 35 m/d…

1) The groundwater underneath a hazardous waste disposal site is observed to be contaminated by trichloroethylene (TCE). The data obtained for groundwater flow are as follows: Aquifer porosity = 0.45 Aquifer hydraulic conductivity = 35 m/d Groundwater hydraulic gradient = 0.015 Bulk density of aquifer materials = 1.8 g/cm3 Fraction of organic carbon of aquifer materials = 0.015 KRS=0.63 KRX a) Estimate groundwater velocity (m/d) Estimate the retardation factor for TCE c) Estimate the TCE transport velocity (m/d) b) d) Estimate the time required for TCE to travel a distance of 100 m down gradient. e) The distance between TCE plume and a drinking well 100 m down gradient of groundwater flow is 100 m. Ignoring dispersion, what would be the maximum concentration of TCE observed If TCEs degraded with a half-life of 10000 h. Assume that the initial TCE concentration is 100 mg/L.

1) The groundwater underneath a hazardous waste disposal site is observed to be contaminated by trichloroethylene (TCE). The data obtained for groundwater flow are as follows: Aquifer porosity = 0.45 Aquifer hydraulic conductivity = 35 m/d Groundwater hydraulic gradient = 0.015 Bulk density of aquifer materials = 1.8 g/cm3 Fraction of organic carbon of aquifer materials = 0.015 KRS=0.63 KRX a) Estimate groundwater velocity (m/d) Estimate the retardation factor for TCE c) Estimate the TCE transport velocity (m/d) b) d) Estimate the time required for TCE to travel a distance of 100 m down gradient. e) The distance between TCE plume and a drinking well 100 m down gradient of groundwater flow is 100 m. Ignoring dispersion, what would be the maximum concentration of TCE observed If TCEs degraded with a half-life of 10000 h. Assume that the initial TCE concentration is 100 mg/L.

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

1) The groundwater underneath a hazardous waste disposal site is observed to be contaminated by
trichloroethylene (TCE). The data obtained for groundwater flow are as follows:
Aquifer porosity = 0.45
Aquifer hydraulic conductivity = 35 m/d
Groundwater hydraulic gradient = 0.015
Bulk density of aquifer materials = 1.8 g/cm3
Fraction of organic carbon of aquifer materials = 0.015
Kas = 0.63 Kow
a)
Estimate groundwater velocity (m/d)
b) Estimate the retardation factor for TCE
c) Estimate the TCE transport velocity (m/d)
d)
Estimate the time required for TCE to travel a distance of 100 m down gradient.
e) The distance between TCE plume and a drinking well 100 m down gradient of groundwater flow is 100
m. Ignoring dispersion, what would be the maximum concentration of TCE observed If TCE is degraded
with a half-life of 10000 h. Assume that the initial TCE concentration is 100 mg/L.

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