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If well B was contaminated, how long would it take for the contaminant to show up in well A? O a.t = 13.85 years O b.t = 0.03 years Oct = 11.32 years O d.t = 4.15 years

If well B was contaminated, how long would it take for the contaminant to show up in well A? O a.t = 13.85 years O b.t = 0.03 years Oct = 11.32 years O d.t = 4.15 years

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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**Question:** If well B was contaminated, how long would it take for the contaminant to show up in well A? **Options:** - a. t = 13.85 years - b. t = 0.03 years - c. t = 11.32 years - d. t = 4.15 years **Explanation:** There are no diagrams or graphs associated with this question.
Transcribed Image Text:**Question:** If well B was contaminated, how long would it take for the contaminant to show up in well A? **Options:** - a. t = 13.85 years - b. t = 0.03 years - c. t = 11.32 years - d. t = 4.15 years **Explanation:** There are no diagrams or graphs associated with this question.
### Confined Aquifer Monitoring through Fully Penetrating Wells A confined aquifer has an average thickness of 20 meters. Two fully penetrating wells, designated as Well A and Well B, are utilized to monitor the water quality of the aquifer (refer to the figure below). Details and operational parameters of the wells are as follows: - **Well A** is actively pumped, with a discharge rate of 1000 cubic meters per day (m³/day). - **Well B** serves exclusively as an observation well and is not pumped. - The act of pumping Well A results in a water surface drop of 2 meters in the well. - The diameter of Well A is 2 meters. - The diameter of Well B is 0.5 meters. - The distance between the centers of Well A and Well B is 500 meters. - The soil porosity of the aquifer is 30%. #### Schematic Figure Description: The figure illustrates a cross-sectional view of the two wells penetrating the confined aquifer, with the following features annotated: 1. **Wells Configuration**: - *Well A* and *Well B* are shown as vertical lines penetrating the aquifer layer. - The distance between the wells is marked as 500 meters center to center. - Each well crosses the full thickness of the confined aquifer, which is labeled as 20 meters deep. 2. **Pumping and Flow Indication**: - An arrow indicates the flow direction within the aquifer. - The reduction in the water surface level due to pumping Well A is marked as 2 meters. 3. **Ground and Aquifer Zones**: - Above the aquifer, the unsaturated or lesser permeable layers are shown. - The confined aquifer itself is depicted with a hatching pattern and labeled accordingly. #### Exercise: Based on the provided details, answer the following questions to enhance your understanding of aquifer dynamics and the impacts of well pumping on water levels: 1. Calculate the rate of decline in water level at Well B if it persists for a certain period. 2. Discuss the influence of pumping Well A on the overall groundwater flow and quality. 3. Describe the role of porosity in aquifer behavior and water retention. This exercise aims to facilitate a comprehensive understanding of confined aquifers, well hydraulics, and their impact on groundwater resources.
Transcribed Image Text:### Confined Aquifer Monitoring through Fully Penetrating Wells A confined aquifer has an average thickness of 20 meters. Two fully penetrating wells, designated as Well A and Well B, are utilized to monitor the water quality of the aquifer (refer to the figure below). Details and operational parameters of the wells are as follows: - **Well A** is actively pumped, with a discharge rate of 1000 cubic meters per day (m³/day). - **Well B** serves exclusively as an observation well and is not pumped. - The act of pumping Well A results in a water surface drop of 2 meters in the well. - The diameter of Well A is 2 meters. - The diameter of Well B is 0.5 meters. - The distance between the centers of Well A and Well B is 500 meters. - The soil porosity of the aquifer is 30%. #### Schematic Figure Description: The figure illustrates a cross-sectional view of the two wells penetrating the confined aquifer, with the following features annotated: 1. **Wells Configuration**: - *Well A* and *Well B* are shown as vertical lines penetrating the aquifer layer. - The distance between the wells is marked as 500 meters center to center. - Each well crosses the full thickness of the confined aquifer, which is labeled as 20 meters deep. 2. **Pumping and Flow Indication**: - An arrow indicates the flow direction within the aquifer. - The reduction in the water surface level due to pumping Well A is marked as 2 meters. 3. **Ground and Aquifer Zones**: - Above the aquifer, the unsaturated or lesser permeable layers are shown. - The confined aquifer itself is depicted with a hatching pattern and labeled accordingly. #### Exercise: Based on the provided details, answer the following questions to enhance your understanding of aquifer dynamics and the impacts of well pumping on water levels: 1. Calculate the rate of decline in water level at Well B if it persists for a certain period. 2. Discuss the influence of pumping Well A on the overall groundwater flow and quality. 3. Describe the role of porosity in aquifer behavior and water retention. This exercise aims to facilitate a comprehensive understanding of confined aquifers, well hydraulics, and their impact on groundwater resources.
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