Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 18, Problem 4PEB
To determine
The groundwater flow velocity
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Tracer dye is introduced to sand and gravel aquifer in a gravel pit. The dye appears 28.5 hours 3.8 km away from where the dye was introduced. What is the groundwater flow velocity?
True or False
1. If a well is drilled into a confined aquifer, the water can rise above its level in the aquifer because of the extra hydrostatic (fluid) pressure; which is called an artesian system. The water in an artesian system will rise all the way to the ground surface.
2. In areas suffered from surface subsidence, solutions such as pumping water back underground are likely to work.
A non-artesian well is drilled in an aquifer with a fairly horizontal water table. The well (φ = 25 cm) has a discharge of 408 m3 /hr, creating a 250 m wide cone of depression. If the height/depth of the water table is 60 m and the aquifer permeability is 8 m/day, determine the drawdown. Include also diagram or drawing.
Chapter 18 Solutions
Integrated Science
Ch. 18.1 - Prob. 1SCCh. 18.1 - Prob. 2SCCh. 18.1 - Prob. 3SCCh. 18.2 - Prob. 4SCCh. 18.2 - Prob. 5SCCh. 18.2 - Prob. 6SCCh. 18.2 - Prob. 7SCCh. 18.2 - Prob. 8SCCh. 18.2 - Prob. 9SCCh. 18.2 - Prob. 10SC
Ch. 18.2 - Prob. 11SCCh. 18 - Describe in general all the things that happen to...Ch. 18 - Prob. 2CQCh. 18 - Prob. 3CQCh. 18 - Compare the advantages and disadvantages of using...Ch. 18 - Prepare arguments for (a) agriculture, (b)...Ch. 18 - Prob. 6CQCh. 18 - Prob. 7CQCh. 18 - Prob. 8CQCh. 18 - Prob. 9CQCh. 18 - Prob. 10CQCh. 18 - Prob. 11CQCh. 18 - Prob. 12CQCh. 18 - Prob. 13CQCh. 18 - Prob. 14CQCh. 18 - Prob. 15CQCh. 18 - Considering the distribution of all the water on...Ch. 18 - Prob. 17CQCh. 18 - Some people believe that constructing a reservoir...Ch. 18 - Prob. 19CQCh. 18 - Prob. 20CQCh. 18 - Prob. 21CQCh. 18 - Prob. 1PEACh. 18 - Prob. 2PEACh. 18 - Prob. 3PEACh. 18 - Prob. 4PEACh. 18 - Prob. 5PEACh. 18 - Prob. 6PEACh. 18 - Prob. 7PEACh. 18 - Prob. 8PEACh. 18 - Prob. 1PEBCh. 18 - Prob. 2PEBCh. 18 - Prob. 3PEBCh. 18 - Prob. 4PEBCh. 18 - Prob. 5PEBCh. 18 - Prob. 6PEBCh. 18 - Prob. 7PEBCh. 18 - Prob. 8PEB
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- If a 1.0 m3 s-1flow water treatment plant uses ten sedimentation basins with an overflow rate of 15 m3 day-1 m-2, what should be the surface area (m2) of each tank?arrow_forwardAn underground storage tank at a service station leaks into a water table. A soluble component of the fuel is detected in a public water supply well 547 m away 1 year 31 days later. What is the groundwater flow velocity?arrow_forwardA confined aquifer at a depth of 34.8 m is encountered during the drilling of a water well. The surface elevation of the well is 267.4 m. What must the minimum static groundwater elevation be in this well for it to be considered artesian?arrow_forward
- What are the pros and cons of living on a floodplain?arrow_forwardWhat are problems associated with groundwater extraction?arrow_forward2) Given: Saturated hydraulic conductivity – 1.42 m/day Depth of unconfined aquifer -42 m a) What is the transmissivity of the aquifer? (m?/day) 3) What is the difference between the depth to groundwater in a monitoring well and the potentiometric surface? 4) From the equipotential grid below, draw in the flow lines starting at 1,2,3,and 4. Water table 2 4arrow_forward
- If an 18.9 L (5 gallon) bucket of PCE is released (and equally distributed) into a 3.79x10^8 L (100,000,000-gallon) aquifer, will the PCE standard of 5 microgram/L under the Safe Drinking Water Act be exceeded?arrow_forward12.. A dissolved contaminant with a concentration of 20 µg/mL is being advecte d with flowing groundwater at a velocity of 0.45 m/day in an aquifer which has a porosity of 25%. Groundwater from the aquifer discharges into a nearby strea m. What is the mass flux of the contaminant into the stream if the aquifer is 2.0 metre thick and 125 m wide where it discharges into the stream?arrow_forwardDerive the hour unit hydrograph from the following data of effective rainfal and direct runoff. Area of watershed is 24.5 km. Time (hrs) Effective rainfall (mm) 2. 3. 22 28 16 Time (hrs) Direct runoff (m/sec) 4.4 3 50.8 4 6. 18.8 59.8 36.4 8.arrow_forward
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