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3. Threpicometerslcated 1000 m apart botom in the same horizontal aquifer. piezometers located 1000 m apart...
yo 2. Given the following information on three piezometers, A, B, and C, in the same...
yo 2. Given the following information on three piezometers, A, B, and C, in the same horizontal unconfined aquifer (K = 10 m/day), draw groundwater contours, give the direction of flow, calculate the hydraulic gradient, and the Darcy velocity. 6*8 - A, B, and Care 1,000 meters apart from each other. - A is directly north of B. 25 30 Ground Elevation (m) Depth to Water (m)
3. (20 pt) The following field notes were taken at a nest of piezometers installed side...
3. (20 pt) The following field notes were taken at a nest of piezometers installed side by side at a single site (this are used to find the vertical flow): means that the these piezometers В A Piezometer 200 200 200 Elevation at surface (mean average sea level) 20 40 50 Depth of piezometers (m) 15 25 10 Depth to water (m) Let A, B, and C refer to the points of measurement of piezometers A, B, and C. Calculate...
At a construction site, two piezometers have been installed. Piezometer A has a screen 8 m...
At a construction site, two piezometers have been installed. Piezometer A has a screen 8 m below ground surface and piezometer B has a screen 4 m below ground surface. The water level in piezometer A is 1 m below ground surface and the water level in piezometer B is 1.5 m below ground surface. Test pits at this site indicate that the water table is 1.55 m below ground surface. (5 marks) a) Is groundwater flowing up or down?...
Question 2 The soil profile at a level site consists of a 3-m thick layer of...
Question 2 The soil profile at a level site consists of a 3-m thick layer of sandy clay, overlaying an 8-m thick layer of loose sand, overlaying stiff gravelly clays that extend to depths greater than 20 m. The water table is at a depth of 2 m and the ground water is initially hydrostatic. The total unit weight of the upper sandy clay, above or below the water table, is 18 kN/m3. The total unit weight of the loose...
Calculate b,c, and d 1. The following data were collected at a nest of piezometers (several...
Calculate b,c, and d
1. The following data were collected at a nest of piezometers (several piezometers of different depths located within 1 m of each other). Well 1 Elevation at surface (m.a.s Depth to piezometer (m Well 2 Well 3 375 27 375 17 Depth to static water level (m) 2 *measured from surface elevation down to water table Answer the following questions: Draw a picture of the well nest with the elevation head, pressure head and water table...
2. Parallel drainage canals are installed in a rectangular unconfined aquifer. They fully penetrate the aquifer and are 50 m apart. The elevation difference between the land surface and the bottom of...
2. Parallel drainage canals are installed in a rectangular unconfined aquifer. They fully penetrate the aquifer and are 50 m apart. The elevation difference between the land surface and the bottom of the canals is 5 m and the canal stages are 2.5 m. Assume a soil hydraulic conductivity of 0.8 m/day Recharge Land surface 50ml Drainagelcanal 2.5m Impermeable layer (a) Sketch the approximate shape of the water table between the two canals under a highly urbanized condition in which...
An unconfined aquifer has an initial thickness of 15.80 m. The initial water table is horizontal...
An unconfined aquifer has an initial thickness of 15.80 m. The initial water table is horizontal and located 4.7 m below the ground surface. A 15-cm diameter well is driven to the bottom of the aquifer and pumped at 3000 Lpm until steady state conditions are achieved. At this time the drawdown at the well is 4.35 m and the drawdown in an observation well located 850 m away is 0.12 m. (a) Make a sketch that defines the problem....
A confined aquifer is 3 m thick. The potentiometric surface drops 17 cm between two wells...
A confined aquifer is 3 m thick. The potentiometric surface drops 17 cm between two wells that are 240 m apart. If the hydraulic conductivity of the aquifer is 6.4 m/day and the effective porosity is 0.17, (a) determine the volume of water flowing per day through a strip of the aquifer that is 3 m wide; (b) determine the groundwater flow velocity; (c) calculate the velocity of a contaminant in this aquifer if dry bulk density of aquifer material...
The sediments that formed the Nubian aquifer system are much older than those of the High...
The sediments that formed the Nubian aquifer system are
much older than those of the High Plains aquifer system or the
sediments of Bangladesh. The oldest rocks in the aquifer are
Cambrian in age (541 to 485 million years old). After deposition,
these sediments were buried, compacted, and cemented, and lithified
to form sedimentary rocks. Two cross sections are shown. The sands
that form the sandstones were deposited by rivers and wind in
nearshore (beach) areas. The sandstone is distinguished...
Question 4: (25 marks) The figure below shows a thin aquifer connecting two irrigation canals 1000...
Question 4: (25 marks) The figure below shows a thin aquifer connecting two irrigation canals 1000 m apart and running parallel to each other. The canal to the left has a water surface elevation of 1007 m while that to the right has a water surface elevation of 1008.5 m. The sand aquifer connecting the two canals has a constant thickness of 1.5 m, bottom elevation of 1000m, porosity of 0.3 and a hydraulic conductivity of 250 m/d. The sand...
yo 2. Given the following information on three piezometers, A, B, and C, in the same horizontal unconfined aquifer (K = 10 m/day), draw groundwater contours, give the direction of flow, calculate the hydraulic gradient, and the Darcy velocity. 6*8 - A, B, and Care 1,000 meters apart from each other. - A is directly north of B. 25 30 Ground Elevation (m) Depth to Water (m)
3. (20 pt) The following field notes were taken at a nest of piezometers installed side by side at a single site (this are used to find the vertical flow): means that the these piezometers В A Piezometer 200 200 200 Elevation at surface (mean average sea level) 20 40 50 Depth of piezometers (m) 15 25 10 Depth to water (m) Let A, B, and C refer to the points of measurement of piezometers A, B, and C. Calculate...
Question 2 The soil profile at a level site consists of a 3-m thick layer of sandy clay, overlaying an 8-m thick layer of loose sand, overlaying stiff gravelly clays that extend to depths greater than 20 m. The water table is at a depth of 2 m and the ground water is initially hydrostatic. The total unit weight of the upper sandy clay, above or below the water table, is 18 kN/m3. The total unit weight of the loose...
Calculate b,c, and d
1. The following data were collected at a nest of piezometers (several piezometers of different depths located within 1 m of each other). Well 1 Elevation at surface (m.a.s Depth to piezometer (m Well 2 Well 3 375 27 375 17 Depth to static water level (m) 2 *measured from surface elevation down to water table Answer the following questions: Draw a picture of the well nest with the elevation head, pressure head and water table...
2. Parallel drainage canals are installed in a rectangular unconfined aquifer. They fully penetrate the aquifer and are 50 m apart. The elevation difference between the land surface and the bottom of the canals is 5 m and the canal stages are 2.5 m. Assume a soil hydraulic conductivity of 0.8 m/day Recharge Land surface 50ml Drainagelcanal 2.5m Impermeable layer (a) Sketch the approximate shape of the water table between the two canals under a highly urbanized condition in which...
The sediments that formed the Nubian aquifer system are
much older than those of the High Plains aquifer system or the
sediments of Bangladesh. The oldest rocks in the aquifer are
Cambrian in age (541 to 485 million years old). After deposition,
these sediments were buried, compacted, and cemented, and lithified
to form sedimentary rocks. Two cross sections are shown. The sands
that form the sandstones were deposited by rivers and wind in
nearshore (beach) areas. The sandstone is distinguished...
Question 4: (25 marks) The figure below shows a thin aquifer connecting two irrigation canals 1000 m apart and running parallel to each other. The canal to the left has a water surface elevation of 1007 m while that to the right has a water surface elevation of 1008.5 m. The sand aquifer connecting the two canals has a constant thickness of 1.5 m, bottom elevation of 1000m, porosity of 0.3 and a hydraulic conductivity of 250 m/d. The sand...
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