A pumping test was carried out in a confined aquifer 16m thick overlain by an impermeable layer 32 m thick.Rateobservation wells located at 15ofpumping125,000cm3/s ;drawdownsinwascenter of the pumping level wererespectively, from the initialradius of the pumping well is 0.30 m.and 30 m from the1.80 m and 1.30 m,groundwater level. Thea. Compute the transmissivity of the aquifer.b. What is the drawdown at the test well? (1

Using formula for confined aquiferQ=2πT(s1-s2)ln(r2r1)

A pumping test was carried out in a confined aquifer 16 m thick overlain by an impermeable layer 32 m Rate thick. of pumping 125,000 cm3 /s ;drawdowns in was observation wells located at 15 m and 30 m from the center of the pumping level were 1.80 m and 1.30 m, respectively, from the initial groundwater level. The radius of the pumping well is 0.30 m. a. Compute the transmissivity of the aquifer. ( b. What is the drawdown at the test well? (

A pumping test was carried out in a confined aquifer 16 m thick overlain by an impermeable layer 32 m Rate thick. of pumping 125,000 cm3 /s ;drawdowns in was observation wells located at 15 m and 30 m from the center of the pumping level were 1.80 m and 1.30 m, respectively, from the initial groundwater level. The radius of the pumping well is 0.30 m. a. Compute the transmissivity of the aquifer. ( b. What is the drawdown at the test well? (

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: A well of 0.5 m diameter is pumped from confined aquifer at 0.08 m'/s. The draw- down recorded at…

A: Thiems equation and dupits equation is generally used for confined and unconfined aquifier analysis.

Q: Please explain part 1 (ii) of the question given. 1) i) A 6 inch diameter well that fully…

A: The given data is: Diameter of well (dw) = 6 inch = 0.5 ft Thickness of aquifer (b) = 40 ft…

Q: A well pumping test was carried out in an unconfined soil layer of thickness 15 m to determine its…

A: Given data in question Unconfined aquifer Discharge Drawdowns Radius of influence Total height…

Q: answer the question from the image

A: The average hydraulic conductivity of the aquifer is approximately 4.17 m/s, and at a distance of…

Q: Explain how drawdowns predicted by the Hantush-Jacob (1955) leaky aquifer solution differ from…

A: Leaky aquifers When a leaky aquifer is pumped-up, the piezometric level of the geological formation…

Q: 5. Field Permeability Testing Calculate the permeability of the soil from a confined aquifer given…

A: Note: Hi! Thank you for the question As per the honour code, We’ll answer the first question since…

Q: 5. A capture well is pumping at a rate of 152,000 ft³/day. The confined aquifer has a thickness of…

A: Given: Pumping rate, Q = 152000 ft3/day Aquifer thickness, b = 102 ft hydraulic conductivity, K =…

Q: A 50 dm diameter well gives a discharge of 0.05 m³/sec. Two observations well were made at a…

A: Given- Diameter of well =50 mm, Discharge Q=0.05 m3/sec. Depth of well H=10 m, Drawdown- s1=3 m at…

Q: A pumping test was made in a sand layer extending to a depth of 16m. The initial groundwater table…

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

A pumping test was carried out in a confined aquifer 16
m thick overlain by an impermeable layer 32 m thick.
Rate
observation wells located at 15
of
pumping
125,000
cm3/s ;drawdowns
in
was
center of the pumping level were
respectively, from the initial
radius of the pumping well is 0.30 m.
and 30 m from the
1.80 m and 1.30 m,
groundwater level. The
a. Compute the transmissivity of the aquifer.
b. What is the drawdown at the test well? (1

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

A well was constructed to pump water from a confined aquifer. Two observation wells were constructed at distances of 350 m and 800m respectively. At a steady pumping rate of 0.39 m^3/min, the drawdown in the observation wells were respectively equal to 1.6 m and 7.8 m. Diameter of the test well is 0.95 m and thickness of confined aquifer is 16 m. a. Determine the hydraulic conductivity of the soil in m/min. (IN EXPONENTIAL FORM AND IN 2 DECIMAL PLACES) b. Determine the drawdown at the test well in m. (IN 2 DECIMAL PLACES) c. What is the value of the transmissivity of the confined aquifer in m^2/day? (IN 2 DECIMAL PLACES)
C8
A single ideal pumping well, with radius of 1.0 ft and flow rate of 155 gpm, exists in an ideal confined aquifer. The aquifer has a saturated thickness of 82 ft. The pump continues running until equilibrium conditions are reached. The drawdown at the pumping well is 42 ft, and the drawdown at an observation well 138 ft away is 7.5 ft. Determine: Find the transmissivity in ft^2/day and hydraulic conductivity in ft^2/day Find the radius of influence in feet.
A site consists of a homogenous dense silty sand layerof 8m thickness which is underlain by an imprevious stiff clau stratum. The initial water table was at 3m depth below the ground level. A pumping test was carrier out by pumping water at the rate of 0.7 m^3/min. Onservation wells were dug into the ground at 25m and 50m distances from the center line of the well. At steady state (i.e., when there was no change in water levels in the observation wells), the water levels in the two wells dropped by 500mm and 150mm, respectively. Determine the hydraulic conductivity of the clay sand layer.
Need answer ASAP
A pumping test in an aquifer has yielded the following data: A pumping well with a diameter of 15 cm pumps at a rate of 12 m³/day, and draws the aquifer down by 3.6 m. Drawdown at a monitoring well 20 m away is 1.1 m. a) Calculate the Transmissivity of the aquifer. Assume this number is representative of the entire aquifer. b) Determine saturated hydraulic conductivity, and identify a soil type from table 7.2 in the Margulis book. The aquifer thickness is 20 m. ●
Please solve,.
An unconfined aquifer is 10 m thick and is being pumped so that one observation well placed at a distance 76 m shows a drawdown of 0.5 m. On the opposite side of the extraction well is another observation well 100 m from the extraction well, shows a drawdown of 0.3 m. Assume the coefficient of permeability of 50 m/day. a.) What is the discharge f the extraction well? b.) Suppose the well at 100 m from the extraction well is now pumped. Show with a sketch what this will do to the drawdown. c.) Suppose the aquifer sits on an aquaclude that has a slope of 1/100. Show with a sketch what this will do to the drawdown.
In a field testing, the hydraulic gradient between two peizometers is 1.11, the area of flow is 4.08 m2 and the hydraulic conductivity of the aquifer material is 0.94 m/day, calculate the discharge in m3/day. Note that discharge cannot be negative
A capture well is pumping at a rate of 1700 m^3 /day from a confined aquifer with a hydraulic conductivity of 425 m/day, an initial hydraulic gradient of -0.00098 and a saturated thickness of 22 m. Water is flowing from west to east. a. What is the maximum width of the capture zone in m to the nearest ones place? b. What is the distance from the well to the stagnation point in m to the nearest ones place? Consider what sign makes sense. c. True or False: The majority of the capture zone is to the west of the capture well.
A pump test was carried out in an unconfined aquifer of k = 3x10^-6 m/s with a flow rate of 25m3/hour. The radius of the well is 0.5m and the aquifer has a depth of 80m above an impermeable stratum. The drawdown in an observation well at a distance of 150m from the well is 2.5m. Calculate the depth of water in the well and the radius of influence??
TELEGRAM Q1: A 30cm diameter well penetrates vertically through an aquifer to an impermeable stratum located 18.0 m below the static water table. After a long period of pumping at a rate of 1.2 m3/min, the drawdown in test holes 11m and 35 m from the pumped well is found to be 3.05 and 1.62m respective. What is the hydraulic conductivity of the aquifer? Express in meters per day. What is its transmissivity? Express in cubic meters per day per meter. What is the drawdown in the pumped well?