Question

A 25 cm well fully penetrates a confined aquifer of 35 m thickness and has a...

A 25 cm well fully penetrates a confined aquifer of 35 m thickness and has a permeability of 13.5 m/day When a steady state discharge of 2400 L/min was being pumped for a long time, observation well at radial distances of 140 m indicated drawdown of 2.2 m, Find: 1) The transmissivity of the aquifer, 2) The drawdown at the pumping well, 3) The radius of influence, 4) The drawdown at 30 m from the well

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Q2.A 30 cm diameter well completely penetrates completely penetrates a confined aquifer of permeability 45 m/day....
Q2.A 30 cm diameter well completely penetrates completely penetrates a confined aquifer of permeability 45 m/day. The depth of the aquifer which is equal to the length of the strainer is 20 m. Under steady state of pumping, the drawdown at the well was found to be 3.00 m and the radius of influence was 300 m. Draw the aquifer with all the available information given Calculate the discharge in m3/s Note: R is the radius of influence, rw is...
A confined aquifer of thickness 35 m is pumped at a rate of 100 L/s from...
A confined aquifer of thickness 35 m is pumped at a rate of 100 L/s from a well of radius 0.5 m. The recorded drawdowns in a monitoring well located 200 m from the pumping well are given in Table. 3.3. Use the steady-state approach to estimate the hydraulic conductivity and transmissivity, if it is assumed that the condition is reached equilibrium after 1-day of constant pumping. time (s) Drawdown (cm) 0 0 10 0.6 100 5 1000 60 10000...
A 30 cm well penetrates 45 m below the static water table. After a long period...
A 30 cm well penetrates 45 m below the static water table. After a long period of pumping at a rate of 1200 lpm, the drawdown in the wells 20 m and 45 m from the pumped well is found to be 3.8 and 2.4 m respectively. Determine the transmissivity (=K*aquifer width) of the aquifer. What is the drawdown in the pumped well?
a) A well is pumped at an equilibrium flow of 454 gpm to determine a confined...
a) A well is pumped at an equilibrium flow of 454 gpm to determine a confined aquifer permeability. The thickness of the aquifer is 100 ft and the drawdown in observation wells is noted as 3 ft and 9 ft at 100 ft and 10 ft respectively, from the pumped well, What is the permeability¿ b) Using the same data as a) exceptmconsider an unconfined aquifer that was totally saturated before pumping, what is an estimate of permeability¿
5) A pumping test was conducted in a confined aquifer using a constant pump discharge of...
5) A pumping test was conducted in a confined aquifer using a constant pump discharge of 6.00 m3/hr. The drawdowns measured at an observation well located 20.0 m from the pumped well are in the following table. Determine the aquifer transmissivity, the storage coefficient, and the drawdown after 50 hours. Time(hr) 0.05 01.0 0.20 0.50 1.0 2.0 5.0 10.0 20.0 S at 20m well 0.52 0.66 0.79 0.98 1.11 1.25 1.43 1.57 1.71
An unconfined aquifer is 25 m thick. Groundwater is being pumped out from a 0.10 m...
An unconfined aquifer is 25 m thick. Groundwater is being pumped out from a 0.10 m diameter fully penetrating well. The pumping rate is Qp=0.15 m3 /min. The aquifer is relatively sandy with a hydraulic conductivity of 8.2 m/d. Steady-state drawdown of 1.5 m is observed in a monitoring well 3 m away from the pumping well. Estimate (a) the drawdown 10 m away from the pumping well, (b) the drawdown in the pumping well.
A 20 inch diameter well fully penetrates a 100 ft deep unconfined aquifer. Drawdowns at two...
A 20 inch diameter well fully penetrates a 100 ft deep unconfined aquifer. Drawdowns at two observation wells located at 90 feet and 240 feet from the pumping well are 23 feet and 21.5 feet respectivly. K = 1400 gpd/ft squared Determine discharge Q from pumping the well in gpm
NEED PART B ONLY A)Determine the conductivity K in gallons/day/ft^2 of a fully penetrating well in...
NEED PART B ONLY A)Determine the conductivity K in gallons/day/ft^2 of a fully penetrating well in a confined aquafer. The aquifer is 100ft think with a steady state pumping rate of 1200 gpm. The drawdown is an observation well 75 ft away is 14ft and the drawdown in the second observation well 500 ft away Is 1.2ft B) if the above data of pumping rate, drawdowns in different wells are for an unconfined aquifer, what will the conductivity be? What...
1. Drawdown at a 0.20 m diameter, fully-penetrating well, which has been pumping at a steady...
1. Drawdown at a 0.20 m diameter, fully-penetrating well, which has been pumping at a steady rate of 2500 m3/day for a long time, is determined to be 1.2 m. Drawdown at an observation well 10 m away is 0.90 m. a. The aquifer is unconfined with a hydraulic head far from the well of 10.0 m. Determine the hydraulic conductivity of the aquifer. b. How would your answer change if your aquifer was confined and 3 m in thickness?...
1. A well having 34 cm diameter penetrates 26m below the static water level. After 24...
1. A well having 34 cm diameter penetrates 26m below the static water level. After 24 hours of pumping at 5500l/min, the water level in a test well at 95m away is dropped by 0.7m and at a well 38m away the drawdown is 1.2m. Determine A. Transmissibility of the aquifer(2pts) B. The drawdown in the main well if the distance from the center of the main well to the point in the aquifer where the draw down becomes zero...