Question

A 10 inches diameter well is drilled to the bottom of an unconfined aquifer. The water...

A 10 inches diameter well is drilled to the bottom of an unconfined aquifer. The water table is originally 500 ft above the bottom of the aquifer whose hydraulic conductivity is known to be 0.25 ft /day. If 100 gal/min is pumped from the well, what will be the equilibrium depth of the water in the well if the radius of influence is 1000 ft? How much drawdown should be expected at a distance of 250 ft from the well?

Homework Answers

Answer #1

The pumping through confined aquifer is computed by Dupits theory . The drawdown in well is denated as the diffrence between intial and final pheratic line depth inside the soil. See the solution.

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
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.
Observational wells were drilled in a cone of depression of artesian (confined) well. The drawdown in...
Observational wells were drilled in a cone of depression of artesian (confined) well. The drawdown in the observational wells at 9 m and 18 m from the center of the well were found to be 12 m and 10 m, respectively. If the hydraulic conductivity of the aquifer is 2.5 mm/min and the pumping flow rate from the well is 407 m3/hr    (i) Determine the thickness of the aquifer. (ii) Find diameter of the well if the drawdown at...
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...
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?...
Surface water is pumped into a design well for 5 days to a confined aquifer (T=97840...
Surface water is pumped into a design well for 5 days to a confined aquifer (T=97840 gpd/ft, Sc= 2 X10-4 ) in order to preserve surface water. The well diameter is 12 inches. Determine the maximum injection rate (gpm) such that groundwater level increase in the well will not exceed 10 feet during the 5-day injection.
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...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT