Question

In: Civil Engineering

60 cm diameter well is being pumped at a rate of 1360 litres/minute. measurements in a...

60 cm diameter well is being pumped at a rate of 1360 litres/minute. measurements in a nearby test well were made at the same time as follows. At a distance of 6 m from the well being pumped, the drawdown was 6 m, and at 15 m the drawdown was 1.5 m. The bottom of the well is 90 m below the ground water table.

(a) Find out the coefficient of permeability.

(b) If all the observed points were on the Dupuit curve, what was the drawdown in the well during pumping?

(c) What is the sp. capacity of the well? (d) What is the rate at which water can be drawn from this well?

Solutions

Expert Solution


Related Solutions

Water is being pumped through a horizontal pipe that is 36.0 m long and 13.5 cm...
Water is being pumped through a horizontal pipe that is 36.0 m long and 13.5 cm in diameter. A pump maintains a gauge pressure of 742 Pa at a large open tank at one end of the pipe. The other end of the pipe is open to the air. If this pipe is replaced by a second one of length 9 m and diameter 5.0 cm, what gauge pressure must the pump provide to give the same volume flow rate...
Water at 200 Fahrenheit is pumped from a storage tank at the rate of 50 gallons/minute....
Water at 200 Fahrenheit is pumped from a storage tank at the rate of 50 gallons/minute. The motor for the pump supplies work at the rate of 2 hp. The water goes through a heat exchanger, giving up heat at the rate of 40,000 BTU/minute(Q Net In), and is delivered to a second storage tank at an elevation 50 feet above the first tank. What is the temperature of the water delivered to the second tank?
Researchers studying anthropometry collected body girth measurements and skeletal diameter measurements, as well as age, weight,...
Researchers studying anthropometry collected body girth measurements and skeletal diameter measurements, as well as age, weight, height and gender, for 507 physically active individuals. The histogram below shows the sample distribution of heights in centimeters. (a) What is the point estimate for the average height of active individuals? What about the median? (b) What is the point estimate for the standard deviation of the heights of active individuals? What about the IQR? (c) Is a person who is 1m 80cm...
Drag measurements were taken for a 5 cm diameter sphere in water at 20 °C to...
Drag measurements were taken for a 5 cm diameter sphere in water at 20 °C to predict the drag force of a 1 m diameter balloon rising in air with standard temperature and pressure. Given kinematic viscosity of water (v) = 1.0 X 10-6 m2/s and kinematic viscosity of air (v) = 1.46 X 10-5 m2/s. Perform the Buckingham Pi theorem to generate a relationship for FD as a function of the independent variables. Assume the drag FD is a...
Drag measurements were taken for a 5 cm diameter sphere in water at 20 °C to...
Drag measurements were taken for a 5 cm diameter sphere in water at 20 °C to predict the drag force of a 1 m diameter balloon rising in air with standard temperature and pressure. Given kinematic viscosity of water (v) = 1.0 X 10-6 m2/s and kinematic viscosity of air (v) = 1.46 X 10-5 m2/s. Perform the Buckingham Pi theorem to generate a relationship for FD as a function of the independent variables. Assume the drag FD is a...
A thermocouple is being calibrated with a well designed ice bath. The measurements are given in...
A thermocouple is being calibrated with a well designed ice bath. The measurements are given in the table to the right. Using any mathematical tool of your choice,the mean is .174 and standard deviation of the sample is .24228. I recommend excel for this problem and a simple example is included on the module for this class. a) What is the bias error in this sample, assuming a perfect ice bath? b) Assume you have corrected for the bias error...
A steel drill rod that is 10 mm in diameter and 20 cm long is being...
A steel drill rod that is 10 mm in diameter and 20 cm long is being heat treated in an oil bath. The 1050°C rod is quenched and held at 700°C and then quenched a second time to 30°C. Calculate the quantities of heat that must be removed at the two quenching stages. Weight density of steel as ρw = 76 kN/m3 , The specific heat of steel is c= 0.50 kJ/(kg . ºC).
A 12-inch well penetrating a 100-ft thick eenfinedr aquifer is pumped at a rate of 100...
A 12-inch well penetrating a 100-ft thick eenfinedr aquifer is pumped at a rate of 100 gpm for 10 years. Determine the drawdown of 100-ft from the well. The storage coefficient of the aquifer is 0.001, permeability 500 gpd/ft, r/B = 0.2, and porosity= 0.3?
Water is being pumped into a leaky inverted conical tank at a rate of 10 m^3/h....
Water is being pumped into a leaky inverted conical tank at a rate of 10 m^3/h. The tank has a height of 9 m and the diameter at the top is 6 m. If the water level is rising at a rate of 0.2 m/h when the height of the water is 6 m, how fast is the water leaking out at that time?
A particle of diameter 0.2 μmand density 1 g cm-3is being carried by an airstream at...
A particle of diameter 0.2 μmand density 1 g cm-3is being carried by an airstream at 1 atm and 298 K in they direction with a velocity of 100 cm s-1. The particle enters a charging device and acquires a charge of two electrons (the charge of a single electron is 1.6 x 10-19C) and moves into an electric filed of constant potential gradient Ex= 1000 V cm-1perpendicular to the direction of flow. (Hint: The effect of gravity and drag...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT