Water is being pumped at a steady rate of 500 gpm from a 12in diameter well. Thewell draws water from an unconfined aquifer. The height of water in the aquifer in the equilibrium statebefore pumping is 100ft, and the drawdown at the well at steady state pumping is 40ft. The hydraulicconductivity of the aquifer determined from a pump test is 0.02ft/min. Determine the radius of influence.

A 30 cm diameter well completely 15 points penetrates a confined aquifer of permeability of 45 m/day. The thickness of the aquifer is 20 m. Under steady state of pumping the drawdown at the well found to be 3.0 m and the radius of influence was 300 m. Calculate the discharge of the well * Pumping well dia = 2r + Original piezometric surface Piezometric surface under pumping Aquiclude Flow Confined aquifer Aquiclude Well Operating in a Confined Aquifer 1.548 m^3/min 0.0258 m^3/min 0.258 m^3/min 0.0851 m^3/min

a 45 cm well in an unconditioned aquifer of saturated thickness (40+8) m yields (600+10(2) lpm under a drawdown of 4m at the pumping well. Assuming radius of influence of (500+10(3)m,   a. what is the hydraulic conductivity of the aquifer in m/day? b. what will be the drawdown 200 m from the well? c. what will be the piezometric head 400 m from the well

B- An unconfined aquifer has a thickness of 30m . A fully penetrating 20cm diameter well in this aquifer is pumped at a rate of 35 liter/ sec. the drawdown measured in two observation wells located at distance of 10m and 100m from the well are 7.5m and 0.5m respectively .Determine the average hydraulic conductivity of the aquifer. At what distance from the well the drawdown is insignificant? You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdt.com)

Q2/ A well of diameter 30 cm fully penetrates a confined aquifer of thickness 1.5 m. When pumped at a steady rate of 30 l/s the drawdowns observed in wells at radial distances of 10 m and 40 m are 1.5 m and 1 m, respectively. Compute the radius of influence, the hydraulic conductivity and drawdown at the well.

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?

3. A permeameter is filled with sand. When water is allowed to flow through the device, a flow rate of Q.er = 10 cm'/s is observed. The sand is dried and filled with oil. The total hydraulic head at the inflow and outflow ends of the permeameter are the same in both tests. Calculate the flow rate of oil Qol. Data: puil=0.9 pwaer Hlail = 1.8 lue

Seepage is occurring through a porous media shown in the figure. The hydraulic conductivity values (k,, k2, kg) are in m,/day. 00 Imprevious 个 15m P k, = 2 k, 3 10m 3m kg = 1 13m + 20m 10m 20m 10m The seepage discharge (m/day per m) through the porous media at section PQ is

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.

Please answer with complete solution and Fbd. A field sample of an unconfined aquifer is packed in a test cylinder. The length and diameter of the cylinder are 60cm and 8cm, respectively. The field sample is tested for a period of 2min under a constant head difference of 18.5 cm. As a result, 50cm3 of water is collected at the outlet. Determine the hydraulic conductivity of the aquifer sample.