A groundwater pump has an unknown discharge extraction rate from a confined aquifer. The thickness is 8m and K=40m/day. To estimate its flow rate, 2 observation wells were installed. The first well is 2.5km from the pump and another well 6.9km from the first well further. The observed drawdown from original water level of 150m were 12m in the 1st well and 7m in the 2nd well. If the groundwater pump has a diameter of 0.80m: Determine how far in meters from the pump its influence or no drawdown effect on water table.

Q: A field pumping test was conducted from an aquifer of sandy soil of 4 m thickness confined between…

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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: 2. A 20-cm-diameter confined-aquifer well is pumped at a constant rate of 15 L/s. After 10 days of…

A:

Q: After 2 months of pumping, water levels stabilize with a head at well 1 of 132 ft and a head at well…

A: Given, h1 = 132 ft h2 = 143.5 ft  T = 450 ft2/day      NOTE : As per guidelines, first question is…

Q: 2: A (50 cm) well fully penetrates an unconfined aquifer of saturated depth 80 m. When a discharge…

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Q: A pumping test carried out in a 50 m thick confined aquifer resulted in a flow rate of 600 l/min.…

A: Answer  Based on the given data let us draw the diagram showing given data Calcultions shown in…

Q: observe the head and drawdown of the groundwater. Calculate the steady flow pumping required for the…

A: Given: Confined depth = 40 mh1 = 85.3 mh2 = 90.6 mr1 = 30 mr2 = 100 m

Q: step-drawdown A test was performed on the MX W ber 1980. The radius of the well casing is 5 inches,…

A: solution-  data given - initial pumping rate = 210GPMinitial lequid level , h0 = 231.36 m  At step 1…

Q: (c) A well fully penetrated in a 30 m thick confined aquifer. After a long period of pumping at a…

A: The flow rate is Q=3250 m3/day or Q=0.04 m3/s. The distances are, r1=50 mr2=125 m The drawdowns are,…

Q: Suppose a well 0.30m in diameter has been pumped at a rate of 5,000cu.m/day for a long enough time…

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Q: A field pumping test was conducted from an aquifer of sandy soil of 4 m thickness confined between…

A:

Q: Assume that an aquifer being pumped at a rate of 40 cubic feet per minute is confined and pumping…

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Q: The discharge from a fully penetrating well under steady state pumping in a confined aquifer is…

A: Given  Discharge Q=1000 liter/minute  =1.0 m3/min=0.0166 m3/sec Thickness of Aquifer, B =20m r1=6m…

Q: For steady state flow to a fully penetrating well in a confined aquifer, the drawdown at radial…

A: Solution is attached below as

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

A: Given data,  q = 0.05 m³/s B = 10 m Diameter of well = 5 meter

Q: a. If an artesian aquifer is intercepted by a well drilled 36.6 m (120 ft) deep and the water rises…

A: Artesian aquifer is the underground layer that contains groundwater under the pressure that causes…

Q: The following criteria are needed to reach the "steady state" EXCEPT.. i. The water level in the…

A: The following criteria are needed to reach the "steady state" EXCEPT..  iv. The water level in all…

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: The static level of water table in an unconfined aquifer was 35m above the underlying impermeable…

A:

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

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Q: (b) Give the characteristics of different formations in which groundwater exists. A fully…

A: Given- Artesian well-discharge-Q=25 l/s=2160 m3/daystorage coefficient S=4.5×10-4transmissivity…

Q: unconfined aquifer which is 33.2 m thick. The drawdown at the pumping well is 1.34 m and the…

A: According to given data  A 0.34 m diameter well fully penetrates an unconfined aquifer which is 33.2…

Q: well 12in in diameter penetrate 108 ft below the static water table. After a long period of pumping…

A: h1=108-12=96 fth2=108-7.4=100.6 ftr1=57 ftr2=148 ft To find: (a) transmissivity of the aquifer(b)…

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 20 cm well completely penetrates an unconfined aquifer with k= 1 m/sec and the height of water…

A: Calculation of drawdown at distance 200 m from  well when k= 1 m/sec and well yields at 0.5 m3/s

Q: A community of 15,000 capita and fire demand of 35 L/s for six hours is to be served by a 50 cm…

A: Given data, Hydraulic conductivity K = 100 m/d Radial distance r1 = 150 m Radial distance r2 = 50 m…

Q: Two groundwater wells are pumping near an observation well. When only pumping well 1 is operating,…

A: It is given that :

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: 9.7. Two observation wells were installed along a streamline in an unconfined aquifer 1,000 m (3,280…

A: Distance between two wells (L) = 3280 ftHydraulic conductivity (k) = 32.8 ft/dayEffective porosity…

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

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Q: 26: ( ) A 40 cm well fully penetrated an unconfined aquifer of saturated depth 15 m. when a…

A: We have to estimate the coefficient of permeability of the aquifer and also have to determine the…

Q: A pumping test was carried out in a confined aquifer 16 m thick overlain by an impermeable layer 32…

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

Q: Determine the position of the fresh and saline water interface and maximum permitted pumping rate if…

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Q: Two monitoring wells are installed along the flow path with the following characteristics. If a…

A: Given: The porosity is 0.5. The hydraulic conductivity is 1000 m/day. The distance between two wells…

Q: 3b) A well of r = 0.328 ft , drainage area 650 acres and Pwr=4500 psia in the reservoir of following…

A: Given data Radius of the wall=0.328ftA=650 acresμ=1.67 cppoof=4500 psia=3102…

Q: Question- For steady state flow to a fully penetrating well in a confined aquifer, the drawdown at…

A: Given data- Steady-state flow- Drawdown- S1=4.92 m, S2=5.45 m, Radial distance- r1=1.56 m, r2=1.80…

Q: How would I calulate the time it would take for the plume to reach the next well in it's path? Plume…

A: Answer We know that Velocity = Distance(L)/Time(T) Here Velocity is seepage velocity (Vs) of plume…

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.