For an aquifer with a bulk density of 2 g/cm3 containing 0.5% organic carbon, estimate the estimate the retardation factor for the common PAH napthalene (used in mothballs).  If the porosity of the aquifer is 0.24, the hydraulic conductivity is 10-3 cm/sec and the hydraulic gradient is 0.001, how fast will a plume of napthalene travel?  Additional Info: Napthalene: log Kow = 3.36 Relationship of Koc to Kow for napthalene: log Koc = 0.937 log Kow – 0.006

Q: ts to determine the permeability of an aquifer. The aquifer has a test well 300-mm in diameter with…

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Q: Seepage is occurring through a porous media shown in fig. The hydraulic conductivity values (k1,k2,…

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Q: Calculate specific yield of an aquifer if a = 9.9 and B = -0.60 Discharge = 80 L/s Max drawdown =…

A: Specific yield is defined as the ratio of (1) the volume of water that a saturated rock or soil will…

Q: ater is recharged to an aquifer through a well of 200mm diameter penetrating up to the base of the…

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Q: Consider the figure of a dam shown below. The soil underneath the dam foundation has a coefficient…

A: Given: The coefficient of permeability (k) is 3.5 x 10-3 cm/s. The water head on the upstream side…

Q: A confined aquifer is pumped with a constant rate through abstraction well. There is a big lake of…

A: Confined aquifer- It is aquifer that completly saturated with water. Top and bottom both layers are…

Q: B = 3 m 7.6 m H = 6 m B = 45° a = 30° Impervious layer Given the permeability of the earth dam, k =…

A: Darcy's law states that the flow velocity is directly proportional to the hydraulic gradient (I).…

Q: An unconfined fine sand aquifer has a base elevation of 50 ft (15.2 m). From elevation 50 to 68 ft…

A: Solution: Given Data: k1=0.8 ft/dayk2=3.0 ft/dayz1=18 ftz2=27 ftFormula=kx=k1z1+k2z2z

Q: 4. A field sample of an unconfined aquifer is packed into a test cylinder. The length and diameter…

A: Constant Head Permeability Test :Q=kiAVt=khLAwhere : V= Volume of water collected , t =time of test…

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: ermeability that behaves as a one-dimensional aquifer with a hydraulic conduc /day, effective…

A: Given:- effective porosity=0.3 hydraulic gradient=0.03m/m initial concentration of cyanide=42mg/l To…

Q: A well of 0.3m radius in a confined aquifer was pumped at a steady rate of 30 li/s from a fully…

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Q: In a certain alluvial basin of 120 km2, 100 Mm3 of ground water was pumped in a year and the ground…

A: Given vol of water pumped(V)=100 Mm3Area of basin=120 km2water drop by 5mspecofic y tetention…

Q: Q2: The initial pressure of a 200 ft thickness reservoir is 6000 psia, and the initial porosity is…

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Q: (b) The model below represents a watershed in a mountainous area. Precipitation A Groundwater…

A: Watershed in a mountainous area: Geology in the watershed has a lot to do with groundwater recharge…

Q: The hydraulic conductivity, k of sool is 9.11x10^-6 cm/s at a temperature of 20 degrees C. Determine…

A: k=9.11 * 10-8 m/s To find absolute permeability

Q: Estimate the hydraulic conductivity of an unconfined aquifer from the following pump test data and…

A: Depth of restrictive layer  =21 mand depth of water table=4.0 m Height of static water from…

Q: QI) An unconfined aquifer has a thickness of 33 m. A fully penetration 20 cm diameter well in the…

A: Considering the Thickness of Unconfined Aquifer from the Water Table.The Diagram is Given Below:2-…

Q: Civil Engineering The Goshute Valley in Nevada has some basin fill unconfined aquifers that are…

A: To find drop in water table

Q: Refer to Figure 8.13. Given; the width of the dam, B = 6 m; length of the dam, L = 120 m; S 3 m; T'…

A: Sheet pile : Sheet piles are interlocking lengths of sheet materials driven into the ground to…

Q: An unconfined aquifer has a thickness of 30m . A fully penetrating 20cm diameter well in this…

A: Given: The thickness of the aquifer is 30 m. The diameter of the well is 20 cm. The pumped rate of…

Q: DAM 30 FT FLOW T = 20 FT SAND IMPERVIOUS ROCK B = 240 FT The total length of the dam shown is 800…

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Q: The pressure heads of an aquifer at 2000 m are 55.5 m and 36 m. The hydraulic conductivity of the…

A: Length = L = 2000m   Pressure heads - h1 = 55.5m h2 = 36m   Hydraulic conductivity = K = 76m/day…

Q: Estimate sludge production (Px) based on the following conditions: microbial decay coefficient (kd)…

A: Given Influent fow= 1m3/s  Q=1000 liter/s  Q=10001×24×60×60 liter/day=86.4×106 liter/dayQ=86.4 MLD…

Q: Yuri wants to determine the permeability of an aquifer. The aquifer has a test well 300-mm in…

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Q: A tube-well of 20 cm of diameter fully penetrate a horizontal, confined aquifer of infinite…

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Q: (B): For the concrete dam shown in figure below. The water heads are 16 m on the upstream side and 2…

A: Given  Upstream water level = 16 m Downstream water level = 2m Horizontal permeability = 6×10^-3…

Q: from the following data: 30 cm Diameter of the well 3 m Drawdown in the well Effective length of the…

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Q: A 300 mm diameter test well penetrates 24 m below the static water table. After 24 hours of pumping…

A: GivenH=24ms1=1.2ms2=0.6mr1=34mr2=96mQ=69ls=0.069m3sh1=24-1.2=22.8mh2=24-0.6=23.4so,For unconfined…

Q: 6. A mining process discharges a silty water into a clean brook at the rate of 5 cubic meters per…

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Q: A tube well of 20 cm of diameter fully penetrate a horizontal, homogeneous and isotropic confined…

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Q: Which one of the following statements is correct? a. Storativity of a confined aquifer is several…

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Q: 100 m R1 R2 R3 R5 R4 R8 R7 R6 R9 Dry Cleaner Gas Station Oil UST R10 If aquifer hydraulic gradient,…

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Q: Samples from monitoring wells indicate that a plume of contaminants migrate under a dump. The plume…

A: Given  Maximum pumping Rate : 5000 M3/day

Q: Problem #2 GW Aquifers Suppose an unconfined aquifer lies over a confined aquifer as shown below.…

A: Introduction- The aquifer is considered to be unconfined when groundwater comes into direct contact…

Q: The oil volume in the above reservoir is 1. 5 × 10° m² at initial pressure 27.0 MPa, the bubble…

A: Assuming volume value to be 1.5*10 m2 as that given in question seems to be a typos error Formation…

Q: (a) A hydrocarbon reservoir has three layers with the following permeabilities from the upper layer…

A: Given  Thickness= 2 ft

Q: The hydraulic conductivity of an aquifer is 0.002 cm/sec, the hydraulic gradient is 0.004, and the…

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Q: isotropic confined aquifer of hydraulic conductivity 2 m/day.

A: Given: Diameter = 15 cm Rate of flow = 265 L/min Hydraulic conductivity = 2m/day To determine  drop…

Q: 405n03 SIUI 100 m R1 R2 R3 R5 R4 R8 R7 R6 R9 Dry Cleaner Gas Station Oil UST R10 If aquifer…

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Q: Yuri wants to determine the permeability of an aquifer. The aquifer has a test well 300-mm in…

A:

Q: Q2) For the concrete dam in Fig. 2, calculate the 1) seepage quantity in cm³/sec, and 27 the pore…

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Q: Question 1 The discharge from a fully penetrating well under steady state pumping in a confined…

A: Given:-  s1 = 3 m s2 = 2m r1 = 5m r2=12m B = 20 m Q = 1000 lpm  To find :- K

Q: Yuri wants to determine the permeability of an aquifer The aquifer has a test well 300-mm in…

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Q: A confined aquifer is 50 m thick and 0.5 km wide. Two observation wells are located 1.4 km apart in…

A: The length and breadth of the aquifer isL=50m , B=0.5km=500mArea=L×B=50×500=25,000m2Distance between…

Q: An underground storage tank has discharged diesel fuel into groundwater. A drinking-water well is…

A: Given: The difference in hydraulic head is dh=40 cm=0.4 m. The hydraulic conductivity is K=45 m/day.…

Q: A well in an unconfined aquifer is pumped at the rate of 50 L/s ( 800 gal/min.). The thickness of…

A: Given data- Unconfined Aquifer- Discharge (Q) = 50 L/s = 50×10-3 m3/s Thickness of the aquifer = 30…

Q: isotropic with k=5.8x10-'m/s. (а) Determine the loss through seepage in cubic metres per year.

A: Given:- L=450m k=5.8 x 10-7 m/s To find: a) loss through seepage b) slip circle analysis of slopes…

Q: Problem 1 - An unconfined aquifer is 10 m thick and is being pumped so that one observation well…

A: Thickness = 10 m Distance = 76m Drawdown = 0.5 m Coefficient of permeability= 50 m/day Distance from…

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.