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: Q1: A field sample of an aquifer is packed in a test cylinder. The cylinder has a length of 120 cm…

A:

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: In confined or unconfined aquifers water levels in wells are above the top of the aquifer?

A: The confined aquifers are the aquifers which have saturated water and that are below the ground…

Q: Problem 2 Assume a clay liner with the following properties: thickness is 0.9 m, hydraulic…

A:

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

A:

Q: Which would you expect to be most permeable? consolidated sandstone unconsolidated sand well…

A: Darcy's law states that this rate is directly proportional to the drop in vertical elevation between…

Q: The two pressure heads of an aquifer 1100 m apart are 49 m and 27 m. The hydraulic conductivity of…

A:

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

A:

Q: Question 3. A DNAPLS substance was generated and released in a tire fire accident. A consulting firm…

A: The given data is shown below: Aquifer depth=1300 mSoil porosity=34%Hydraulic conductivity=41…

Q: For the figure shown below, if the area of the tank is 0.5 m² and hydraulic conductivity of sand is…

A: Given : Area of tank = 0.5 m2 Hydraulic conductivity of sand is 0.1 cm/sec This is a problem of…

Q: A layered, confined, nonleaky aquifer is shown below. Given bị = 7m, K1 %D 10-2 m/s, b2 = 20m, K2 =…

A:

Q: /True or False 1- It's possible for a reservoir with large amount of pore spaces to be completely…

A: Note- Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question…

Q: Water 3 m Clay 1 ki T+T2 n2 Clay 2 B. T2/2 k2 Sand Aquifer Shown in the image are two clay layers…

A:

Q: Explain how drawdowns predicted by the Hantush-Jacob (1955) leaky aquifer solution differ from…

A: Leaky aquifers When a leaky aquifer is pumped-up, the piezometric level of the geological formation…

Q: For an unconfined aquifer, the specific yield is 20%, specific retention is 15%, and permeability is…

A: Given data- An unconfined aquifer- Specific yield Sy= 20%, specific retention SR = 15%,…

Q: Water is stored in the reservoir of a trapezoidal dam with a vertical upstream height of 6 meters.…

A: Given data  Depth of trapezoidal dam = 6m  Pressure at lowest position (P) = 3.14 KPa Specific…

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

A: Solution; Given Data; Pimping Test on the aquifer of sandy-soil Thirckness=4 m & it is confined…

Q: Which of the following best decreases the hydraulic radius? O increasing the depth O decreasing the…

A: Hydraulic radius decreases best by increasing the depth  Hydraullic radius = cross sectional area of…

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

A: Given data: Thickness of aquifer=5.5m Bulk density=1.75 g/cm3 Porosity=0.35 Organic carbon=0.55%…

Q: In a laboratory test of an aquifer materia fully saturated sample of volume 5 liters was taken and…

A: Given:- V=5litres W=97N To find:- unit weight of water =9.79kN/m3 To find:- specific yield and…

Q: Assume a chemical solvent, which is denser than water is spilled into the reservoir. How many days…

A: Given:- The thickness of the silty sand stratum = 3.2 m  The hydraulic conductivity of the stratum =…

Q: In a constant head permeability test, if the discharge coming out of the sample is 0.35 cm³/s find…

A: Discharge Q=0.35 cm3/sLength L=30 cm,Area A=250 cm2Head loss per unit length i = 0.25Coefficient of…

Q: Show that at saturation the water content is: @=Yw ( Starting from Se = wGs 1 Ya Ys

A:

Q: In a permeability test with constant load in the laboratory, the following are given: L = 250 mm and…

A:

Q: In this model, which layers are confined aquifers?

A:

Q: A 2 m drawdown was observed in a confined aquifer. What would be the drawdown if the…

A: Answer  We know that discharge from confined aquifer is given by Q = 2πTSlogeRr Q = discharge…

Q: At 60 m below fresh water, what is the ratio of the pressure at this depth to normal atmospheric…

A:

Q: A falling-head permeability test was carried out on a clay soil of diameter 10 cm and length 15 cm.…

A: Given:- Diameter of soil sample (D) = 10 cm Length of sample (L) = 15 cm Head dropped from h1 = 68…

Q: An oil having viscosity 0.08 N-s/m², specific weight 8829 N/m³, density 900 kg/m³ flows at the rate…

A:

Q: When soil water potential in a sandy loam soil goes from -0.1 to -10 bars, the height of an…

A: Given soil water potential in a sandy loam soil goes from - 0.1 to - 10 bars. Height of an…

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…

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.