is composed of coarse sand having a bulk density of 2 g/cm3, K of 0.1 cm/sec, porosity of 0.25 and organic content of 0.5%.+ radius of influence of this well can be taken as 3,000 m. What is the steady state drawdown of the well, if the average water use by the factory is 360 L/min. b = 12m S = 360L/m do I have this correct? Ss =

is composed of coarse sand having a bulk density of 2 g/cm3, K of 0.1 cm/sec, porosity of 0.25 and organic content of 0.5%.+ radius of influence of this well can be taken as 3,000 m. What is the steady state drawdown of the well, if the average water use by the factory is 360 L/min. b = 12m S = 360L/m do I have this correct? Ss =

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.22P: Refer to Figure 7.24. The following data were collected during the field permeability measurement of...

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A well pumping test was carried out to determine the bulk permeability of a confined aquifer. The aquifer was overlain by a clay layer 4m thick, the depth of the aquifer was 20m, and the initial piezometric level in the aquifer was 2m below ground level. After a period of pumping when steady state conditions had been reached, the following observations were made:pumped flowrate q=1.637 li/swell radius=0.1mdrawdown just outside well = 2mdrawdown in piezometer at 100m distance from well = 0.2m.Determine the bulk permeability of the aquifer in m/s . Use the format for your answer 1.111 x 10^(-4).
The owner of a small factory has installed a new well to supply process water. The well is 0.3 m in diameter and is fully screened for the entire 12 m depth of the aquifer, which is composed of coarse sand having a bulk density of 2 g/cm3, K of 0.1 cm/sec, porosity of 0.25 and organic content of 0.5%. The radius of influence of this well can be taken as 3,000 m. What is the steady state drawdown of the well, if the average water use by the factory is 360 L/min. A plume of TCE-contaminated groundwater lies 800 m from the well. How fast is the TCE plume moving towards the well? Neglect any movement that may be due to regional groundwater flow and consider only the influence of well pumping at hydraulic steady state. Please only use the equation I have provided to answer this question. Thank you
The hydraulic conductivity of a homogeneous gravelly aquifer is 3 x 10-1 cm/sec. The hydraulic gradient (groundwater surface slope) of the phreatic (water table) aquifer is 0.01 and the aquifer's effective porosity is 0.25. Calculate the following two parameters and provide the answer to question b) in the space provided (numerical answer only, no units or any). Calculate the specific discharge that represents flow conditions of the aquifer in cm/sec. Also Calculate the approximate average velocity of a conservative solute dissolved in this aquifer, calculated to units of cm/sec (enter numerical answer without stating units).
Charyeong wants to determine the permeability of an aquifer. The aquifer has a 300 mm diameter test well that penetrates 27 m. below the static water table. After 24 hours of pumping at 61 liters/sec, the water level in an observation well 93.53 m. from the test well was lowered to 24.83 m. and the other observation well at 33.3 m. from the test well, was lowered to 23.02 m. Determine the coefficient of permeability of the aquifer in m/day.
A pumping well was drilled penetrating straight into an unconfined aquifer withthe thickness of 42 m. The distance of pumping well with first extraction welland second extraction well are 20 and 180 m, respectively. Meanwhile, thedrawdown for the first extraction well is 4.5 m, and the second extraction wellis 1.5 m. The constant pumping rate has been set at 0.09 m3/s. Sketch the cross section of unconfined aquifer system and label the values. ? .
The following data relate to a pump-out test: Diameter of well = 24 cm; Thickness of confined aquifer = 27 m; Radius of circle of influence = 333 m; Draw down during the test = 4.5 m; Discharge = 0.9 m^3/s.What is the permeability of the aquifer in mm/s? Choices: a. 2.15 x 10^-2 b. 4.5 x 10^-1 c. 93 X 10^-1 d. 1.6 X 10^-1
A 30 cm diameter well penetrates vertically through an aquifer to an impermeable stratum which is located 18.0m below the static water table. After a long period of pumping at rate of 1.0m^3/min, the drawdown in test holes 14m and 40m from the pumped well is found to be 2.62m and 1.50m respectively. What is the coefficient of permeability of the aquifer? Express in meters per day. What is its transmissibility? Express in cubic meters per day per meter. What is the drawdown in the pumped well?
Could you help me answer the following question? Thank you A fully penetrating pumping well extracts groundwater from a confined aquifer with a pumping rate of 750 m3/day. The hydraulic conductivity of the aquifer is 10 m/day and the saturated thickness is 50 m. The drawdown of the aquifer from this pumping well is insignificant at a distance of 1000 m from the pumping well. At what distance from the pumping well is the drawdown 10 cm? Assume the hydraulic gradient is negligible in the local area. Transmissivity T = 1746.76 gal/min/ft Hydraulic conductivity = 11.645 gal/min/ft2 Storativity = 0.809 The drawdown on Jenny’s Well by the end of August. =0.6902 ft. Observation well situated is 69.7 ft away from the pumping well (which is pumping at the rate of 305 gal/min). The aquifer is confined, and the depth has been measured from well logs and is 150 ft. The data for time (t) and drawdown (s) is given below: t (min) s (ft) 0.072 0.003 0.105 0.006 0.155 0.012…
Qsn. an area of 200 hectare, water table drops by 4m. If the porosity is 0.35 and the specific retention is 0.15, change in volume of storage in the aquifer isDon't post wrong answer again, I will dislike , if not sure allow other experts to do it
This is for hydrology. How would I calulate the time it would take for the plume to reach the next well in it's path? Plume is moving in a southeast direction with with the next well at a distance of 61.2m away with a hydraulic gradient of 0.15m between the two wells. Here is the other information I have. Thank You A confined aquifer with the top of the aquifer about 13.5 m below the surface. The aquifer is 5.5 m thick and is bounded by impervious rock below (forming the datum for the hydraulic head measurements) and a clay aquitard above. Analysis of the aquifer material reveals a bulk density of 1.75 g/cm3, porosity of 0.35 and 0.55% organic carbon. After a pumping test, you calculate that the transmissivity of the aquifer is 0.00025 m2/s and the storativity is 0.000055. What monitoring well(s) would you next expect to see toluene found in and in approximately how long?
Compute the stock tank oil initially in place (STOIIP) for a reservoir with the following properties : Area = 40 arces, average porosity = 18%, initial water saturation = 25%, formation volume factor = 1.15bbl/STB and average net pay thickness = 18 ft. what s the recoverable oil in the field assuming recovery factor of 32%?
25. Situation 9 - An irrigation canal with trapezoidal cross-section has the following dimensions: bottom width = 2.50 m., depth of water = 0.90 m., side slope = 1.5H to 1V, slope of the canal bed = 0.001, coefficient of roughness = 0.025. The canal will serve clay-loam Riverland for which the duty of water per hectare is 3 liters/sec. Using Manning’s formula: a. Determine the hydraulic radius of the canal, in meters. Round off to three decimal places. b. Determine the velocity of the water in m/s. Round off to three decimal places. c. Determine the number of hectares served by the irrigation canal. Round off to the nearest whole number.