Groundwater flows through an aquifer with a cross-sectional area of 1.0 × 104 m² and a length of 1500 m. Hydraulic heads are 300 m and 250 m at the groundwater entry and exit points in the aquifer, respectively. Groundwater discharges into a stream at the rate of 750 m³/day. Then the hydraulic conductivity of the aquifer is www c/day/

Groundwater flows through an aquifer with a cross-sectional area of 1.0 × 104 m² and a length of 1500 m. Hydraulic heads are 300 m and 250 m at the groundwater entry and exit points in the aquifer, respectively. Groundwater discharges into a stream at the rate of 750 m³/day. Then the hydraulic conductivity of the aquifer is www c/day/

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.8P

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A town is planning to develop a new water supply from an aquifer. Two observation wells installed 1000 ft apart have respective head of 300 ft and 295 ft above a common datum. Within the aquifer, hydraulic conductivity (Kn) 25 ft/day. The aquifer has a mean width (w) = 2 miles and thickness (b) = 200 ft. Estimate the volumetric flow %3D %3D %3D rate through the aquifer in cubic feet per day. Well 1 h= 300 ft 1000 ft Well 2 h = 295 ft AQUIFER 200 ft suturation 2 miles
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Hydrology engineering Q3. 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?
In a homogeneous unconfined aquifer of area 3.00 km², the water table was at an elevation of 102.00 m. After a natural recharge of volume 0.90 million cubic meter (Mm²), the water table rose to 103.20 m. After this recharge, ground water pumping took place and the water table dropped down to 101.020 m. The volume of ground water pumped after the natural recharge, expressed (in Mm² and round off to two decimal places), is
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…
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h₂ h2-h1 h₂ Q b=h Unconfined aquifer Ⓒ Steady flow h1 = 80ft h2 = 100ft r1 - 800 ft r2 = 1000 [L Pumping rate = 300 gpm Estimate hydraulic conductivity of the aquifer 1 gpm = 192.5 ft3/day
A confined aquifer has a thickness of 30m (m) and is fully penetrated by well where the aquifer is pumped at the rate of 500 litres per second. The groundwater thickness (H₁) is 50 m. The drawdown measured in two observation wells located at distance of 10 m and 100 m from the well are 7.5 m and 0.5m respectively. Determine the average hydraulic conductivity of the aquifer. At what distance from the well the drawdown is insignificant i.e. is zero (R).
Q2: A) At the beginning of a given day a reservoir has a surface area 30 Km². The inflow to the reservoir during the day was measured to be 80m/s and the reservoir outflow was measured as 15m/s. In addition, the day was dry and the seepage is 10% of the inflow. Assume the area of the reservoir does not change significantly by the end of the day. Determine the reservoir evaporation in mm/day where the reservoirs level is decreased 2 cm?
A well of diameter 15 cm pumps at a steady rate of 265 L/min. It is located 15.2 m from a lake shore that is straight. The well and the lake penetrate the same homogeneous isotropic confined aquifer of hydraulic conductivity 2 m/day. At the steady state the influence of a well pumping at the above rate on the aquifer is upto a distance of 50 m from the well. Determine the drop in water level in the well assuming that without the well pumping, the head at the well is essentially the same as the head in the lake