The two pressure heads of an aquifer 1100 m apart are 49 m and 27 m. The hydraulic conductivity of the soil is 67 m/day with a porosity of 0.30. Calculate the time taken by the water to move from one head to another.
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- The pressure heads of an aquifer at 2000 m are 55.5 m and 36 m. The hydraulic conductivity of the aquifer is 76 m/ day and it's porosity is 0.27. calculate the time taken by the water to reach one head from another.The pressure heads of an aquifer at a distance of 2000m are 55.5m and 36m .The hydraulic conductivity of the aquifer is 76m/day and it's porosity is 0.27 .Calculate the time taken by the water to reach one head from another. Answer fast pleaseIn a confined aquifer, a 50-cm diameter well fully penetrates the aquifer. The hydraulic conductivity of the aquifer was approximately 0.8 m/day. Originally the piezometric head was 300 m above the top of the aquifer, which is 30 m. thick. If 0.8 m³ / min. is pumped from the well, what should be the depth of water in the well? What will the height of the piezometric head be ( above the top of the aquifer ) at a distance of 50 m. from the well? Assume the radius of influence to be 1000 ft.
- A confined aquifer is recharged by a continuous supply of water from the certain source. The average thickness of the aquifer was determined to be 25 m and the average width is 4 km. The hydraulic conductivity of the aquifer was obtained at 40 m/day and its void ratio is 0.3333. The piezometer heads in two wells 1.325 km apart are 65 meters and 60 meters from a common reference datum. Determine the rate of flow in cubic meters per day.A aquifer of an medium to coarse grained sand aquifer. It is 12.19 thick and 1.61 km wide. This aquifer is covered by a confining unit of Quaternary clay deposit about 13.72 m thick beginning from the land surface. The difference in the hydraulic head between two observation wells 1.524 m apart is 3.05 m. The hydraulic conductivity of the aquifer is 20.44 m/d. What is the quantity of the ground water passing through a cross-section of this aquifer?A confined aquifer has a source of recharge as shown in the figure. The hydraulic conductivityof the aquifer is 35 m/day with porosity of 25%. The piezometric head surface in the twoobservation wells 1000 m apart are at elevation 75 m and 65 m, respectively from the commondatum. The aquifer has an average thickness of 4 m and an average width of 4 km.a. Calculate the rate of flow of water through the aquifer in cubic meters per day.b. Calculate the seepage velocity in meters per day.c. Calculate the time of travel from the head of aquifer to a point 4 km downstream in days.
- Solve for the ratio of equivalent hydraulic conductivity with the following given: h1 = 2 m h2 = 2.5 m h3 = 1.8 m h4 = 0.9 m k1 = 1.5E-3 cm/sec k2 = 2.2E-4 cm/sec k3 = 1.6E-4 cm/sec k4 = 4.0E-4 cm/sec What is the equivalent coefficient of permeability if the water flows perpendicular to the layer of soil (KeqV) in cm/sec?Tacarigua aquifer in Trinidad is a medium to coarse grained sand aquifer. It is 12.19 thick and 1.61 km wide. This aquifer is covered by a confining unit of Quaternary clay deposit about 13.72 m thick beginning from the land surface. The difference in the hydraulic head between two observation wells 1.524 m apart is 3.05 m. The hydraulic conductivity of the aquifer is 20.44 m/d. What is the quantity of the ground water passing through a cross-section of this aquifer?Solve for the ratio of equivalent hydraulic conductivity with the following given: h1 = 2 m h2 = 2.5 m h3 = 1.8 m h4 = 0.9 m k1 = 1.5E-3 cm/sec k2 = 2.2E-4 cm/sec k3 = 1.6E-4 cm/sec k4 = 4.0E-4 cm/sec What is the equivalent coefficient of permeability if the water flows parallel to the layer of soil (KeqH) in cm/sec?
- 29.A confined aquifer 25.0m thick has two monitoring wells spaced 400m apart along the direction of ground water flow. The difference in water level in the wells is 3.0 m. The hydraulic conductivity is 40 m/day.The rate of flow per meter of distance perpendicular to the flow would be:An confined aquifer has a thickness of 30m. a fully penetrating 20cm diameter well in this aquifer is pumped at a rate of 35 lit/s. the drawdown measured in two observation well 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?2. A confined aquifer is recharged by a continuous supply of water from the certain source. The average thickness of the aquifer was determined to be 25 m and the average width is 4 km. The hydraulic conductivity of the aquifer was obtained at 40 m/day and its void ratio is 0.3333. The piezometer heads in two wells 1.325 km apart are 65 meters and 60 meters from a common reference datum. Determine the rate of flow in cubic meters per day. Determine: •compute the rate of flow through the aquifer in m3/day •compute the seepage velocity in m/day •compute the time of travel from the head of the aquifer to a point 8 km downstream in days
