The aquifers wherein the groundwater flows has a cross-sectional area of 10,000 m^2 and a length of 1,500 m. Hydraulic heads are 250 m and 300 m at the groundwater exit and entry points in the aquifer, respectively. If the groundwater discharges into a stream is at the rate of 50 m^3/month: a. What is the Darcy's velocity per day? b. Determine the hydraulic gradient? c. Determine the hydraulic conductivity per day?

Question 48

Q 1 .An aquifer has following different formations, their thickness and Hydraulic conductivity are given below. Assume that each formation is isotropic and homogeneous. Compute both the equivalent horizontal and vertical hydraulic conductivities Formation Thickness (m) Hydraulic Conductivity ( m/day) 1 24 2 8. 12 3 15 4 9 5 6 10 10 8 20 1 10 10 18 11 8. 29 12 29 13 6. 14 3. 16 15 10 26 16 4 9. 17 4. 18 4. 1 19 29 20 25 21 8 12 22 4 23 23 18 24 7. 30 25 8 29 26 6. 28 27 28 28 9. 14 29 4 14 30 2 31 8. 4 32 1 33 3. 19 34 2 13

A confined aquifer is 18.5 m thick. The hydraulic head drops 2.99 m between two wellsthat are 823 m apart. If the hydraulic conductivity of the aquifer is 4.35 m/d, how many cubicmeters of water are moving through the aquifer per unit width?

The US Geological Survey wants to know how long it will take for a contaminant in an aquifer to research a monitoring well. They will first need to determine the velocity at which the groundwater is traveling. Given that the hydraulic gradient is 0.00115, hydraulic conductivity is 1000m/d, and a porosity is 0.23 find: The Darcy velocity The actual linear velocity.

FUNDAMENTALS OF GEOTECHNICAL ANALYSIS A fine sand sample is placed into a permeameter that supplies a constant head of 100 cm ofwater. Water flows through the sample area of 20 cm2, and its length of 25 cm. If 850 ml of water is collected in 80 seconds, what is the hydraulic conductivity, kHYD in cm/s? a) Calculate the flow rate in cm3/s if the head is increased to 140 cm.

Question 3 A certain 20 m thick sandy confined aquifer has a permeability of 2.4 x 102 cm/s and a void ratio of 0.91. Groundwater is flowing through this aquifer with a hydraulic gradient of 0.0065. Determine the time (in hours) required for water to travel 0.5 km through this aquifer.

11. A channel runs almost parallel to a river as shown in the figure. The water level in the river has an elevation of 36 m. and the elevation of the channel is 33 m. The river and channel are 600 m apart and a previous formation of the average thickness of 9 m and hydraulic conductivity of 0.80 m/hr joints them together. Compute the hydraulic gradient Compute the rate of seepage flow from the river to the channel per meter width in liters per day. If the seepage velocity is 0.048 m/day, compute the void ratio of the previous medium.

Calculate the effective hydraulic conductivity for flow parallel and perpendicular to layering. Please show and explain the difference in values.

1. A piezometer point is 35 m above mean sea level. The fluid pressure in the aquifer at that point is 6.70 x 10E+6 N/m2. The aquifer has fresh water at a temperature of 15 degree C. a) What is the point water pressure head? b) What is the total head?