Three wells are arranged as depicted below with B located on a cartesian coordinate system, in meters, at the origin coordinate Well B (0,0). Well A is located at (50,100), and Well C at (125,60) Groundwater energy surface elevations are measured as follows: Well A | 242 meters, Well B | 240 meters, and Well C | 243 meters (meters above mean sea level). The graphic below is not drawn to scale. A C B <<<>>>EAST Plot the well locations to scale on grid paper using the cartesian coordinates provided. Provide the following: a) Draw an arrow on your well map as your estimate of flow direction based on the methods presented in class. Be sure to justify your answer with any annotations you need to. Label all lines you present on your drawing. b) Provide your calculated estimate of groundwater gradient along the path of flow direction from information you derive on part a). c) Using your answers for a) and b) above, calculate specific discharge, q, using Darcy's law, assuming a hydraulic conductivity of 0.008 cm/sec. d) Calculate the advective velocity of a conservative solute traveling with the groundwater, using effective porosity of 0.35. Present your answer in meters/year. e) Calculate the contaminant velocity from the advective velocity you provided in d) above, assuming a retardation factor of 2.5. Also provide your answer in meters/year. It is important you provide a carefully scaled drawing to accurately provide your flow direction and gradient estimates faithful to the data provided.
Three wells are arranged as depicted below with B located on a cartesian coordinate system, in meters, at the origin coordinate Well B (0,0). Well A is located at (50,100), and Well C at (125,60) Groundwater energy surface elevations are measured as follows: Well A | 242 meters, Well B | 240 meters, and Well C | 243 meters (meters above mean sea level). The graphic below is not drawn to scale.
A
C
B
<<<<WEST ^NORTH^ >>>>EAST
Plot the well locations to scale on grid paper using the cartesian coordinates provided. Provide the following:
a) Draw an arrow on your well map as your estimate of flow direction based on the methods presented in class. Be sure to justify your answer with any annotations you need to. Label all lines you present on your drawing.
b) Provide your calculated estimate of groundwater gradient along the path of flow direction from information you derive on part a).
c) Using your answers for a) and b) above, calculate specific discharge, q, using Darcy's law, assuming a hydraulic conductivity of 0.008 cm/sec.
d) Calculate the advective velocity of a conservative solute traveling with the groundwater, using effective porosity of 0.35. Present your answer in meters/year.
e) Calculate the contaminant velocity from the advective velocity you provided in d) above, assuming a retardation factor of 2.5. Also provide your answer in meters/year.
It is important you provide a carefully scaled drawing to accurately provide your flow direction and gradient estimates faithful to the data provided.
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 1 images
