Mountain-Lake Model
Consider the following site:
Build a simple groundwater model representing this system. Input is from recharge. Parallel flow boundaries on the top and bottom.
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Build grid
a. X, length = 20000, 100 cells
b. Y, length = 15000, 75 cells
c. Z, length = 500, 1 cell -
Properties
a. Top = 3200, bottom = 2700
b. K = 2 ft/day -
Recharge
a. 20 inches of rain per year
b. 15% reaches aquifer -
Lake
a. Specified head
b. Elevation = 3000 -
Save and run model
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Add a well
a. Permitted at 10 AFA (acre-ft/year)
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Explore
b. Pumping rate (bigger)
c. More wells
d. K value
e. Recharge
Solution
Click here to see calculation details:
Recharge:
• 20 inches of rain per year
• 15% reaches aquifer
• 20/12*0.15/365=0.0006849315 ft/day
Well:
• Permitted at 10 AFA (acre-ft/year)
• 10*43560/365 = 1193.4 ft^3/day