Project 3 Hints

Landfill Site

Remedial Alternatives Alternative A - Do Nothing Alternative B - Impermeable Cap Alternative C - Cap and Confining Wall Alternative D - Cap, Slurry Wall and Drain Alternatives E, F and G – Your Alternatives

Part A Create the “working directory” C:\temp\Proj3a Download the Vista1.gwv.zip file (from class webpage) Un-Zip the file to get the file Vista1.gwv Place the file in the working directory Open the model Vista1 Run the model (steady state)

Part a

Part B Create a new “working directory” C:\temp\Proj3b Keep a separate working directory for each part, so you can back up if you make a mistake Save (or copy) the file Vista1.gwv from C:\temp\Proj3a to Select MODELS – PATHS TO MODELS Set working directory to:

Part b - Transient Model Setup In Part B: Convert the model to a transient model with 1 stress period

Stress period Types Select: Stress Period Types  Set all to transient Set up the Stress periods Stress period length = 972,000,000 seconds (= 30.82 years) 20 time steps Time step multiplier of 1.5

Specific Yield Set specific yield = 0.28

Part b - Initial Heads Select: Model  MODFLOW  Package Options  Initial Heads tab Select: Initial Head Location: Read Heads Directly from Binary Head Save File Browse Select: *.hds file from Part A MAKE SURE THE Part A HDS FILE IS IN A DIFFERENT FOLDER FROM THE PART B FILES!

Part B – Impermeable Cap Set recharge over cap area to 0

Recharge

Part C – Confining Wall Use a “Wall” BC – set K ~0

Confining Wall R30 R45 C15 C35 Landfill Wall

Part d - Drains Note

Part d - Drains Wall C15 C35 Drain R30 Landfill R45