Remedial Alternatives for Landfill Site Management

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

–

C:\temp\Proj3b

•

Select

–

MODELS – PATHS TO MODELS

•

Set working directory to:

C:\temp\Proj3b

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

Wall

Part d - Drains

Part d - Drains

Landfill

Wall

Drain

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In this project, you will explore various remedial alternatives for managing a landfill site, including options like impermeable caps, confining walls, and more. Step-by-step instructions are provided for setting up models and conducting analyses to assess the effectiveness of different approaches. Dive into environmental engineering solutions for sustainable waste management practices.

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Project 3 Hints

Landfill Site Landfill

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 C:\temp\Proj3b Select MODELS PATHS TO MODELS Set working directory to: C:\temp\Proj3b

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!