B.5. Floppy Disk and Demo Problem
307
The demo problem is designed to simulate a groundwater remediation
procedure. A confined aquifer between two rivers (Figure B.l) was poIlu ted
by the upstream river. In order to protect the downstream river, we must
remove the pollution from the upstream river and clean up the aquifer.
After the water in the upstream river is clean, we can pump out the polluted
water from the aquifer. In this situation, an efficient remediation project may
be found with the help of a model.
Before using MCB2D to solve a problem designed by the user, it is better
to do so me exercises to familiar with the input and output of the program.
In each exercise, the user is required to change a few input data, run the
pro gram and observe the simulation results. The following exercises are
suggested:
1. Use the data given in file DATAG to draw the geometry ofthe aquifer and
the zonation pattern. U se the data given in file DAT AB to find the boundary nodes and boundary conditions. Use the data given in file DATAO to
find the locations of observation wells and observation times. Use the data
given in file DA TA W to find the locations and rates of pumping wells.
2. Switch IHC, IST and IPR in file DAT AN to different values (IHC = 1, 2;
IST = 0, 1; IPR = 0, 1,2,3) and observe corresponding results.
3. Answer what is the minimum rate that the maximum concentration in all
observation wells will be less than 200 (mgjL) after 1000 days? (the dimension system is assumed to be meter, gram, and day.)
4. Move the pumping weIl to different locations and observe corresponding
results.
5. Assuming that the water level in the upstream river decreases from 105m
to 100m in the first 10 days and then keeps the same level, change file
DATAB to simulate this situation.
6. Change the values of parameters in file DAT AP and observe corresponding results.
7. Assuming that the extracted water will be treated on the ground and then
recharged into the aquifer by a weIl, the concentration of injection water
will be 100 (mgjL) and the recharge procedure will begin at t = 50 days,
modify the file DA TA W to simulate this procedure and observe corresponding results.
All input data files and simulation results of the demo problem are given
below.
307
The demo problem is designed to simulate a groundwater remediation
procedure. A confined aquifer between two rivers (Figure B.l) was poIlu ted
by the upstream river. In order to protect the downstream river, we must
remove the pollution from the upstream river and clean up the aquifer.
After the water in the upstream river is clean, we can pump out the polluted
water from the aquifer. In this situation, an efficient remediation project may
be found with the help of a model.
Before using MCB2D to solve a problem designed by the user, it is better
to do so me exercises to familiar with the input and output of the program.
In each exercise, the user is required to change a few input data, run the
pro gram and observe the simulation results. The following exercises are
suggested:
1. Use the data given in file DATAG to draw the geometry ofthe aquifer and
the zonation pattern. U se the data given in file DAT AB to find the boundary nodes and boundary conditions. Use the data given in file DATAO to
find the locations of observation wells and observation times. Use the data
given in file DA TA W to find the locations and rates of pumping wells.
2. Switch IHC, IST and IPR in file DAT AN to different values (IHC = 1, 2;
IST = 0, 1; IPR = 0, 1,2,3) and observe corresponding results.
3. Answer what is the minimum rate that the maximum concentration in all
observation wells will be less than 200 (mgjL) after 1000 days? (the dimension system is assumed to be meter, gram, and day.)
4. Move the pumping weIl to different locations and observe corresponding
results.
5. Assuming that the water level in the upstream river decreases from 105m
to 100m in the first 10 days and then keeps the same level, change file
DATAB to simulate this situation.
6. Change the values of parameters in file DAT AP and observe corresponding results.
7. Assuming that the extracted water will be treated on the ground and then
recharged into the aquifer by a weIl, the concentration of injection water
will be 100 (mgjL) and the recharge procedure will begin at t = 50 days,
modify the file DA TA W to simulate this procedure and observe corresponding results.
All input data files and simulation results of the demo problem are given
below.