|
<< Click to Display Table of Contents >> Model Output |
  
|
|
<< Click to Display Table of Contents >> Model Output |
|
After the model has been executed, the output for the model will be displayed.
Depth vs Concentration
The Depth vs Concentration chart can be displayed by selecting the Depth vs Concentration item for the Chart Type.
Output Listing
To display the output as a text listing that will show the calculated concentrations as numbers, click on the List tab. The peak at 208 years was found, even though the upper time limit specified by the user was 400 years. The peak concentration in the aquifer at the down gradient edge of the landfill is only about 2 mg/L, compared to the initial source concentration of 1000 mg/L. This peak is reached after 208 years. Thus with a working hydraulic trap some contaminant reaches the base aquifer despite the inward gradient, however for this diffusion coefficient and combination of parameters the impact is negligible.
POLLUTEv8
Version 8.00 Beta
Copyright (c) 2021
GAEA Technologies Ltd., R.K. Rowe and J.R. Booker
Case 5: Hydraulic trap - Finite mass source
THE DARCY VELOCITY (Flux) THROUGH THE LAYERS Va = -0.001 m/year
Layer Properties
Layer |
Thickness |
Number of Sublayers |
Coefficient of Hydrodynamic Dispersion |
Matrix Porosity |
Distributon Coefficient |
Dry Density |
Aquitard |
4 m |
4 |
0.01 m²/a |
0.4 |
0 cm³/g |
1.5 g/cm³ |
Boundary Conditions
Finite Mass Top Boundary
Initial Concentration = 1000 mg/L
Rate of Increase = 0 mg/L/yr
Volume of Leachate Collected = 0.3 m/a
Thickness of Waste = 0 m
Waste Density = 0 kg/m³
Proportion of Mass = 0
Volumetric Water Content = 0
Conversion Rate Half Life = 0 year
Reference Height of Leachate = 7.5 m
Fixed Outflow Bottom Boundary
Landfill Length = 200 m
Landfill Width = 1 m
Base Thickness = 1 m
Base Porosity = 0.35
Base Outflow Velocity = 3.8 m/a
Laplace Transform Parameters
TAU = 7 N = 20 SIG = 0 RNU = 2
Maximum Base Concentration Parameters
Depth to Search = 4 m
Lower Time Limit = 25 year
Upper Time Limit = 400 year
Base Concentration Accuracy = 0.01
Maximum Search Attempts = 25
Maximum Base Concentration and Time of Occurrence
Time |
Depth |
Concentration |
Preceeding Time |
Preceeding Concentration |
Exceeding Time |
Exceeding Concentration |
2.0828E+02 |
0.0000E+00 |
7.7427E-01 |
|
|
|
|
|
1.0000E+00 |
2.2363E+01 |
|
|
|
|
|
2.0000E+00 |
2.4529E+01 |
|
|
|
|
|
3.0000E+00 |
1.4300E+01 |
|
|
|
|
|
4.0000E+00 |
2.2199E+00 |
2.0800E+02 |
2.2199E+00 |
2.0857E+02 |
2.2198E+00 |
Number of Search Attempts = 8
NOTICE
Although this program has been tested and experience would indicate that it is accurate within the limits given by the assumptions of the theory used, we make no warranty as to workability of this software or any other licensed material. No warranties either expressed or implied (including warranties of fitness) shall apply. No responsibility is assumed for any errors, mistakes or misrepresentations that may occur from the use of this computer program. The user accepts full responsibility for assessing the validity and applicability of the results obtained with this program for any specific case.