Main Title |
Evaluation of source term initial conditions for modeling leachate migration from landfills / |
Author |
Mulkey, Lee Alexander. ;
Donigian, A. S. ;
Allison, T. L. ;
Raju, C. S.
|
Other Authors |
|
CORP Author |
AQUA TERRA Consultants, Mountain View, CA. ;Computer Sciences Corp., Athens, GA.;Environmental Protection Agency, Athens, GA. |
Publisher |
U.S. Environmental Protection Agency, Environmental Research Laboratory, |
Year Published |
1992 |
Report Number |
EPA-68-03-6304 |
Stock Number |
PB93-131464 |
Subjects |
Sanitary landfills--Leaching--Computer simulation
|
Additional Subjects |
Earth fills ;
Source terms ;
Mathematical models ;
Leaching ;
Solid waste disposal ;
Water pollution ;
Environmental transport ;
Land disposal ;
Pollution regulations ;
Toxicity ;
Exposure ;
Alternatives ;
Hazardous materials ;
Steady state ;
Unsteady flow ;
Degradation ;
Sorption
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB93-131464 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
75 pages ; 28 cm |
Abstract |
Leachate migration modeling is a necessary part of conducting exposure assessments in the development of land disposal regulations for solid wastes. Development of toxicity characteristics to define leachate concentration levels that pose unacceptable risks to humans and the environment requires modeling studies for a wide range of leachate generation-migration scenarios. The study investigated the influence of five alternative modeling initial conditions on down-gradient ground water concentrations predicted by two models (MULTIMED and AT123D) and for four typical hazardous waste constituents. Differences between steady-state and transient conditions also were investigated. The alternative initial conditions studied were shown to be representative of typical leachate patterns reported from laboratory and field studies. The square wave pulse initial condition was found to be the most conservative representation of leachate generation for both models. Sorptive and degradation properties of chemicals strongly influence predictions, and for some chemicals, steady-state modeling and transient modeling of the same scenario produced significantly different results. |
Notes |
"EPA/600/R-92/233." Microfiche. |