Record Display for the EPA National Library CatalogRECORD NUMBER: 6 OF 18
|Main Title||Examination of Scale-Dependent Dispersion Coefficients.|
|Author||Molz, F. J. ; Gueven, O. ; Melville, J. G. ;|
|CORP Author||Auburn Univ., AL. Dept. of Civil Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK.|
|Report Number||EPA-R-810704; EPA/600/J-83/302;|
|Additional Subjects||Dispersing ; Ground water ; Aquifers ; Solutes ; Waterflow ; Advection ; Observation wells ; Thickness ; Mathematical models ; Theorems ; Elevation ; Hydraulic conductivity ; Reprints ;|
Many hydrologists have observed that dispersion coefficients, when measured in the field, turn out to be scale-dependent. Recently, Guven, et al., (1983) presented a study which contains a basis for understanding the phenomenon of scale-dependent dispersion within a deterministic framework. The results of that study are used as a basis for defining a scale-dependent macro-dispersion coefficient for unidirectional flow in a stratified aquifer. The study and previous studies show that the primary physical mechanism that causes spreading of a solute near the source is different advection rates at different elevations in the aquifer.