scholarly journals Stochastic hydrogeological modelling workflow in a glacial sedimentary basin, southern Ontario

2020 ◽  
Author(s):  
N Benoit ◽  
D Marcotte ◽  
J W Molson ◽  
A F Bajc ◽  
H A J Russell
Keyword(s):  
Sedimentary Basin ◽  
Southern Ontario

Electromagnetic soundings in the sedimentary basin of southern Ontario—A case history

Geophysics ◽  
1983 ◽  
Vol 48 (3) ◽  
pp. 311-330 ◽  
Author(s):  
E. Gómez‐Trevino ◽  
R. N. Edwards
Keyword(s):  
Apparent Resistivity ◽  
Sedimentary Basin ◽  
Joint Inversion ◽  
Earth Model ◽  
Electrical Model ◽  
Southern Ontario ◽  
Number Of Layers ◽  
Electromagnetic Soundings ◽  
Minimum Number ◽  
The Individual

The results of electrical and electromagnetic (EM) soundings conducted in the sedimentary basin of southern Ontario are presented. The sounding sites are located strategically to take advantage of the dipping nature of the sediments, a progressive study being undertaken from shallow to deep sections. The vertical magnetic field transfer function, estimated with a pseudonoise source EM system, and conventional Schlumberger apparent resistivity are jointly inverted. For each site, the layered earth model containing the minimum number of layers is fitted to the data. The joint inversion enables up to eight distinct layers to be identified at some sites. The nonuniquenesses or ambiguities in each model, for example S (conductivity‐thickness product) equivalence of a deep thin conductive layer, are revealed through an eigensolution analysis. The intrinsic ambiguities of the models of the deeper sections are resolved by a systematic, progressive site‐to‐site correlation of electrical units across the basin. For example, the conductivity of a conductive unit is measurable when it is at a shallow depth. In a deeper section, if the unit appears as a thin layer, it is assigned this value of conductivity removing the S‐equivalence ambiguity. The individual inversions combined with the site‐to‐site correlation produce an overall electrical model of the basin consistent with the known geologic section.

The Numerical Analysis of Contaminant Migration from Sanitary Landfill Sites

1977 ◽  
Vol 12 (1) ◽  
pp. 233-255
Author(s):  
J.F. Sykes ◽  
A.J. Crutcher
Keyword(s):  
Contaminant Transport ◽  
Cross Section ◽  
Element Model ◽  
Sanitary Landfill ◽  
Saturated Porous Media ◽  
Two Dimensional ◽  
Contaminant Migration ◽  
Southern Ontario ◽  
Galerkin Finite Element ◽  
Chloride Concentrations

Abstract A two-dimensional Galerkin finite element model for flow and contaminant transport in variably saturated porous media is used to analyze the transport of chlorides from a sanitary landfill located in Southern Ontario. A representative cross-section is selected for the analysis. Predicted chloride concentrations are presented for the cross section at various horizon years.

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