Effective porosity of a carbonate aquifer with bacterial contamination: Walkerton, Ontario. Canada.

Citation

Material Information

Title:
Effective porosity of a carbonate aquifer with bacterial contamination: Walkerton, Ontario. Canada.
Series Title:
Journal of Hydrology
Creator:
Worthington, Stephen R. H.
Smart, C. Christopher
Ruland, Wi
f
Publisher:
Elsevier
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Conceptual Model ( local )
Carbonate Aquifer ( local )
Bacteria ( local )
Water Supply ( local )
Tracer Test ( local )
Effective Porosity ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
Preferential flow through solutionally enlarged fractures can be a significant influence on travel times and source area definition in carbonate aquifers. However, it has proven challenging to step beyond a conceptual model to implementing, parameterizing and testing an appropriate numerical model of preferential flow. Here both porous medium and preferential flow models are developed with respect to a deadly contamination of the municipal groundwater supply at Walkerton, Ontario, Canada. The preferential flow model is based on simple orthogonal fracture aperture and spacing. The models are parameterized from borehole, gamma, flow and video logs resulting in a two order of magnitude lower effective porosity for the preferential flow model. The observed hydraulic conductivity and effective porosity are used to predict groundwater travel times using a porous medium model. These model predictions are compared to a number of independent estimates of effective porosity, including three forced gradient tracer tests.
Original Version:
Journal of Hydrology, Vol. 464-465 (2012-09-25).

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

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