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Environmental Health - Toxic Substances

Bibliography

U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Colorado Springs, Colorado, September 20-24, 1993, Water-Resources Investigations Report 94-4015

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Effects of Changes in Aquifer Properties on Simulated Fluid-Particle Pathlines, Cape Cod, Massachusetts

by

John P. Masterson (U.S. Geological Survey, Marlborough, Mass.) and Donald A. Walter (U.S. Geological Survey, Marlborough, Mass.)

Abstract

A ground-water-flow model is being developed by the U.S. Geological Survey (USGS) to estimate the paths of contaminants from the Massachusetts Military Reservation and, in particular, to determine whether these contaminants will affect public-supply wells, ponds, streams, and coastal embayments.

Preliminary model results determined by use of the regional-scale flow model of western Cape Cod developed by the USGS indicate that the pathlines of contaminants emanating from the infiltration beds of the Massachusetts Military Reservation sewage-treatment plant do not coincide with the known extent of the contaminant plume. Modifications to aquifer properties simulated by the model result in a similar head distribution and stream-discharge rates for the aquifer, yet markedly different contaminant pathlines. Therefore, calibration simply based on head and stream-discharge matching is insufficient for transport analysis. Accurate calibration might require the incorporation of contaminant information to use ground-water-flow models as tools for predicting plume migration.

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