Tracer Study of Mixing and Transport in the Upper Hudson River with Multiple Dams
Publication: Journal of Environmental Engineering
Volume 130, Issue 12
Abstract
In October 2001, of was injected into the upper Hudson River, a modified natural channel with multiple dams, at Ft. Edward, N.Y. The tracer was monitored for 7 days as it moved downriver. The longitudinal evolution of the tracer distribution was used to estimate one-dimensional advection and dispersion along the river axis. Comparison of these results to tracer studies on channels without dams suggests that dams reduce longitudinal dispersion below the value expected in a natural channel with the same discharge. loss through air–water gas exchange along the river and at two dams ( combined height) was estimated by observing decay in peak concentration. Losses at dams (approximately 50% per dam) were dominant. The estimated gas exchange at dams was compared to a simple model adapted from those available in literature. Small amounts of tracer were trapped in a canal segment ( long) that parallels the river, where advection and dispersion were sharply reduced.
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Copyright © 2004 ASCE.
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Published online: Nov 15, 2004
Published in print: Dec 2004
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