Physical Barrier to Reduce WP Mortalities of Foraging Waterfowl
Publication: Journal of Environmental Engineering
Volume 126, Issue 2
Abstract
White phosphorus (WP) has been identified as the cause of mortality to certain species of waterfowl at Eagle River Flats, a tidal marsh in Alaska, used as an ordnance impact area by the U.S. Army. A blend of calcium bentonite/organo clays, gravel, and binding polymers was tested for effectiveness as a barrier to reduce duck foraging and mortality. Following the application of the barrier to one of two contaminated ponds, we observed greater duck foraging and higher mortality in the untreated pond and no mortality in the treated pond after a year of tidal inundations and ice effects. Emergent vegetation recovered within a year of treatment. WP levels in the barrier were less than the method limit of detection, indicating no migration of WP into the material. Barrier thickness remained relatively stable over a period of 4 years, and vegetation was found to be important in stabilizing the barrier material.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 126 • Issue 2 • February 2000
Pages: 182 - 187
History
Received: Apr 15, 1998
Published online: Feb 1, 2000
Published in print: Feb 2000
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