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CONTRIBUTIONS OF TRACE METALS VIA ATMOSPHERIC DEPOSITION TO SANTA MONICA BAY AND THE SANTA MONICA BAY WATERSHED
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Pp. 222-222 in Total Maximum Daily Load (TMDL) Environmental Regulations–II Proceedings of the 8-12 November 2003 Conference (Albuquerque, New Mexico USA), Publication Date 8 November 2003. .(doi:10.13031/2013.15562)
Authors: K. Schiff and K. Stolzenbach
Keywords: Atmospheric deposition, Trace metals, Santa Monica Bay, Load allocation
Atmospheric deposition is a largely unmonitored, but potentially large source of pollutants to
aquatic ecosystems and their surrounding watersheds. The problem is further exacerbated in
urban environments where the sources of pollutants to the atmosphere are numerous and the
washoff of these contaminants once they deposit are enhanced due to imperviousness. The goal
of this study was to estimate the deposition of trace metals to Santa Monica Bay and its
watershed on varying temporal and spatial scales. Trace metals are responsible for numerous
impaired waterbodies throughout the southern California region. Since atmospheric deposition
represented a potentially important load, this study provided the opportunity to account for this
source in total maximum daily load (TMDL) development. Trace metal loads from atmospheric
deposition were estimated using a combination of aerosol sampling, water sampling and
atmospheric transport and fate modeling.