Miguel F.Acevedo
ABSTRACTS
Assessing Pollutant Loading to Bayou
Chico, Florida by Integrating an Urban
Stormwater Runoff and Fate Model with GIS
In: Proceedings, Third International
Conference/Workshop
on Integrating GIS and Environmental Modeling, Santa Fe, NM,
January
21-26, 1996. Santa Barbara, CA: National Center for Geographic
Information
and Analysis. CD. 1995
Toar T. Schell, Miguel F. Acevedo, Fred C. Bogs, James Newell, Kenneth
L. Dickson, Institute of Applied Sciences, University of North Texas,
Denton
TX., and Foster L. Mayer Environmental Protection Agency, Gulf Breeze
Research
Laboratory, Gulf Breeze FL.
ABSTRACT
This paper discusses the integration of Geographic Information
Systems(GIS)
and EPA's Storm Water Management Model (SWMM) as part of a watershed
approach
to assessing the ecological health of Bayou Chico, which is a
sub-estuary
of Pensacola Bay. Bayou Chico is the receiving water body of small,
mostly
urbanized watershed located in southern Escambia County, Florida. Both
natural channel flow of precipitation and dry weather flow through a
managed
drainage system contribute to pollutant loading to the bayou. The
transport
and fate of pollutants are thus represented as water flow through these
systems. A GIS database and the use of remotely sensed satellite images
are combined to determine surface characteristics, storm drainage
systems,
area and slope of the watershed. These data layers are in turn linked
to
SWMM which mathematically represents these physical characteristics and
uses this information to determine both runoff and pollutant loading.
We
discuss data required for SWMM, and its acquisition and use in the GIS.
We emphasize the GIS-model linkage with special attention given to
model calibration techniques.
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