Geoscience Reference
In-Depth Information
Figure 18.1
Illustrations of
. With permission from the Institute of Food and
Agricultural Sciences, Center for Aquatic Plants, University of Florida, Gainesville.
Phragmites australis
and
Typha
18.3 METHODS
Thirteen coastal wetland sites were selected from a group of 65 potential coastal locations to
support the EPA's wetland assessment efforts in western Lake Erie, Lake St. Clair, Lake Huron, and
Lake Michigan (Lopez and Edmonds, 2001). These sites were selected after visual inspection of
aerial photographs, topographic and National Wetland Inventory (NWI) maps, National Land Cover
Data (NLCD) data, input from local wetland experts, and review of published accounts at each
wetland (Lyon, 1979; Herdendorf et al., 1986; Herdendorf, 1987; Stuckey, 1989; Lyon and Greene,
1992). The study objectives required that each site (1) generally spanned the gradient of current
LGL landscape conditions, (2) consisted of emergent wetlands, and (3) included both open lake and
protected wetland systems. LC adjacent to the 13 selected study sites included active agriculture,
old-field agriculture, urban areas, and forest in varying amounts (Vogelmann et al., 2001).
18.3.1
Remote Sensor Data Acquisition and Processing
Airborne imagery data were collected over the Pointe Mouillee study area using both the
PROBE-1 hyperspectral data and the Airborne Data Acquisition and Registration system 5500
