Operational Plan for the Restoration of Diadromous Fishes to the ...

Figure 5. Effect of stream width prediction error on estimation errors of predicted
habitat.
Proportional Difference in Habitat ((Field-
Model/Field))
Proportional Difference in Width verses Proportional
Differences in Habitat
R 2 = 0.7537
0
-3 -2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5
-0.5
Table 1 presents the best current information on the amount of habitat in the
Penobscot basin based on both the GIS model and contemporary field surveys.
Field survey data covered only a small portion of the basin; therefore, we used the
model data output as the primary source, and replaced modeled data with survey
data in reaches where field survey data were available. This resulted in a data set
comprised of modeled and observed data. The data are aggregated at the Dam,
Management, and HUC 10 levels. Other aggregations are possible using the
geodatabase.
Table 1. Penobscot Basin Atlantic Salmon Habitat Data: GIS-Model Results and
Field Survey Combined
Habitat in units (100 m^2)
Model
(surveyed
Management
reaches
Total
Dam Reach Reach HUC 10 NAME
subtracted) Survey Habitat
Headwaters
East Branch Penobscot
to Weldon East Branch River (2) 5173 6967 12140
Headwaters
East Branch Penobscot
to Weldon
Headwaters
East Branch River (3) 8244 8244
to Weldon
Headwaters
East Branch Grand Lake Matagamon 5740 5740
to Weldon Seboeis River Seboeis River 6108 7442 13550
Headwaters Wassataquoik East Branch Penobscot
to Weldon Stream
River (3) 4537 4855 9393
Total Habitat 29802 19264 49067
Weldon to
West Mattawamkeag Mattawamkeag River (1) 2115 2480 4595
PRFP Page 144
1.5
1
0.5
-1
-1.5
-2
-2.5
Proportional Difference in Width ((Field-Model/Field))
-3