Environmental Engineering Reference
In-Depth Information
Fig. 8.6
Calibrated and observed flow discharge at EG 8.5
Fig. 8.7
Calibrated and observed flow discharge at Franch's Run
at the Upper Eau Galle River watershed and at one sub-watershed at an adjacent
watershed (French Creek).
The land use and soil type maps are shown in Fig. 8.5 a and b, respectively. The
land uses includes residential, commercial, forest, grass, wetland, row crop, and
open water. The predominate land uses in the watershed are pasture (8, light green)
and row crops (12, beige). There is a moderate amount of forest (6, dark green),
with limited residential and commercial use. The predominant soil type is silty
loam.
The hydrologic model of GSSHA was developed and calibrated to observed
flows at the USGS gauge (EG 8.5 in Fig. 8.4 ) because this site was believed to
provide the most reliable data for model calibration. Flows from the other sites are
considered less reliable. Results of the model calibration during the period June
through October 2002 are shown in Fig. 8.6 . The mean absolute error (MAE) of
 
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