The Impact of US Biofuels Policy on Agricultural Production and Nitrogen Loads in Alabama
Table 2
Statistical summary of the SUFI-2 hydrological calibration procedure.
Gauge station
Calibration
Period
-factor
-factor
NSE
Pbias
RSR
USGS 03584600
Jan-2004/Dec-2007
0.67
0.82
0.84
0.52
35.78%
0.70
USGS 03588500
Jan-2001/Dec-2005
0.78
0.99
0.69
0.68
−6.91%
0.57
USGS 0357479650
Jan-1999/Dec-2004
0.52
0.67
0.62
0.54
−21.58%
0.68
USGS 03574500
Jan-1991/Dec-2000
0.63
0.88
0.71
0.57
20.93%
0.66
USGS 03586500
Jan-1991/Dec-2000
0.54
0.66
0.90
0.87
−16.61%
0.35
Validation
USGS 03584600
Jan-2008/Dec-2010
0.39
0.58
0.53
0.49
13.54%
0.72
USGS 03588500
Jan-2006/Dec-2010
0.65
0.80
0.87
0.84
12.82%
0.40
USGS 0357479650
Jan-2005/Dec-2010
0.35
0.68
0.78
0.18
−83.94%
0.90
USGS 03574500
Jan-2001/Dec-2010
0.41
0.8
0.59
0.51
4.03%
0.70
USGS 03586500
Jan-2001/Dec-2010
0.82
0.81
0.83
0.80
−16.75%
0.45
USGS 03584600: Elk River at Prospect, TN; USGS 03588500: Shoal Creek at Iron City, TN; USGS 0357479650: Hester Creek near Plevna, AL; USGS 03574500: Paint Rock River near Woodville, AL; USGS 03586500: Big Nance Creek at Courtland, AL. NSE: Nash-Sutcliffe efficiency coefficient; Pbias: percent bias; RSR: ratio of the root mean square error to the standard deviation of measured data.