Routing: Fraction File

The fraction file is gridded information about the fraction of each grid cell that flows into the basin being routed. This allows the user to more accurately define the basin area, since each cell can contribute more or less than 100% of their runoff and baseflow components to the basin. An example of a fraction file is shown below:

ncols           22
nrows           20
xllcorner       -97.000
yllcorner       38.000
cellsize        0.50
NODATA_value    0.00
0.00 0.00 0.00 0.11 0.38 0.63 0.65 0.33 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.78 1.00 1.00 1.00 0.83 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.64 1.00 1.00 1.00 1.00 0.87 0.35 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.83 1.00 1.00 1.00 1.00 1.00 0.93 0.73 0.90 0.64 0.39 0.49 0.44 0.33 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.90 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.91 0.00 0.00 0.00 0.00 0.00 0.00
1.00 0.99 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.75 0.00 0.00 0.00 0.00 0.00 0.00
0.52 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.29 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.57 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.98 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.57 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.73 0.21 0.40 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.26 0.82 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.56 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.41 0.99 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.82 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.34 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.84 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.57 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.96 0.15 0.00 0.28 0.28
0.00 0.00 0.00 0.00 0.00 0.48 0.97 0.99 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.88 0.83 0.65 0.43
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.53 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.91 0.99 0.65 0.00 0.00
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.13 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.42 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.93 1.00 1.00 1.00 1.00 1.00 1.00 0.42 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.52 0.86 1.00 1.00 0.87 0.56 0.30 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.31 0.57 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00