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Table 9 Showing FR values for TWI classes

From: GIS-based gully erosion susceptibility modeling, adapting bivariate statistical method and AHP approach in Gombe town and environs Northeast Nigeria

  factor classes No. of points % of points class area % of class area Frequency ratio Relative frequency
TWI <  7.0 36,030.13 33.62 250,191 43.14 0.77 0.14
7.0–8.5 38,874.62 36.28 213,435 36.81 0.98 0.18
8.5–10.6 15,170.58 14.15 79,075 13.63 1.03 0.19
> 10.6 17,066.91 15.92 37,118 6.40 2.48 0.47
Sum 107,142.2 100 579,819 100 5.29 1