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

Geoenvironmental Disasters

Table 6 Showing FR values for slope classes

	Factor classes	No. of points	% of points	Class area	%of class area	Frequency ratio	Relative frequency
Slope	0–2	65,423.14	61.06	283,093	48.82	1.25	0.44
	2–4	34,133.81	31.85	217,715	37.54	0.84	0.30
	4–9	7585.291	7.07	59,650	10.28	0.68	0.24
	9–16	0	0	14,653	2.52	0	0
	16–43	0	0	4708	0.81	0	0
	Sum	107,142.2	100	579,819	100	2.78	1