Catchment area (A ; km2); maximum catchment
length (HL ; km); catchment perimeter (Pe ; km); lemniscate
ratio (LR ); compactness coefficient (CC ); form factor
(FF ); height difference between the outlet and the highest point
(HDC ; km); relief ratio (RR ); hypsometric integral
(HI ). ns , not significant; **P < 0.01
TABLE 2 Land use/cover around the gully heads in 1957, 1972,
and 2005