To assess the soil erosion-prone areas in Calabar Metropolis, four levels of classes [very high-risk zone (4), high-risk zone (3), low-risk zone (2), and very low-risk zone (1)] were considered. The following steps were then taken to achieve the result;

a.     High-resolution Satellite image (Landsat) and DEM were downloaded from USGS. Both datasets are imported into the ArcMap environment, and clip operations are carried out to get the study area (Calabar Metropolis).

b.     Factor maps preparation. The DEM is used to extract the data for the slope and relief maps, while the Landsat image is used to extract the data for the Land Use/ Land Cover (LULC) map.

c.     Reclassification of factor maps (ie, slope, relief, and LULC maps) into the desired number of classes.

d.     Weight determination of these factor maps using the AHP decision matrix and weight calculation using the AHP calculator.

e.     Overlay Analysis is carried out. Here, after generating a vulnerability map for each of the parameters/factors, a weighted overlay is done to produce a single suitability map of the study area, combining all the parameters based on their weighted values as obtained from the previous step.

f.      The final soil erosion vulnerability map is produced and reclassified (where necessary).