Gully erosion, a spectacular erosional landform in the hilly areas of southern China, poses an enormous threat to local sustainable economic development and ecological security. The depth of granite weathering mantle in-creases from north to south, which is consistent with the increase of gully density and accelerated soil loss. However, the spatial distribution of soil depth in gully areas remains unclear. Herein, soil depth was measured by field sampling investigation, and soil depth mapping was established using the Fuzzy c-means algorithm. To explore the relationship between soil depth and...
