Synthesis of the Geotechnical Properties of Soils from some Gully Erosion Sites in Nigeria

Gully erosion is a serious geohazard in Nigeria and has attracted the attention of many researchers. This study synthesizes data from 51 publications across the country, analysing particle size distribution, compaction parameters, Atterberg limits, hydraulic conductivity, and shear strength properties of soils from gully erosion sites. The findings reveal that soils at Nigerian gully erosion sites are predominantly sandy, with high erodibility due to an average sand content of 77% and low clay content of about 15%. Although compaction parameters and Atterberg limits suggest moderate stability, low cohesion and hydraulic conductivity increase vulnerability to runoff and detachment. Targeted measures such as vegetation, geotextiles, and slope stabilisation are encouraged to reduce erosion and support sustainable land management in the hotspot zones.