It is shown that the gullies approach the equilibrium length after 8 years. The results show that sediment yield of gully erosion in these pine plantations is extremely high. The high sediment yield is explained by deep ploughing of the forest surface and the coincidence of intense storms. The results suggest that most of the eroded material is trapped where there are gentle footslopes while some proportion of fine sand, silt and clay are delivered to streams. The results of monitoring suggest that bank erosion is caused by a complex interaction of many processes, but seepage and overland flow from banks together with rainsplash ploy an important role in bank erosion.
Evidence suggests that channel flow has direct impact to scour the lower parts of the gully.
This study renders support to findings of some previous studies stating that seepage is a dominant process in gully development.