Erosion of a gully in duplex soils - Results of a long term photogrammetric monitoring program

Abstract

The development of a gully within an ephemeral stream channel was monitored over a 10 year period by using a direct contact measurement technique initially and then a photogrammetric technique. The latter was shown to have an accuracy of better than 0.05 m3 for each time of measurement. The volume of soil loss and gully headwall progression were very nearly linear with time, having values of 0.40 m3 yr-1 and 0.25 m yr-1 respectively.