is a significant land degradation process and a source of increased sediment load to rivers (Wasson et al.
Soil and gully erosion
may affect an entire watershed.
The Wilderness experience will be further diminished by seeing washed-out trails, gully erosion
, large areas of bare ground, and litter.
Almost half (47 per cent) the grazing land in Great Barrier Reef catchments is managed using best management practice systems for streambank erosion, 28 per cent for erosion from pastures and nearly a quarter (24 per cent) for gully erosion
, Mr Hunt said.
Because it is in the top layers, sediment derived from shallow (hillslope) erosion will register high concentrations of radioactivity, whereas sediment from deeper gully erosion
or the erosion of subsurface channel bank material will have little.
DeRose RC, Gomez B, Marden M, Trustrum NA (1998) Gully erosion
in Mangatu Forest, New Zealand, estimated from digital elevation models.
Their findings suggest that, on average, tillage in areas prone to ephemeral gully erosion
can produce significantly higher soil erosion rates compared to those same regions under no-till management practices.
Mr Sanders said vehicles driving illegally in environmentally sensitive parts of the forest lead to a variety of environmental problems, ranging from water course pollution on salmonid spawning streams to gully erosion
on footpaths and bridleways.
Although our understanding has in-creased greatly over the past decades, there are still some substantial gaps, including such processes as stream bank and gully erosion
, transport and deposition processes, effects of sediment on biotic integrity, the role of dust in climate change, etc.
The Southwest Center for Biological Diversity reported that the Kern River system in the southern Sierra Nevada had been heavily overgrazed for more than 150 years, damaging 80 percent of the Kern Plateau with gully erosion
and has reduced habitat for the California golden trout.
Occasionally they act as a focus for gully erosion
, and wadi channels develop along part of them (e.
Characteristics and Causes of Gully Erosion