GULLY EROSION
When rills become larger in size and shape, these are called gullies.
Final stage of rills is initial stage of gully.
Gully is defined as “miniature valley scoured by concentrated runoff flowing immediately after heavy rains”.
Gullies reduce the productivity of farmland and produce a lot of sediment.
In the absence of proper control measures, gullies spread over the entire watershed.
Once started, gullies will advance headward with collapse of side walls.
A gully is too large to be filled by normal tillage practices.
Major causes of gully erosion are: removal of vegetation, (deforestation, over-grazing on hillsides), steepness
slope, soil texture, rainfall intensity, land mismanagement, incorrect agricultural practices, etc.,
Sheet erosion Rill erosion Gully erosion
,
,
, Main processes in the development of gullies are
i) waterfall erosion and
ii) channel erosion.
These two erosions are commonly found in the same gully.
Water fall accelerates gully head erosion;
Channel erosion scours bottom and sides of the gully thus enlarging the depth
and width of gullies.
Waterfall erosion at gully head
When rills become larger in size and shape, these are called gullies.
Final stage of rills is initial stage of gully.
Gully is defined as “miniature valley scoured by concentrated runoff flowing immediately after heavy rains”.
Gullies reduce the productivity of farmland and produce a lot of sediment.
In the absence of proper control measures, gullies spread over the entire watershed.
Once started, gullies will advance headward with collapse of side walls.
A gully is too large to be filled by normal tillage practices.
Major causes of gully erosion are: removal of vegetation, (deforestation, over-grazing on hillsides), steepness
slope, soil texture, rainfall intensity, land mismanagement, incorrect agricultural practices, etc.,
Sheet erosion Rill erosion Gully erosion
,
,
, Main processes in the development of gullies are
i) waterfall erosion and
ii) channel erosion.
These two erosions are commonly found in the same gully.
Water fall accelerates gully head erosion;
Channel erosion scours bottom and sides of the gully thus enlarging the depth
and width of gullies.
Waterfall erosion at gully head
