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Erosion
Published on Dec 05, 2015
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PRESENTATION OUTLINE
Erosion
By: Braden Albertson and Jonathan Fu
In geomorphology and geology, erosion is the action of exogenic processes (such as water flow or wind) which remove soil and rock from one location on the Earth's crust, then transport it to another location where it is deposited.
Photo by Smart Destinations
Causes
Some of the biggest contributors and causes of erosion are wind, water, and other rocks. In the desert, high winds send tiny rock particles hurling through the air. These particles change and shape rocks in the landscape. Soil erosion is second only to population growth as the biggest environmental problem the world faces. Yet, the problem, which is growing ever more critical, is being ignored because who gets excited about dirt?”- David Pimentel, Cornell Professor of Ecology.
Photo by Stuck in Customs
Effects
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Erosion effects the soil and land in General. When erosion occurs the water moves the soil or sand downstream which causes the land to form in different ways.
Photo by Phil's 1stPix
How to help
Gardening
There are many ways to help after erosion One thing you can do is plant grass and shrubs so it keeps the soil together. Another thing you can do is plant trees to prevent landslides.
A personal experience for me was planting grass and helping prevent erosion. It prevents erosion by keeping the soil together so it doesn’t make holes in the ground.
A personal experience for me was planting grass and helping prevent erosion. It prevents erosion by keeping the soil together so it doesn’t make holes in the ground.
Photo by James Marvin Phelps
Water Erosion
Moving water is a big factor of erosion. Rain washes away particles of soil and small rocks from the ground which shapes the way the ground looks. For example the Colorado River cuts deeper and deeper into the land every year and eventually created the Grand Canyon.
Bank Erosion
Streambanks erosion is a natural progress and this progress of the bank erosion leads to land loss, habitat loss, and other natural effects. Streambank erosion contributed 49 percent of the total annual sediment yield from three miles of unstable channel on the East Fork San Juan River, Colorado.
Photo by Soil Science @ NC State
Gully Erosion
Gully erosion is an example of soil erosion. Gully erosions are unstable and incised and generally 30 centimeters deep. It occurs where surface water flow has become trapped in a small concentrated stream, and begins to erode channels in the ground surface.
Photo by Frank.Vassen
Rill Erosion
Rill erosion is the removal of soil by concentrated water running through little streamlets. Detachment in a rill occurs if the sediment in the flow is below the amount the load can transport and if the flow exceeds the soil's resistance to detachment. As detachment continues or flow increases, rills will become wider and deeper.
Photo by arbyreed
Wind Erosion
Wind erosion is a big one, It carries dust, sand, and volcanic ash from one place to another. Wind can blow sand into towering dunes. Some sand dunes in the Badain Jaran area of the Gobi Desert in China reach more than 400 meters (1,300 feet) high.
Photo by Alexandre Moreau | Photography
Ice Erosion
Ice erodes land, most of the times at mountaintops, glaciers, and other cold areas. Ice erosion slowly moves downhill and as the ice goes downhill it carries down from small particles of dirt and sand to giant boulders. The rocks carried down by the ice erodes the ground which causes erosion to the ground.
Photo by Piero...
Sheet Erosion
Sheet erosion is the uniform removal of soil in thin layers by the forces of raindrops and overland flow. It can be a very effective erosive process because it can cover large areas of sloping land and go unnoticed for quite some time.
Soil Erosion
Soil erosion by water, wind and tillage affects both agriculture and the natural environment. Soil loss, and its associated impacts, is one of the most important of today's environmental problems.
Photo by ecstaticist
Sea Erosion
Sea erosion occurs when the waves from the sea push up to the sand and shape the the height of the water. For example when you build a sand castle it won't stay there forever, it will eventually be washed away by waves.
Photo by Daniele Zedda
Soil erosion is second only to population growth as the biggest environmental problem the world faces. Yet, the problem, which is growing ever more critical, is being ignored because who gets excited about dirt?”- David Pimentel, Cornell Professor of Ecology.
Landmarks
Some landmarks that were made by erosion are:
-The Flume Gorge, Franconia Notch State Park, New Hampshire
-Shelta Cave, Huntsville, Alabama
-Caverns of Sonora, Texas
-Pilot Mountain, Pilot Mountain State Park, North Carolina
-The Flume Gorge, Franconia Notch State Park, New Hampshire
-Shelta Cave, Huntsville, Alabama
-Caverns of Sonora, Texas
-Pilot Mountain, Pilot Mountain State Park, North Carolina
Photo by wbeem
Poem
- We are slowly undermined. Grain by grain... inch by inch... slippage. It happens as we watch. The waves move their long row of scythes over the beach. It happens as we sleep, the way the clock's hands move continuously just out of sight, but more like an hourglass than a clock, for here sand is running out.
