Soil Erosion. Bird City, Kansas. St. Francis, Kansas . San Luis Valley, Colorado. Al Asad, Iraq. The Dustbowl. How much soil is lost?. 5 Billion Tons, Billion with a “B” lost each year 3.5 Billion tons due to Water 1.5 Billion tons due to Wind. What is average loss?.
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Sediment fills and pollutes a lake
and reduces downhill flow
Sheet erosion exposes sub-soil in the circles