Soils_2 - Soil erosion rates depend on • Soil...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Soil erosion rates depend on: • Soil properties (engineering properties) • strength (cohesion) • erodibility (determined by texture, strength, soil moisture) • Land use (including vegetation cover) • Topography (slope and length of hillside) • Climate (rainfall and percentage of runoff) Estimated average loss for US croplands: 5 tons/acre/year Rates of soil formation depend on: • Same factors governing soil development Estimated by thickness of soil and years of formation Average gain: 1-4 tons/acre/year Soil is a diminishing resource Soil thickness 100 cm Years to form 10,000 yr = 0.01 cm/yr Can we estimate the rate of soil formation for Long Island soils? Typical thickness of soil: 100 cm Years soil has been forming: 10,000 yr Land use and soil erosion Soil erosion measured by sediment yield to streams Land use and soil erosion Agriculture • Large areas of land used • Long duration of activity • Fertile “topsoil” lost first Decrease in crop yield Increased fertilizer use...
View Full Document

This note was uploaded on 05/13/2011 for the course GEO 101 taught by Professor Hanson during the Spring '08 term at SUNY Stony Brook.

Page1 / 30

Soils_2 - Soil erosion rates depend on • Soil...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online