Chapter 10_Soils & Sediments

Chapter 10_Soils & Sediments - Soils & Sediments...

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Chapter 10 Chapter 10 Don’t get blown away!
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Definition of Soils Definition of Soils • A natural medium, formed from weathering, that supports vegetation. A heap of quartz sand will not support vegetation. • A soil contains six (6) basic components: –wa ter –a ir – organic matter
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Engineering Classifications Engineering Classifications • Rock – requires blasting or heavy earth-moving equipment • Soils – can be excavated by hand or with a light earth- moving equipment
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Soils vs. Sediments Soils vs. Sediments • Soil differs from sediments in that the term soil implies very little transportation from were it was formed while sediments are transported and redeposited by wind, water, ice, or gravity. Sediments may ultimately become incorporated into and/or form sedimentary rocks.
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Soil Organic Matter Soil Organic Matter • Soil organic matter is the fraction of the soil composed of anything that once lived. It includes plant and animal remains in various states of decomposition, cells and tissues of soil organisms, and substances from plant roots and soil microbes. Well- decomposed organic matter forms humus, a dark brown, porous, spongy material.
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Man's Perception of Soil Man's Perception of Soil • An engineer sees the soil as a support media for buildings, bridges, and highways. • A miner sees soil as the overburden that has to be removed to access valuable minerals. • A landscaper sees soils as a resource to beautify parks and gardens. • The agriculturist and forester as a resource to grow crops and trees. • A hydrogeologist see it as a filter to eliminate potential groundwater contamination.
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Formation of Soils - Pedogenesis Formation of Soils - Pedogenesis Five (5) factors influence soil formation: • Climate • Parent rock • Organisms • Relief (slope, topography) •T i m e
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This note was uploaded on 04/28/2008 for the course CE 200 taught by Professor Unknown during the Fall '07 term at University of Alabama at Birmingham.

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Chapter 10_Soils & Sediments - Soils & Sediments...

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