Land Degradation - Land Degradation MIE380: Ecological...

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Land Degradation IE380: MIE380: Ecological Systems Spring 2010 March 15, 2010
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Review What is BOD? How is it measured? What is the significance of this measurement? How is it minimized? What complicates this process? 2
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Land Degradation Decrease in the value of the soil Causes : Land clearance (e.g. deforestation) griculture (e.g. poor rming ractices) Agriculture (e.g. poor farming practices) Overgrazing Irrigation Urbanization Industrial and domestic waste Quarrying 3
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Land Degradation (cont’d) Consequences : Accelerated soil erosion Soil acidification or alkalinisation linization Salinization Destruction of soil structure including loss of organic matter Derelict soil (brownfields) 4
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Deforestation The clearance of naturally occurring forests via unnatural means (e.g. Logging, burning) Without sufficient reforestation Forests still cover about 30 % of the world’s land ea area Rain forests have decreased from covering 14 %
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This note was uploaded on 07/24/2010 for the course MIE MIE380 taught by Professor Enright during the Spring '10 term at University of Toronto- Toronto.

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Land Degradation - Land Degradation MIE380: Ecological...

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