aeolian part 1

aeolian part 1 - The Topography of Arid Lands Chapter 18 1,...

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Unformatted text preview: The Topography of Arid Lands Chapter 18 1, 6, and 8 April 2010 People and the Environment Desertification (p. 537) Arid Lands Christophers on Arid Lands Characteristics: • Infrequent precipitation • High potential evaporation • Sharp landscape • Little vegetation • Ephemeral or exotic streams • Mechanical weathering • Thin soil profile Figure Arid Lands • Xerophytic– plants adapted to withstand protracted dry conditions – Modification to root system – Modification of stems to store moisture (succulents) – Hard, waxy, light colored, small leaf surfaces to reduce evaporation Figure Desert Surfaces 1. Erg (Sand Sea) – depositional 2. Reg (Stony Desert) – erosional 3. Hamada (Barren Bedrock) – erosional Reg - Desert Pavement Erg (sand sea) Hamad a Desert Geomorphic Agents win water The day after a 3.57 cm rain “storm”… a month later… Desert Geomorphic Agent: Water Precipitation: • Usually not the entire drainage network • Not frequent • Storm P totals high compared...
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This note was uploaded on 02/17/2011 for the course GEOL 201 taught by Professor Baruah during the Spring '10 term at South Carolina.

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aeolian part 1 - The Topography of Arid Lands Chapter 18 1,...

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