RiversandFlooding

RiversandFlooding - Streams & Rivers • basic part of...

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Subject: Environmental Geology Session: Chapter 8 - Rivers and Flooding at 09:36 AM Case Study - Mississippi River Floods • 1973 spring flood caused • evacuations of tens of thousands • inundation of thousands of km^2 of farmland • $1.2 billion in property damage • 1993 summer flood • century flood in magnitude (100-year flood) • from climatic anomaly - unusual precipitation, snowmelt • lasted late June to early August • 50 deaths, $10 billion in damage • levees provided false sense of security
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Unformatted text preview: Streams & Rivers • basic part of hydrologic cycle • streams = small rivers • river components include • network of streams - tributaries & rivers • watershed or drainage basin • drainage basin - gullies gather water, all water in gullies in an area leads/funnels to a tributary • base level (lowest level it erodes material) and stream gradient • latitudinal profile • longitudinal profile • grading process - depositing materials along stream • Sediment in Rivers...
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This note was uploaded on 11/14/2011 for the course GEOG 1002 taught by Professor Engstrom during the Fall '11 term at GWU.

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RiversandFlooding - Streams & Rivers • basic part of...

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