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Beforethe flood
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Great Floodof 1993
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Gasconade River
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Missouri River
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Figure 5.2
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Regional – affected nine states
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Region affected
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text
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Previous major flood 1973 $1.2 billion
1993 Flood > $15 billion
Late June through early August
21,000 square miles flooded
Wet autumn, heavy spring snowmelt, early June high and low pressure patternsestablished and did not move
Wettest summer on record 35 inches in 4 months(equivalent to an entire average year)
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Hydrograph from Mississippi River
30 feet was considered 500-year flood
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Missouri River floodplain
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Cedar City, Iowa
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Iowa farmland
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Levee breaks
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Jefferson City, Missouri
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Confluence of Mississippi & Missouri Rivers
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Chapter 5 Opening Figure
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Figure 5.3
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Figure 5.4
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Floodplain deposits
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Missouri River floodplain after the flood
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Rebuilding: Higher and stronger levees
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Rebuilding: A new mall in the floodplain
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What policies would you recommend to minimize future flood damage?