4/16 ERS 102 - Floods and Lakes Important Concepts o...

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Floods and Lakes Important Concepts o Recurrence interval o Maine lakes o Formation o Classification o Water chemistry o Records of environmental history Floods in Maine o “Seasonally pulsed” o Spring- high precipitation Large snow pack and rapid melt o Fall- high prep (hurricanes) Low transpiration How to predict flood hazards? Recurrence Interval-probability o Long record o Peak discharge for each year and then rank them o NOT GUARANTEE OF OCCURRENCE! Flood Prediction o Based on historical information Increase in peak discharge o Climate? o Land use? o Both? Paving o Increase runoff/decrease infiltration o Land use and discharging Levees o Land use and discharging o Artificial levees contain high discharge without flooding How to deal with flood? o Prediction o Monitoring o Floodways? (Zoning) o Flood wise construction NOT levees! Flood Insurance o Required in some locations for loans o There are 33,000 structures at risk of flooding in Maine o Flood insurance coverage in Maine= $1,432,918,800
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This note was uploaded on 04/18/2008 for the course ERS 102 taught by Professor Kelley during the Spring '08 term at University of Maine Orono .

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4/16 ERS 102 - Floods and Lakes Important Concepts o...

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