Case Study: Mississippi River, USA (Leaving Cert Geography): Flashcards
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Length of Mississippi River
Length of Mississippi River
3,734 km
Mississippi's annual economic contribution
Mississippi's annual economic contribution
$400 billion
Jobs supported by Mississippi River
Jobs supported by Mississippi River
1.3 million
Agency managing Mississippi River
Agency managing Mississippi River
US Army Corps of Engineers
Annual cargo tonnage on Mississippi
Annual cargo tonnage on Mississippi
300 million tonnes
Number of locks & dams in upper course
Number of locks & dams in upper course
29
Length of artificial levees built
Length of artificial levees built
2,500 km
Dams on upper Mississippi & tributaries
Dams on upper Mississippi & tributaries
230
Wing dykes purpose
Wing dykes purpose
Structures at right angles to bank - slow flow & reduce erosion
Dredging definition
Dredging definition
Removing sediment from riverbed
Length removed from river by cut-offs
Length removed from river by cut-offs
243 km
1993 floods damage cost
1993 floods damage cost
$15 billion
Post-Katrina flood defence investment
Post-Katrina flood defence investment
$20 billion
% of original floodplain flooded today
% of original floodplain flooded today
10%
% US grain exports via Mississippi
% US grain exports via Mississippi
60%