17_Grt_LakesSpring2008

17_Grt_LakesSpring2008 - Lecture 17:Environmental Issues...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Lecture 17:Environmental Issues for the Really Great Lakes Ecology, Economy, and the Politics of Natural Resources Geography 1000 Spring 2008 In this lecture…. . • Origins of the Great Lakes • Physical Description of the Lake System • Pollutants which are of concern • Exotic Species • Economic Importance • An excess of management agencies The Greatest Source of Fresh Water in the World--20% of Earth‘s surface fresh water.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 The Great Lakes • Lake Superior 31,700 square miles • Lake Huron 23,000 square miles • Lake Michigan 22,300 square miles. • Lake Erie 9,910 square miles • Lake Ontario 7,540 square miles – BUT Superior contains more water than all of the other Great Lakes combined! There are really only 4 Great Lakes BUT why quibble? • Hydrologically, Lakes Michigan and Huron are one lake as they are connected by the Straits of Macinac and receive water from Lake Superior through Saint Mary‘s River. • Lake Ontario is the smallest Lake which has been called the ―last, least, little, lost lake‖ because it is the lowest and smallest lake in the system and gets 80% of its water from the other lakes. STILL it is the 12th largest lake in the world--which gives a good idea of the size of the others!
Background image of page 2
3 Origins of the Great Lakes • 13,000 -9,000 BC massive glaciers associated with the Northern Ice cap receded.(test question) • The receding glaciers carved canyons where once there were riverbeds. In process, they flattened and compacted the Great Lakes region. • Meltwater filled the ―Lakes‖ which cover 95,000 square miles. • They drain from west to east, via the St. Laurence seaway, into the Atlantic Ocean
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 SUPERIOR MICHIGAN ERIE ONTARIO 601 ASL 578 ASL 570 ASL 245 ASL Maximum depth 1330 feet Mich. Max Depth 923 feet Huron 750 feet 210 Feet 810 feet Some Comparisons of the System Economic Contributions • The Great Lakes and their basins are home to 35 million Americans and Canadians. Major cities abound including many of the nations most important industrial cities such as Chicago, Detroit,Buffalo, Cleveland etc. .. • Major agricultural lands along the southern shores,
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/06/2008 for the course GEOG 1000 taught by Professor Veeck during the Spring '08 term at Western Michigan.

Page1 / 23

17_Grt_LakesSpring2008 - Lecture 17:Environmental Issues...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online