GL Water Quantity

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GL / GL Water / Water Quantity: How much water is in the GL?

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Last updated in September, 2000

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	The Great Lakes are one of the greatest water sources in the U.S., containing 95 percent of the nation's and 20 percent of the world's fresh surface water. The primary measures of water quantity are the levels of the individual Great Lakes and Lake St. Clair. Water level needs to be understood in connection to the physical system and hydrological cycle.

	1. How many Lake Erie could fit into Lake Superior? 2. If the level of Lake Superior dropped by 10 cm (about 4 inches), how much less water would the lake have?

	1. ES-EAGLS: Land & Water Interactions in the Great Lakes 2. ES-EAGLS: Great Lakes Climate & Water Movement 3. Supplemental Activities for Holling C. Holling's Paddle-to-the-Sea 4. The Great Lake Erie 5. Lake Erie water levels (FS-025) ... Free (614 / 292-8949 or e-mail)
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	1. ES-EAGLS: Great Lakes Climate & Water Movement How do the levels of the Great Lakes change? What would be the results of regulating the level of one of the Great Lakes? How do the Great Lakes change through the seasons? 2. Activities for the Changing Earth System How can we map changes in water level? How high's the water? Is sea level rising? Well, it depends. 3. Great Lakes Instructional Materials for the Changing Earth System How is the precipitation of the Great Lakes Basin related to lake level change? 4. Lake-Aware Kids Engaged in Relevant Science What causes the shoreline to erode?
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	Bathymetry of Lake Erie, from NOAA's NGDC
	Bathymetry of Lake Erie, from NOAA's NGDC
	1. Natural Process of the Great Lakes http://www.cciw.ca/glimr/data/great-lakes-atlas/glat-chap2.html 2. Great Lakes Net Basin Supply Forecast Model http://mcc.sws.uiuc.edu/glakes.html 3. Great Lakes Geomorphology http://www.ngdc.noaa.gov:80/mgg/greatlakes/erie.html 4. Monthly Bulletin of Great Lakes Water Levels http://superior.lre.usace.army.mil/levels/bltnhmpg.html 5. Drought Information Center http://www.dep.state.pa.us/dep/subject/hotopics/drought/drought.htm

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