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18 Cards in this Set
- Front
- Back
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How large does a lake have to be to be considered a great lake |
500km2 |
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How many great lakes in the world |
250 |
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How many of the great lakes in the world reside in Canada |
1/3 |
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How large is the watershed in the great lakes |
750000 square km3 |
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How long is the shoreline |
20 000 km |
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How much water is in the great lakes |
23 000 km3 |
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What is the area of the great lakes |
250 000 km2 |
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Percentage of world's fresh water supply |
18% |
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Welland Canal |
between Erie and Ontario |
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4 main contributors to pollution |
atmospheric deposition surface runoff ground water movement contaminated sediment |
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Natualized Non-native species |
able to reproduce and maintain a population |
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characteristics to invade |
compete for food and habitat few natural predators adaptable reproduce quickly thrive in disturbed systems |
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International joint comission |
respect competing interests investigate water pollution investigate air pollution |
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International Joint commission established in |
1909 |
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GLWQA 1972 |
developed for Lake Erie and phosphorous loadings |
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GLWQA 1978 |
revised for toxic contaminants, virtual elimination, started regulating pipes |
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GLWQA 1987 |
determined AOCs and RAPs |
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GLWQA 2012 |
reaffirming GLWQA |
