Geography 2071F/G Lecture : Geography of World Rivers.docx
10 Apr 2014
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Document Summary
Talking about amazon"s: setting, in south america, largest river basin, drains into the atlantic ocean, 70% of basin is located in brazil, bolivia, peru, equador, colombia, venezula, tacantins basin, amazon river changes names, flow, sediment, mouth of amazon is close to equator, picks up sediment in mountainous area, muddy rivers have sediments, black water rivers start in the low lands, carry organic material, broken down plants, no sediment, clear water rivers, human impacts, cities are growing around amazon, no bridges or dams, belo mounte dam scheme/original cost 13 billion now 17 billion/ will be third largest dam in the world, could have big impacts, 2 indigenous tribes live around old water system, logging, mercury, deforestation, grazing, hardwood, cattle, crop, settlements, gold mining, brazil contributes around 7 to 8% of global gold, mercury facilitates amalgamation of gold, mercury is toxic, evaporated mercury is most toxic, lemon helps amalgamation.
