EESA06H3 Lecture 12: EESA06 Lecture 12
Document Summary
Use probes to ind out about the chemistry of water. 80% of people live in urban areas: rush to the city". Aggregate sand and gravel: something we"re short of so we have to import. No such thing as natural" b/c contaminated by waste. Toronto: going through a boom", usage of site and nature of contaminants. Radon gas produced by breakdown of uranium (in s. ontario) which is used to date rock. Google: lloyd"s city risk index: models risk and looks at impact. Urban sprawl: blanket urbanizaion = hardening of watersheds. Keeps water lowing in areas that have been dry. Ater urbanizaion: surface runof is illed w/ contaminants. So much salt in groundwater: would take 100yrs to rid itself from all of it. Flushing of of sediment and contaminants by creaion of roads into don river. Large areas of canada underlain by frozen ground (permafrost) Permafrost table limit at which ice can melt (seasonal thawing)
