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Lecture

Water Under Fire - Fraser River.docx

2 Pages
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Department
Earth Sciences
Course Code
EARTHSC 2WW3
Professor
John Macclean

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March 19, 2014 Water Under Fire – Fraser River • Several industries along the shore: pulp mills, logging companies and hydroelectric power • Rich biodiversity in the rivers • Upergoat watershed o Valuable habitat o Home to grizzly bears and endangered caribou o Fish spawn here • Wild fish need wild forest – forest is disappearing o Cleared 1/5 o Industrial logging has doubled during time period o 650 million hectares of virgin forest every year o Many clear cuts • Prince George – Nachako River Tributary o Some tributaries release to trickles o No increase in flow that a lot of species require • Dam Effects o Increase temperature  Bold trout disappearing  Important culturally (first nations) and for tourism o Adult salmon stop feeding after they enter river  Rely on stored fat  If they burn more energy while going up river they can die  Loss stock due to dams • Threats to fish stock o Loss of habitat o International fishing o Climate change o Changes in the ocean o Politics • Track fish with micro chips  • Riparian zones have been destroyed o They replenish water table o Provide shade for fish (sensitive to higher temperatures) • Best agriculture land in Canada downstream of the river o Intense pressure on the river o Pumping and dikes of dikes keep flood levels lower than crops  If they were to fail, economical problems o Fertilizers and pesticides runoff into the stream  Increase algae, decrease oxygen • Contaminate underwater aquifer o Chicken manure fertilizers berries + pesticides  o Now strict measures for protection (abandoned water source)  Too little too late o Non­sustainability • No housing allowed on ariable lan
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