EESA06H3 Lecture 11: Lecture 11
Document Summary
Lecture 11 y protecting human society from natural stuff. y urban development & sprawl. Toronto has huge demand for concrete, you need gravel to make it as well as rock. We use lake ontario, change circulation pattern in water. y we tend not to use surface water because it is sensitive to pollution. We use lake water, rivers and ponds for drinking water. y ground water that moves down through rocks and sediments. Rocks fracture because of plate tectonics. y hardens example at highland creek. Big bends in river in the early days. With urbanization, less water goes into the ground. Shape of these contaminant plumes is the same. y 1200 landfills in southern ontario. Need to know what is in it. y brown filled sites. Need to know what was under the surface. y soil mixed with gasoline. Worked well. y radon gas is a product of the breakdown of uranium.
