Percolation and seepage

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Presentation transcript:

Percolation and seepage

Which is harder to clean up, surface water or groundwater?

Groundwater pollution sticks around... Very cold, no bacterial breakdown Very slow water movement: recharge can take 100’s or 1000’s of years Pollutants can stick to rocks in aquifer and pollute new water

What Pollutes Groundwater?

Sources of Groundwater pollution... landfills leaky underground storage tanks mines septic tanks hazardous waste - deep well injection any pollutant in runoff that percolates

Case Study: Natural Gas Drilling Marcellus Shale Fracking - Hydraulic Fracturing Loophole in Safe Water Drinking Act natural gas companies don’t have to disclose chemicals being used http://gaslandthemovie.com/

Earth = the natural filter

How can we protect groundwater? Prevention is the key… Monitor aquifers & landfills Requirements for old fuel tanks Leak detection system Liability insurance Stricter regulations on toxic waste disposal Above-ground storage of toxic waste...but then you have toxic mud spills!

Water pollution laws Recreation: Water fit for fishing and swimming, cleaned up locally (1972 Clean Water Act) Oceans: Controlled dumping of waste and required double hulled tankers to prevent oil spills (Oil Pollution Act) Drinking Water: Protect groundwater and surface water from pollution (1975 Safe Drinking Water Act)