Conservation Exam 3

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Conservation Exam 3
2011-03-29 21:16:43

Exam 3 Cards
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  1. Water Pollution
    • Comes in pulses from towns (when it rains)
    • Can contain high concentrations of salt
  2. Before and After Urbanization
    • Before Urbanization: Evaporation – 40%, Surface Runoff – 10%, Groundwater – 50%
    • After Urbanization: Evaporation - 25%, Surface Runoff - 43%, Groundwater - 32%
  3. How to Control Flooding (general)
    • Slow down water flow
    • Increase absorbtion
  4. Reducing flooding and damage from flooding:
    • Don't remove wetlands
    • Don't remove upland vegetation
    • Don't remove streamside vegetation
    • Don't channelize streams
    • Don't build in floodplains
  5. Salinization
    • Occurs where you irrigate arid areas
    • Brings salt out of the gound
    • Forms salt pans
    • Vegetation doesn't recover in this area
  6. Ogalala
    • Supplies water to about 20% of the area.
    • Recharge rate extremely low.
    • Most of the recharge has come from ice melt from the last iceage.
    • Conversion of land to corn should increase water use.
  7. Glacial lakes
    “Prairie Potholes”
    • (Eastern SD)
    • This region is the biggest region for the production of waterfowl for the country.
    • Has suffered a reduction of about 50% of ponds and 50% of water fowl populations.
    • The ponds are disappearing because of drought.
  8. Point vs Non-Point Pollution
    • EPA Regulations Point-Source Pollution. (Can be followed back to a source.)
    • Most of the pollution in the US and worldwide is from non-point sources. (Running across the land, carrying pollutants.)
    • Non-Point are more common.