Non Point Source Pollution Worksheet

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Non Point Source Pollution Worksheet Powered By Docstoc
					      Chapter 9
Groundwater Resources
   Note-taking worksheet
          Section 1: Groundwater
Surface water, is water that is found on the surface of
  the Earth’s crust.




Examples: lakes, rivers, streams, ponds, oceans, seas
Groundwater is water that is
found in the open spaces, or pores
of soil or rock beneath Earth’s
surface.




    Examples: aquifers
   What is the difference in surface water
    and groundwater ?
   Name one example of surface water.
   Name one example of groundwater.
An aquifer is a layer of permeable rock
  through which water flows freely.
 Aquifers act as reservoirs or storage
        areas for groundwater.
                 POROSITY




Pores are tiny spaces or cracks that can hold
 water.
    Groundwater
   normally is not
 found in pools or
      channels
   underground.
      Instead,
groundwater flows
through a series of
  interconnecting
 pores in rock and
        soil.
Pore size can vary and the word
porosity is used to describe how
much water soil or rock can hold.
 P_________describes how much water
  rock or soil can hold.
 An aquifer is a layer of p_______rock
  through which _______flows freely.
 Is the rock in an aquifer permeable or
  impermeable ? Explain.
 Groundwater is not normally found in
  pools or channels . It is usually found in
  interconnecting p____.
 Permeable is a word that describes
rock or soil that allows groundwater
to flow through because that rock or
  soil contains many well-connected
            pores or cracks.
Impermeable describes rock or soil that
  will not allow groundwater to flow
 through because rock or soil has no
    pores or cracks for water to flow
                through.
   What is the difference in permeable rock
    and impermeable rock ?
 The water table is the line where the
soil without water, or zone of aeration,
meets the soil filled with water, known
       as the zone of saturation.
The water table will rise during times
of rainfall and fall during times of
drought.
              Pore space
                is full of
                air – Zone
                of Aeration

Water Table


                Pore space
                is full of
                water –
                Zone of
                Saturation
 Section 2: Groundwater Pollution and Overuse




Pollution is the contamination of soil,
 water, air or other parts of the
 environment by something harmful.
Point-Source water pollution is when waste
         is dumped directly into water.




Examples of Point Source Pollution: Trash dumped into
 a stream, oil poured down an old well.
Nonpoint-source water pollution is
from sources of pollution over a large
                area.
Most groundwater pollution comes
   from the non-point source.
Sources of water
pollution:
    Landfill leaks      Septic tanks leaking
    Runoff              Industry
    Waste spills        Mining
    Road salts          Agricultural waste
    Storage tanks       Feed lots
  Challenges of Groundwater Cleanup




Groundwater cleanup is a slow and expensive process.
The source of pollution is sometimes
 hard to locate and difficult to reach.
            Cleanup Methods




The first step in cleaning up groundwater
 contamination is to remove the source of
 pollution.
 Water can be pumped out of the ground,
then treated to remove the pollutants and
then returned to the water in the aquifer.
Bioremediation uses living organisms
       to remove pollutants.
     Conservation of Water




Groundwater shortages occur when more water
 is pumped out of aquifers than is replenished.
 This is especially a problem in areas where the
 population has increased and places with a
 higher demand on the water supply.
As aquifers hold less and less water,
subsidence can occur where the land
           actually sinks.
Saltwater intrusion can also occur in
   aquifers near an ocean coast.

				
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