Mapping the river watershed area

  1. Have a discussion about all possible surface waters in your neighborhood:
  • Do you know from where streams, rivers, lakes, ponds, lagoon in your town get their water?
  • How large is the watershed of your river?
  1. Making the map of watershed:
  • Take a map of the province. Cover the map with translucent tracing paper.
  • Choose a stream, river, or lake in your vicinity, and trace it down on translucent paper.
  • Try to define the borders of the watershed by defining the high ridgeline. Draw the borders of the watershed on translucent paper.
    • Are there any dams or reservoirs? If yes, draw them on the paper.
    • Are there any wetlands? If yes, draw them on the paper.
    • Have a discussion and attempt to describe how the water system functions in a chosen watershed.
    • From where does the river, stream, or lake receive its water?
    • Does the river run through a canal or is it natural? How does this affect the flow of the river or stream?
    • Is there a large flood plain along the river or stream that is flooded every year? What can happen if we build a new town on the floodplain?
  1. Take a pencil and drop it on the map. The end-point of the pencil shows the location of water contamination with poison that was accidentally spilled because of a car accident.
  • Which streams and rivers in the river watershed will be contaminated?