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School Made Sampling Field Studies Equipment

1. Sounding Line
used to measure the depth of a water body.

Materials

  • ½ red construction brick
  • 4' eyebolt with nut
  • 2 washers
  • nylon cord
  • snap or clip
• Use a hack saw to cut a complete construction brick in half.
• Drill a hole in the brick using a masonry drill.
• Place one washer on the bolt and put it through the hole in the brick, add the second washer and tighten the nut.
• Securely attach the nylon cord to the snap or clip.
• Mark the cord at one meter intervals to a length of 10 15 meters depending on the areas you plan to visit.
• The clip on the line can then be attached to the eyebolt and also removed and used with other equipment.
• Use: Lower sounder into water until it touches the bottom and record the amount of line sent down.


2. Secchi Disk
used to measure turbidity of water.

Materials

  • 3 - 4 large aluminum can lids
  • Place duct tape around edge.
  • Drill a hole in the center
  • Put rope through hole and secure
  • Use: Lower secchi disk into water until it can no longer be seen. Record the depth. A more accurate reading can be found if this process is repeated several times and an average is taken. If the water is cloudy or has a large amount of suspended solids in it sunlight will not penetrate into the deep water.


3. Collection Nets
used to collect samples of organisms in water.

  • nylon stocking or cheese cloth
  • coat hanger
  • broom stick
  • Assemble items to create a net as shown in diagram at right


4. Coke Bottle Sampler
used to collect water samples for chemical tests.

Materials

  • 32 ounce Coke bottle
  • 4 pound weight
  • epoxy
  • #2 single hole rubber stopper
  • 2' eyebolt with 2 nuts
  • 15' nylon cord
• Mix epoxy and use it to attach weight to bottom of bottle.
• Place one nut on the eyebolt and place it through the hole in the stopper.
• Securely attach the other nut.
• Tie one end of the cord securely to the neck of the bottle.
• At 6', tie the cord to the eyebolt.
• Tie a loop in the free end of the cord.
• The sounding line is attached to the loop.
• Use: Place stopper into bottle and lower to desired depth. Pull with a jerking motion on the cord to open bottle. Allow time for bottle to fill and bring sample up.


Printed with permission from Michal L. Le Vasseur, 2001



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