Procedure:
• Select a reference point at the downstream end of your site and on one bank drive a peg
into the ground.
• Attach the 50 m tape measure to the peg and lay it out taut for its full distance (or 5 x
the stream width, whichever is the smaller). Attach the upstream end of the tape to a
second peg.
• Calculate 10 equally spaced intervals along the tape measure (e.g., 5-m intervals for a 50
m distance).
• Attach the end of the 20 m tape measure to a third peg at the location of the reference
peg and unwind the tape at right angles to the main tape. Anchor the far end with the
fourth peg on the far bank.
• Divide the width of the stream (water's edge to water's edge) into 10 equally spaced
points.
• Place the sampling quadrat on the stream bed centred on the first point.
• Hold the glass bowl on the surface of the water to obtain a clear view of the stream bed