![[cd2-11]](/Kola/cd2-11.gif)
(Photo: C. Reimann)
Fig. 1: Collection of suspended organic material in a stream requires the use of a large sampling net («the butterfly net»).
Rationale
The suspended organic material in a stream strongly adsorbs trace
metals and is, therefore, suited for the characterisation of its
level of contamination. It is sampled with a large net (Fig. 1)
in slow flowing portion of the stream.
Advantages
Gives an idea of the organically bound fraction of the contaminants.
Drawbacks
Fine mineral matter (esp. micas) is collected in various quantities
together with the suspended organic matter.
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COLLECTING ORGANIC STREAM SEDIMENTS (Photo: C. Reimann) Fig. 1: Collection of suspended organic material in a stream requires the use of a large sampling net («the butterfly net»).
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