DS DS/EN 28265
DS DSEN 28265 1997-MAR-19 Water qualty - Desgn and use of quanttatve samplers for benthc macro-nvertebrates on stony substrata n shallow freshwaters
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This Standard gives guidance on the equipment and procedures for the quantitative sampling of benthic macro-invertebrates by quadrat samplers in waters of depth less than 500 mm, although methods are described to permit sampling, under certain conditions, in a water depth of up to 1 m.