Transcription of Chapter 13 - SEDIMENT MEASUREMENTS
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Chapter 13 - SEDIMENT MEASUREMENTS
Water Quality Monitoring - A Practical Guide to the Design and Implementation of Freshwater Quality Studies and Monitoring Programmes Edited by Jamie Bartram and Richard Ballance Published on behalf of United Nations Environment Programme and the World Health Organization 1996 UNEP/WHO ISBN 0 419 22320 7 (Hbk) 0 419 21730 4 (Pbk) Chapter 13 - SEDIMENT MEASUREMENTS This Chapter was prepared by E. Ongley. Sediments play an important role in elemental cycling in the aquatic environment. As noted in Chapter 2 they are responsible for transporting a significant proportion of many nutrients and contaminants.
Table 13.2 Particle size classification by the Wentworth Grade Scale Particle description Particle size (mm) Cohesive properties Cobble 256-64 Non-cohesive Gravel 64-2 Very coarse sand 2-1 Non-cohesive sediment Coarse sand 1-0.5 Medium sand 0.5-0.25 Fine sand 0.125-0.063 Silt 0.062-0.004 Cohesive sediment Clay 0.004-0.00024
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