Transcription of Chapter 2 - WATER QUALITY
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Chapter 2 - WATER QUALITY
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 2 - WATER QUALITY This Chapter was prepared by M. Meybeck, E. Kuusisto, A. M kel and E. M lkki WATER QUALITY is a term used here to express the suitability of WATER to sustain various uses or processes. Any particular use will have certain requirements for the physical, chemical or biological characteristics of WATER ; for example limits on the concentrations of toxic substances for drinking WATER use, or restrictions on temperature and pH ranges for WATER supporting invertebrate communities. Consequently, WATER QUALITY can be defined by a range of variables which limit WATER use.
(geological, topographical, meteorological, hydrological and biological) in the drainage basin and varies with seasonal differences in runoff volumes, weather conditions and water levels. Large natural variations in water quality may, therefore, be observed even where only a single watercourse is involved.
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