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Chapter A6. Section 6.7. Turbidity

January 1, 2005

Turbidity is one of the indicators used to assess the environmental health of water bodies. Turbidity is caused by the presence of suspended and dissolved matter, such as clay, silt, finely divided organic matter, plankton and other microscopic organisms, organic acids, and dyes. This section of the National Field Manual (NFM) describes the USGS protocols for determining turbidity in surface and ground waters, including extensive guidance for equipment selection and data reporting. It includes the revised approach to turbidity measurement and reporting that was implemented by the U.S. Geological Survey (USGS) in October 2004 to account for technological advances and consequent measurement complexities. Each chapter of the National Field Manual is published separately and revised periodically. Newly published and revised chapters will be announced on the USGS Home Page on the World Wide Web under 'New Publications of the U.S. Geological Survey.'

Publication Year 2005
Title Chapter A6. Section 6.7. Turbidity
DOI 10.3133/twri09A6.7
Authors Chauncey W. Anderson
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Techniques of Water-Resources Investigations
Series Number 09-A6.7
Index ID twri09A6.7
Record Source USGS Publications Warehouse
USGS Organization U.S. Geological Survey