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Title: Investigation of Optimum Sample Number and Timing for Determining Pollution Loads

 Duration: September 1, 1997 to August 31, 1998

 Federal Funds: $84,514

 Non-Federal Funds: $169,066

 Principal investigators names and university:

Marc A. Nelson, Research Associate, Arkansas Water Resources Center, Water Quality Lab

University of Arkansas, Fayetteville, AR, 72701

Thomas S. Soerens, Assistant Professor, Civil Engineering

University of Arkansas, Fayetteville, AR, 72701

David G. Parker, Professor, Civil Engineering

University of Arkansas, Fayetteville, AR, 72701

Jean Spooner, Associate Professor, (Subcontractor)

North Carolina State University, Water Quality Group

North Carolina State University, Box 7637

Raleigh, NC, 27695-7637

 Congressional district of university where the research is to be conducted: Third

 Statement of critical regional water problems:

 Accurate measurements of pollution loads in streams is critical for determining the impacts of non point source (NPS) pollution in the Arkansas and Southeast U.S. Regions. Many researchers are currently attempting to determine these impacts. There are, however, no consistent rules or guidelines for determining the best sampling technique to be used. The ideal technique is to continuously measure stream flow and the concentrations of the pollutants of interest (typically solids and nutrients). Pollutant loads may then be calculated with a high degree of precision and accuracy. If flow measurements are available in real time and sampler can be properly programmed, then flow weighted composites can be collected. However, these techniques are often not realistic due to economic and/or technical restraints.

U.S. Department of the Interior, U.S. Geological Survey

Maintained by: John Schefter
Last Updated: Wednesday March 23, 2005 9:17 AM
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