USGS

Water-Quality Parameters and Benthic Algal Communities at Selected Streams in Minnesota, August 2000—Study Design, Methods, and Data

U.S. Geological Survey Open-File Report 02-43

 

By K.E. Lee

 

This report is also available as a pdf.

 

Abstract

Water-quality measurements and benthic algal samples were measured or collected from select Minnesota streams as part of a multiagency (Minnesota Pollution Control Agency, Minnesota Department of Natural Resources, U.S. Environmental Protection Agency, and U.S. Geological Survey) study. The goal of the multiagency study was to identify quantifiable thresholds of water-quality impairment and establish quantifiable indicators of nutrient enrichment for medium to high-order streams.

This report describes the study design, sampling methods, and summarizes the physical, chemical, and benthic algal data for a component of the multiagency study that was designed to document diurnal water-quality measurements (specific conductance, pH, water temperature, and dissolved oxygen), benthic algal community composition and chlorophyll-a content, and primary productivity at 12 stream sites on 6 streams in Minnesota during August 2000. Specific conductance, pH, water temperature, dissolved oxygen concentrations and percent dissolved oxygen saturation measurements were made with submersible data recorders at 30 minute intervals for a period of 3-6 days during August 2000. Benthic algae collected from wood and rock substrate were identified and enumerated. Biovolume (volume of algal cells per unit area), density (number of cells per unit area), and chlorophyll-a content from benthic algae were determined. These data can be used as part of the multiagency study to develop an understanding of the relations among nutrient concentrations, algal abundance, algal community composition, and primary production and respiration processes in rivers of differing ecoregions in Minnesota.

Contents

Abstract

Introduction

Purpose and scope

Study design and methods

Precipitation data

Hydrologic Data

Diurnal water-quality measurements

Stream productivity and respiration estimates

Benthic algae collection and identification

Hydrologic characterization

Parameters

Water quality

Primary production and respiration

Benthic Algae

References

Supplemental information


 

For additional information write to:

 

U.S. Geological Survey

District Chief

2280 Woodale Drive

Mounds View, MN 55112

 

Copies of this report can be purchased from:

 

U.S. Geological Survey

Branch of Information Services

Box 25286, MS 517

Federal Center Denver, CO 80225

 

For product and ordering information: World Wide Web: http://www.usgs.gov/pubprod

Telephone: 1-888-ASK-USGS

 

For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: World Wide Web: http://www.usgs.gov Telephone: 1-888-ASK-USGS


This report is available online in Portable Document Format (PDF). If you do not have the Adobe Acrobat PDF Reader, it is available for free download from Adobe Systems Incorporated.

Download the report (PDF, 2 MB)

Document Accessibility: Adobe Systems Incorporated has information about PDFs and the visually impaired. This information provides tools to help make PDF files accessible. These tools convert Adobe PDF documents into HTML or ASCII text, which then can be read by a number of common screen-reading programs that synthesize text as audible speech. In addition, an accessible version of Acrobat Reader 5.0 for Windows (English only), which contains support for screen readers, is available. These tools and the accessible reader may be obtained free from Adobe at Adobe Access.

 

Top


U.S. Department of the Interior, U.S. Geological Survey
Persistent URL:
Page Contact Information: Contact USGS
Last modified: Wednesday, December 07 2016, 07:19:28 PM
FirstGov button  Take Pride in America button