National Water-Quality Assessment (NAWQA) Project

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Agriculture and the Quality of the Nation's Waters

Contacts

Paul Capel
Team Lead, NAWQA Integrated Watershed Studies
Email: capel@usgs.gov
Phone: 612-625-3082

Mark Munn
Nutrient Ecologist, NAWQA Regional Stream Quality Assessment
Email: mdmunn@usgs.gov
Phone: 253-552-1686

 

We all have a connection to agriculture, which supplies a major part of the Nation’s food, feed, and fiber needs. Agricultural chemicals move into and through every component of the hydrologic system, including air, soil, soil water, streams, wetlands, and groundwater. Intensive studies by the USGS National Water-Quality Assessment Project in agricultural areas provide insight into how agricultural activities have altered the natural flow of water and the way that agricultural chemicals enter streams and aquifers, and in particular how nutrients affect algal and invertebrates communities in agricultural streams.

The results of the studies are described in two USGS publications: Agriculture—A River Runs Through It—The Connections Between Agriculture and Water Quality and Understanding the Influences of Nutrients on Stream Ecosystems in Agricultural Landscapes.

 

Publications

USGS Circular 1433: Agriculture—A River Runs Through It—The Connections Between Agriculture and Water Quality
Overview
Complete report

USGS Circular 1437: Understanding the Influences of Nutrients on Stream Ecosystems in Agricultural Landscapes

Chapter 1
Complete report

 


Results of intensive studies of agricultural areas across the United States are summarized in USGS Circulars 1433 and 1437.

Presentations

              

 

Related reports and journal articles

Circular 1433: related publications
Circular 1437: related publications

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