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Streams and Rivers

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National Water Monitoring Network

To manage our water resources effectively, we need to understand how much water is available and its usefulness. The USGS monitors the nation’s water resources through various national observing networks that use a range of technologies and methods to assess real-time water conditions and predict future changes in water availability for human and ecological uses.
National Water Monitoring Network

National Water Monitoring Network

To manage our water resources effectively, we need to understand how much water is available and its usefulness. The USGS monitors the nation’s water resources through various national observing networks that use a range of technologies and methods to assess real-time water conditions and predict future changes in water availability for human and ecological uses.
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Reconstructing Flow History From Riparian Tree Rings

FORT aquatic scientists analyze rings of riparian trees relating tree growth and establishment to historical flow. They then use the tree rings to reconstruct the flow in past centuries. Flow reconstructions discover the frequency and magnitude of past droughts and floods—information that is essential for management of rivers and water supplies. They have pioneered the use of cottonwood, a...
Reconstructing Flow History From Riparian Tree Rings

Reconstructing Flow History From Riparian Tree Rings

FORT aquatic scientists analyze rings of riparian trees relating tree growth and establishment to historical flow. They then use the tree rings to reconstruct the flow in past centuries. Flow reconstructions discover the frequency and magnitude of past droughts and floods—information that is essential for management of rivers and water supplies. They have pioneered the use of cottonwood, a...
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National Water Availability Assessments

The USGS National Water Availability Assessment consists of reports, which provide a scientific summary and interpretation of water quantity, quality and use, and the data companion, which delivers model-based estimates of water supply and demand.
National Water Availability Assessments

National Water Availability Assessments

The USGS National Water Availability Assessment consists of reports, which provide a scientific summary and interpretation of water quantity, quality and use, and the data companion, which delivers model-based estimates of water supply and demand.
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Regional Water Availability Assessments

Regional Water Availability Assessments are scientific assessments of water availability in different hydrologic regions across the Nation. They are designed to capture a range of conditions in major drivers of water availability.
Regional Water Availability Assessments

Regional Water Availability Assessments

Regional Water Availability Assessments are scientific assessments of water availability in different hydrologic regions across the Nation. They are designed to capture a range of conditions in major drivers of water availability.
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Integrated Water Availability Assessments

The USGS Water Resources Mission Area is assessing how much water is available for human and ecological needs in the United States and identifying where and when the Nation may have challenges meeting its demand for water.
Integrated Water Availability Assessments

Integrated Water Availability Assessments

The USGS Water Resources Mission Area is assessing how much water is available for human and ecological needs in the United States and identifying where and when the Nation may have challenges meeting its demand for water.
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Integrated Water Availability Assessments Fundamentals

The USGS Water Resources Mission Area is assessing how much water is available for human and ecological needs in the United States and identifying where and when the Nation may have challenges meeting its demand for water.
Integrated Water Availability Assessments Fundamentals

Integrated Water Availability Assessments Fundamentals

The USGS Water Resources Mission Area is assessing how much water is available for human and ecological needs in the United States and identifying where and when the Nation may have challenges meeting its demand for water.
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National Water Availability Assessment Data Companion

The National Water Availability Assessment Data Companion (NWDC) delivers model-based estimates of water supply and demand.
National Water Availability Assessment Data Companion

National Water Availability Assessment Data Companion

The National Water Availability Assessment Data Companion (NWDC) delivers model-based estimates of water supply and demand.
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USGS National Streamgaging Network

As of October 2024, the USGS Groundwater and Streamflow Information Program supports the collection and (or) delivery of both streamflow and water-level information at 8,705 sites and water-level information alone at 3,460 additional sites. The data are served online—most in near real-time—to meet many diverse needs including the protection of life, property, the environment, and our economy.
USGS National Streamgaging Network

USGS National Streamgaging Network

As of October 2024, the USGS Groundwater and Streamflow Information Program supports the collection and (or) delivery of both streamflow and water-level information at 8,705 sites and water-level information alone at 3,460 additional sites. The data are served online—most in near real-time—to meet many diverse needs including the protection of life, property, the environment, and our economy.
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Centennial Streamgages

Centennial Streamgages are USGS streamgages that have been in operation for more than 100 years.
Centennial Streamgages

Centennial Streamgages

Centennial Streamgages are USGS streamgages that have been in operation for more than 100 years.
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Integrated Water Science Basins: Willamette River

The Willamette River Basin reflects the conflicting water demands between humans and ecosystems—particularly salmon— and the challenge resource managers face throughout the Pacific Northwest.
Integrated Water Science Basins: Willamette River

Integrated Water Science Basins: Willamette River

The Willamette River Basin reflects the conflicting water demands between humans and ecosystems—particularly salmon— and the challenge resource managers face throughout the Pacific Northwest.
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Water-Quality Benchmarks for Contaminants

How does the water quality measure up? It all depends on what the water will be used for and what contaminants are of interest. Water-quality benchmarks are designed to protect drinking water, recreation, aquatic life, and wildlife. Here you’ll find links to some of the most widely used sets of water, sediment, and fish tissue benchmarks and general guidance about their interpretation.
Water-Quality Benchmarks for Contaminants

Water-Quality Benchmarks for Contaminants

How does the water quality measure up? It all depends on what the water will be used for and what contaminants are of interest. Water-quality benchmarks are designed to protect drinking water, recreation, aquatic life, and wildlife. Here you’ll find links to some of the most widely used sets of water, sediment, and fish tissue benchmarks and general guidance about their interpretation.
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USGS Streamgages By the Numbers

Get the facts and figures about the USGS Streamgaging Network, one of the largest streamgaging enterprises in the world!
USGS Streamgages By the Numbers

USGS Streamgages By the Numbers

Get the facts and figures about the USGS Streamgaging Network, one of the largest streamgaging enterprises in the world!
Learn More
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