Heather M Bragg
Heather Bragg is a hydrologic technician at the USGS Oregon Water Science Center.
Science and Products
Filter Total Items: 32
Initial fluvial response to the removal of Oregon's Marmot Dam Initial fluvial response to the removal of Oregon's Marmot Dam
A temporary, 14‐meter‐high earthen cofferdam standing in place of Marmot Dam was breached on 19 October 2007, allowing the 80‐ kilometer‐long Sandy River to flow freely from Mount Hood, Oreg., to the Columbia River for the first time in nearly 100 years. Marmot Dam is one of the largest dams in the western United States (in terms of height and volume of stored sediment) to have been...
Authors
Jon J. Major, Kurt R. Spicer, Abagail Rhode, J. E. O’Connor, Heather M. Bragg, Dwight Q. Tanner, Chauncey W. Anderson, J. Rose Wallick, Gordon E. Grant
Total dissolved gas and water temperature in the lower Columbia River, Oregon and Washington, 2008: Quality-assurance data and comparison to water-quality standards Total dissolved gas and water temperature in the lower Columbia River, Oregon and Washington, 2008: Quality-assurance data and comparison to water-quality standards
Significant Findings When water is released through the spillways of dams, air is entrained in the water, increasing the downstream concentration of dissolved gases. Excess dissolved-gas concentrations can have adverse effects on freshwater aquatic life. The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers, collected dissolved-gas and water-temperature...
Authors
Dwight Q. Tanner, Heather M. Bragg, Matthew W. Johnston
Suspended-Sediment Loads and Yields in the North Santiam River Basin, Oregon, Water Years 1999-2004 Suspended-Sediment Loads and Yields in the North Santiam River Basin, Oregon, Water Years 1999-2004
The North Santiam River provides drinking water to the residents and businesses of the city of Salem, Oregon, and many surrounding communities. Since 1998, water-quality data, including turbidity, were collected continuously at monitoring stations throughout the basin as part of the North Santiam River Basin Turbidity and Suspended Sediment Study. In addition, sediment samples have been...
Authors
Heather M. Bragg, Steven Sobieszczyk, Mark A. Uhrich, David R. Piatt
Major Turbidity Events in the North Santiam River Basin, Oregon, Water Years 1999-2004 Major Turbidity Events in the North Santiam River Basin, Oregon, Water Years 1999-2004
Multiple high-turbidity events with values greater than 250 Formazin Nephelometric Units occurred in streams of the North Santiam River basin during water years 1999-2004. By using a combination of field reconnaissance, aerial photography, and geographic information systems, eight of these high-turbidity events were investigated and linked to at least one likely source area and became...
Authors
Steven Sobieszczyk, Mark A. Uhrich, Heather M. Bragg
Modeling Hydrodynamics, Water Temperature, and Suspended Sediment in Detroit Lake, Oregon Modeling Hydrodynamics, Water Temperature, and Suspended Sediment in Detroit Lake, Oregon
Detroit Lake is a large reservoir on the North Santiam River in west-central Oregon. Water temperature and suspended sediment are issues of concern in the river downstream of the reservoir. A CE-QUAL-W2 model was constructed to simulate hydrodynamics, water temperature, total dissolved solids, and suspended sediment in Detroit Lake. The model was calibrated for calendar years 2002 and...
Authors
Annett B. Sullivan, Stewart A. Rounds, Steven Sobieszczyk, Heather M. Bragg
Total dissolved gas and water temperature in the lower Columbia River, Oregon and Washington, 2007: Quality-assurance data and comparison to water-quality standards Total dissolved gas and water temperature in the lower Columbia River, Oregon and Washington, 2007: Quality-assurance data and comparison to water-quality standards
Significant Findings When water is released through the spillways of dams, air is entrained in the water, increasing the downstream concentration of dissolved gases. Excess dissolved-gas concentrations can have adverse effects on freshwater aquatic life. The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers, collected dissolved-gas and water-temperature...
Authors
Dwight Q. Tanner, Heather M. Bragg, Matthew W. Johnston
Science and Products
Filter Total Items: 32
Initial fluvial response to the removal of Oregon's Marmot Dam Initial fluvial response to the removal of Oregon's Marmot Dam
A temporary, 14‐meter‐high earthen cofferdam standing in place of Marmot Dam was breached on 19 October 2007, allowing the 80‐ kilometer‐long Sandy River to flow freely from Mount Hood, Oreg., to the Columbia River for the first time in nearly 100 years. Marmot Dam is one of the largest dams in the western United States (in terms of height and volume of stored sediment) to have been...
Authors
Jon J. Major, Kurt R. Spicer, Abagail Rhode, J. E. O’Connor, Heather M. Bragg, Dwight Q. Tanner, Chauncey W. Anderson, J. Rose Wallick, Gordon E. Grant
Total dissolved gas and water temperature in the lower Columbia River, Oregon and Washington, 2008: Quality-assurance data and comparison to water-quality standards Total dissolved gas and water temperature in the lower Columbia River, Oregon and Washington, 2008: Quality-assurance data and comparison to water-quality standards
Significant Findings When water is released through the spillways of dams, air is entrained in the water, increasing the downstream concentration of dissolved gases. Excess dissolved-gas concentrations can have adverse effects on freshwater aquatic life. The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers, collected dissolved-gas and water-temperature...
Authors
Dwight Q. Tanner, Heather M. Bragg, Matthew W. Johnston
Suspended-Sediment Loads and Yields in the North Santiam River Basin, Oregon, Water Years 1999-2004 Suspended-Sediment Loads and Yields in the North Santiam River Basin, Oregon, Water Years 1999-2004
The North Santiam River provides drinking water to the residents and businesses of the city of Salem, Oregon, and many surrounding communities. Since 1998, water-quality data, including turbidity, were collected continuously at monitoring stations throughout the basin as part of the North Santiam River Basin Turbidity and Suspended Sediment Study. In addition, sediment samples have been...
Authors
Heather M. Bragg, Steven Sobieszczyk, Mark A. Uhrich, David R. Piatt
Major Turbidity Events in the North Santiam River Basin, Oregon, Water Years 1999-2004 Major Turbidity Events in the North Santiam River Basin, Oregon, Water Years 1999-2004
Multiple high-turbidity events with values greater than 250 Formazin Nephelometric Units occurred in streams of the North Santiam River basin during water years 1999-2004. By using a combination of field reconnaissance, aerial photography, and geographic information systems, eight of these high-turbidity events were investigated and linked to at least one likely source area and became...
Authors
Steven Sobieszczyk, Mark A. Uhrich, Heather M. Bragg
Modeling Hydrodynamics, Water Temperature, and Suspended Sediment in Detroit Lake, Oregon Modeling Hydrodynamics, Water Temperature, and Suspended Sediment in Detroit Lake, Oregon
Detroit Lake is a large reservoir on the North Santiam River in west-central Oregon. Water temperature and suspended sediment are issues of concern in the river downstream of the reservoir. A CE-QUAL-W2 model was constructed to simulate hydrodynamics, water temperature, total dissolved solids, and suspended sediment in Detroit Lake. The model was calibrated for calendar years 2002 and...
Authors
Annett B. Sullivan, Stewart A. Rounds, Steven Sobieszczyk, Heather M. Bragg
Total dissolved gas and water temperature in the lower Columbia River, Oregon and Washington, 2007: Quality-assurance data and comparison to water-quality standards Total dissolved gas and water temperature in the lower Columbia River, Oregon and Washington, 2007: Quality-assurance data and comparison to water-quality standards
Significant Findings When water is released through the spillways of dams, air is entrained in the water, increasing the downstream concentration of dissolved gases. Excess dissolved-gas concentrations can have adverse effects on freshwater aquatic life. The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers, collected dissolved-gas and water-temperature...
Authors
Dwight Q. Tanner, Heather M. Bragg, Matthew W. Johnston