Heather M Bragg
Heather Bragg is a hydrologic technician at the USGS Oregon Water Science Center.
Science and Products
Reservoir evolution, downstream sediment transport, downstream channel change, and synthesis of geomorphic responses of Fall Creek and Middle Fork Willamette River to water years 2012–18 streambed drawdowns at Fall Creek Lake, Oregon
Executive SummaryChapter A. IntroductionFall Creek Dam impounds Fall Creek Lake, a 10-kilometer-long reservoir in western Oregon and is operated by the U.S. Army Corps of Engineers (USACE) primarily for flood-risk management (or flood control) in late autumn through early spring months, as well as for water quality, irrigation, recreation, and habitat in late spring through early autumn. Since 201
Authors
Mackenzie K. Keith, J. Rose Wallick, Liam N. Schenk, Laurel E. Stratton Garvin, Gabriel W. Gordon, Heather M. Bragg
Sediment transport, turbidity, and dissolved oxygen responses to annual streambed drawdowns for downstream fish passage in a flood control reservoir
Sediment transport, turbidity, and dissolved oxygen were evaluated during six consecutive water years (2013–2018) of drawdowns of a flood control reservoir in the upper Willamette Valley, Oregon, USA. The drawdowns were conducted to allow volitional passage of endangered juvenile chinook salmon through the dam's regulating outlets by lowering the reservoir elevation to a point where the historical
Authors
Liam N. Schenk, Heather M. Bragg
Monitoring the effect of deep drawdowns of a flood control reservoir on sediment transport and dissolved oxygen, Fall Creek Lake, Oregon
Annual reservoir drawdowns at Fall Creek Lake, Oregon, have occurred for eight consecutive years from December 2012 to November 2019. The annual drawdowns are the result of the 2008 Biological Opinion of the US Army Corps of Engineers (USACE) Willamette Valley Project operations, which directed the USACE to carry out interim operational measures that would provide volitional downstream passage for
Authors
Liam N. Schenk, Heather M. Bragg
Water-quality monitoring during reservoir drawdowns
The USGS is monitoring water-quality above, within, and below Middle Fork Willamette and the South Santiam River dams to understand how reservoir drawdowns influence downstream water-quality conditions.
Willamette River Basin Dissolved Gas Monitoring Network
USGS total dissolved gas (TDG) data help guide spill and discharge management from dams operated along tributaries of the Willamette River.
Lower Columbia River Dissolved Gas Monitoring Network
USGS total dissolved gas (TDG) data help guide spill and discharge management from dams operated along the lower Columbia River.
North Santiam River Basin Study
The streamflow and water-quality conditions monitored by the USGS in the North Santiam River basin provide valuable information to water resource managers
Science and Products
Reservoir evolution, downstream sediment transport, downstream channel change, and synthesis of geomorphic responses of Fall Creek and Middle Fork Willamette River to water years 2012–18 streambed drawdowns at Fall Creek Lake, Oregon
Executive SummaryChapter A. IntroductionFall Creek Dam impounds Fall Creek Lake, a 10-kilometer-long reservoir in western Oregon and is operated by the U.S. Army Corps of Engineers (USACE) primarily for flood-risk management (or flood control) in late autumn through early spring months, as well as for water quality, irrigation, recreation, and habitat in late spring through early autumn. Since 201
Authors
Mackenzie K. Keith, J. Rose Wallick, Liam N. Schenk, Laurel E. Stratton Garvin, Gabriel W. Gordon, Heather M. Bragg
Sediment transport, turbidity, and dissolved oxygen responses to annual streambed drawdowns for downstream fish passage in a flood control reservoir
Sediment transport, turbidity, and dissolved oxygen were evaluated during six consecutive water years (2013–2018) of drawdowns of a flood control reservoir in the upper Willamette Valley, Oregon, USA. The drawdowns were conducted to allow volitional passage of endangered juvenile chinook salmon through the dam's regulating outlets by lowering the reservoir elevation to a point where the historical
Authors
Liam N. Schenk, Heather M. Bragg
Monitoring the effect of deep drawdowns of a flood control reservoir on sediment transport and dissolved oxygen, Fall Creek Lake, Oregon
Annual reservoir drawdowns at Fall Creek Lake, Oregon, have occurred for eight consecutive years from December 2012 to November 2019. The annual drawdowns are the result of the 2008 Biological Opinion of the US Army Corps of Engineers (USACE) Willamette Valley Project operations, which directed the USACE to carry out interim operational measures that would provide volitional downstream passage for
Authors
Liam N. Schenk, Heather M. Bragg
Water-quality monitoring during reservoir drawdowns
The USGS is monitoring water-quality above, within, and below Middle Fork Willamette and the South Santiam River dams to understand how reservoir drawdowns influence downstream water-quality conditions.
Willamette River Basin Dissolved Gas Monitoring Network
USGS total dissolved gas (TDG) data help guide spill and discharge management from dams operated along tributaries of the Willamette River.
Lower Columbia River Dissolved Gas Monitoring Network
USGS total dissolved gas (TDG) data help guide spill and discharge management from dams operated along the lower Columbia River.
North Santiam River Basin Study
The streamflow and water-quality conditions monitored by the USGS in the North Santiam River basin provide valuable information to water resource managers