A mechanistic, biophysical water-quality model (CE–QUAL–W2) was developed and calibrated for Lake St. Croix, Wisconsin and Minnesota. The Lake St. Croix CE–QUAL–W2 model was simulated and calibrated using data collected from April through November 2013. Loads developed for the model were based on water-quality data collected by various agencies, including the U.S. Geological Survey (USGS). The calibrated model was used to evaluate good- and optimal-growth habitat availability for lake sturgeon using coldwater fish oxygen and thermal requirements, as part of the associated report, U.S. Geological Survey Scientific Investigations Report 2017-5157 (http://dx.doi.org/10.3133/SIR20175157).

A mechanistic, biophysical water-quality model (CE–QUAL–W2) was developed and calibrated for Lake St. Croix, Wisconsin and Minnesota. The Lake St. Croix CE–QUAL–W2 model was simulated and calibrated using data collected from April through November 2013. Loads developed for the model were based on water-quality data collected by various agencies, including the U.S. Geological Survey (USGS). The calibrated model was used to evaluate good- and optimal-growth habitat availability for lake sturgeon using coldwater fish oxygen and thermal requirements, as part of the associated report, U.S. Geological Survey Scientific Investigations Report 2017-5157 (http://dx.doi.org/10.3133/SIR20175157).

A hydrodynamic, water-temperature, and water-quality model (CE-QUAL-W2; Wells, 2020) of the Link-Keno reach of the Klamath River (Oregon) was used for calendar years 2006–15 to run a series of base and recirculation scenarios. These model runs were implemented to test alternative scenarios for routing some of the Klamath Straits Drain discharge into Ady Canal. The model scenarios were configured for baseline conditions and three different sets of recirculation scenarios, including the maximum year-round recirculation without discharge limits (scenario 1), limited year-round recirculation fixed by the current pipe flow configuration from Klamath Straits Drain into Ady Canal (scenario 2), and limited seasonal recirculation (May-September), also fixed by the current pipe flow configuration (scenario 3). For calendar years 2012–15, a separate CE-QUAL-W2 model for the Klamath Straits Drain was used in lieu of the Klamath Straits Drain as a tributary directly into the Link-Keno reach of the Klamath River CE-QUAL-W2 model. Original calibration and simulation of the Klamath Straits Drain model was documented in Sullivan and Rounds (2018). Original calibration and simulation of the Link-Keno reach of the Klamath River was documented in Sullivan and others (2011). These recirculation scenarios will be used by the United States Bureau of Reclamation to better understand the effects of recirculating Klamath Straits Drain discharge into Ady Canal on constituent loads of total nitrogen, total phosphorus, and the 5-day biochemical oxygen demand (BOD5).

A hydrodynamic, water-temperature, and water-quality model (CE-QUAL-W2; Wells, 2020) of the Link-Keno reach of the Klamath River (Oregon) was used for calendar years 2006–15 to run a series of base and recirculation scenarios. These model runs were implemented to test alternative scenarios for routing some of the Klamath Straits Drain discharge into Ady Canal. The model scenarios were configured for baseline conditions and three different sets of recirculation scenarios, including the maximum year-round recirculation without discharge limits (scenario 1), limited year-round recirculation fixed by the current pipe flow configuration from Klamath Straits Drain into Ady Canal (scenario 2), and limited seasonal recirculation (May-September), also fixed by the current pipe flow configuration (scenario 3). For calendar years 2012–15, a separate CE-QUAL-W2 model for the Klamath Straits Drain was used in lieu of the Klamath Straits Drain as a tributary directly into the Link-Keno reach of the Klamath River CE-QUAL-W2 model. Original calibration and simulation of the Klamath Straits Drain model was documented in Sullivan and Rounds (2018). Original calibration and simulation of the Link-Keno reach of the Klamath River was documented in Sullivan and others (2011). These recirculation scenarios will be used by the United States Bureau of Reclamation to better understand the effects of recirculating Klamath Straits Drain discharge into Ady Canal on constituent loads of total nitrogen, total phosphorus, and the 5-day biochemical oxygen demand (BOD5).

The U.S. Geological Survey (USGS), in cooperation with the St. Croix River Research Station – Science Museum of Minnesota, updated a previously developed CE-QUAL-W2 hydrodynamic and water-quality model of Madison Lake, Minnesota (Smith and others, 2017). The previous version simulated phytoplankton into four general algal communities or groups: (1) Bacillariophyta (diatoms) and Chrysophyta (chrysophytes); (2) Chlorophyta (green algae); (3) Cyanophyta (blue-green algae); and, (4) Haptophyta and Cryptophyta (flagellates). For the updated model, the Cyanophyta group (originally referred to as blue-green algae) has been divided into two groups: a nitrogen-fixing Cyanophyta group, generally representative of Anabaena, Dolichospermum, and Cylindrospermopsis, and a non-fixing, buoyant Cyanophyta group, generally representative of Planktothrix, Microcystis, and Woronichinia.

The U.S. Geological Survey (USGS), in cooperation with the St. Croix River Research Station – Science Museum of Minnesota, updated a previously developed CE-QUAL-W2 hydrodynamic and water-quality model of Madison Lake, Minnesota (Smith and others, 2017). The previous version simulated phytoplankton into four general algal communities or groups: (1) Bacillariophyta (diatoms) and Chrysophyta (chrysophytes); (2) Chlorophyta (green algae); (3) Cyanophyta (blue-green algae); and, (4) Haptophyta and Cryptophyta (flagellates). For the updated model, the Cyanophyta group (originally referred to as blue-green algae) has been divided into two groups: a nitrogen-fixing Cyanophyta group, generally representative of Anabaena, Dolichospermum, and Cylindrospermopsis, and a non-fixing, buoyant Cyanophyta group, generally representative of Planktothrix, Microcystis, and Woronichinia.

The Willamette Valley Project (WVP) is a system of revetments, fish hatcheries, and 13 dams in the Willamette Basin of northwestern Oregon that is operated by the U.S. Army Corps of Engineers to provide flood risk management, irrigation, power generation, water quality improvement, and recreational opportunities, among other authorized purposes. By reducing available habitat and altering the natural hydrologic and thermal regimes in the Willamette Basin, the WVP has negatively influenced native populations of anadromous fish, including spring-run Chinook salmon (Oncorhynchus tshawytscha) and winter-run steelhead (O. mykiss), which were designated as threatened under the Endangered Species Act of 1973 (Public Law 93–205, 87 Stat. 884, as amended) in 1999. CE-QUAL-W2, a two-dimensional, hydrodynamic water quality model, has been used to simulate and analyze the temperature of water released from key Willamette Valley Project dams. and the effect on river reaches downstream that might result from a variety of theoretical management scenarios. This data release includes input, output, and calibration files for CE-QUAL-W2 models of Hills Creek Lake and Hills Creek Dam, the Middle Fork Willamette River between Hills Creek Dam and Lookout Point Lake, Lookout Point Lake and Lookout Point Dam, Dexter Lake and Dexter Dam, Cougar Reservoir and Cougar Dam, Green Peter Lake and Green Peter Dam, Foster Lake and Foster Dam, Detroit Lake and Detroit Dam, and Big Cliff Lake and Big Cliff Dam. The models, built by other researchers in the early to-mid-2000s to simulate a disparate range of time periods, were upgraded to CE-QUAL-W2 version 4.2 with additional USGS modifications. Models are set up to run from January through December of 2011, 2015, and 2016 except where truncated for the purposes of model stability. CE-QUAL-W2 models in this data release can be combined with CE-QUAL-W2 river models of the Fall Creek and the Coast Fork Willamette, Middle Fork Willamette, Row, South Fork McKenzie, McKenzie, South Santiam, North Santiam, Santiam, and Willamette Rivers, documented in OFR 2022-1017 (see External Sources), to run model scenarios for an “integrated, basin-wide” model of the Willamette Valley Project.

The Willamette Valley Project (WVP) is a system of revetments, fish hatcheries, and 13 dams in the Willamette Basin of northwestern Oregon that is operated by the U.S. Army Corps of Engineers to provide flood risk management, irrigation, power generation, water quality improvement, and recreational opportunities, among other authorized purposes. By reducing available habitat and altering the natural hydrologic and thermal regimes in the Willamette Basin, the WVP has negatively influenced native populations of anadromous fish, including spring-run Chinook salmon (Oncorhynchus tshawytscha) and winter-run steelhead (O. mykiss), which were designated as threatened under the Endangered Species Act of 1973 (Public Law 93–205, 87 Stat. 884, as amended) in 1999. CE-QUAL-W2, a two-dimensional, hydrodynamic water quality model, has been used to simulate and analyze the temperature of water released from key Willamette Valley Project dams. and the effect on river reaches downstream that might result from a variety of theoretical management scenarios. This data release includes input, output, and calibration files for CE-QUAL-W2 models of Hills Creek Lake and Hills Creek Dam, the Middle Fork Willamette River between Hills Creek Dam and Lookout Point Lake, Lookout Point Lake and Lookout Point Dam, Dexter Lake and Dexter Dam, Cougar Reservoir and Cougar Dam, Green Peter Lake and Green Peter Dam, Foster Lake and Foster Dam, Detroit Lake and Detroit Dam, and Big Cliff Lake and Big Cliff Dam. The models, built by other researchers in the early to-mid-2000s to simulate a disparate range of time periods, were upgraded to CE-QUAL-W2 version 4.2 with additional USGS modifications. Models are set up to run from January through December of 2011, 2015, and 2016 except where truncated for the purposes of model stability. CE-QUAL-W2 models in this data release can be combined with CE-QUAL-W2 river models of the Fall Creek and the Coast Fork Willamette, Middle Fork Willamette, Row, South Fork McKenzie, McKenzie, South Santiam, North Santiam, Santiam, and Willamette Rivers, documented in OFR 2022-1017 (see External Sources), to run model scenarios for an “integrated, basin-wide” model of the Willamette Valley Project.

In the Willamette River Basin in northwestern Oregon, stream temperature has been altered by 13 dams operated by the U.S. Army Corps of Engineers (USACE), negatively influencing threatened populations of native salmonids. CE-QUAL-W2, a two-dimensional, hydrodynamic water quality model, has been used to investigate temperature and heat patterns in the Willamette River and the downstream effects of dam operations and other anthropogenic effects on heat and stream temperature. This data release includes the input and output files for six CE-QUAL-W2 models that include Fall Creek downstream of Fall Creek Dam, the Row River downstream of Dorena Dam, the Coast Fork Willamette River downstream of Cottage Grove Dam, the Middle Fork Willamette River downstream of Dexter Dam, the South Fork McKenzie River downstream of Cougar Dam, the McKenzie River downstream of the South Fork McKenzie River confluence, the South Santiam River downstream of Foster Dam, the North Santiam River downstream of Big Cliff Dam, the Santiam River, and the Willamette River as far downstream as Willamette Falls (river mile 26.8) near Oregon City. The models, built by other researchers in the early 2000s to simulate portions of 2001 and 2002, were upgraded to CE-QUAL-W2 version 4.2 with additional USGS modifications to trace heat, water sources, and provide additional outputs. Models are set up to run from late March through October of 2011, 2015, and 2016. Model scenarios documented in this data release were used to investigate the downstream impacts of flow augmentation from various upstream dams.

In the Willamette River Basin in northwestern Oregon, stream temperature has been altered by 13 dams operated by the U.S. Army Corps of Engineers (USACE), negatively influencing threatened populations of native salmonids. CE-QUAL-W2, a two-dimensional, hydrodynamic water quality model, has been used to investigate temperature and heat patterns in the Willamette River and the downstream effects of dam operations and other anthropogenic effects on heat and stream temperature. This data release includes the input and output files for six CE-QUAL-W2 models that include Fall Creek downstream of Fall Creek Dam, the Row River downstream of Dorena Dam, the Coast Fork Willamette River downstream of Cottage Grove Dam, the Middle Fork Willamette River downstream of Dexter Dam, the South Fork McKenzie River downstream of Cougar Dam, the McKenzie River downstream of the South Fork McKenzie River confluence, the South Santiam River downstream of Foster Dam, the North Santiam River downstream of Big Cliff Dam, the Santiam River, and the Willamette River as far downstream as Willamette Falls (river mile 26.8) near Oregon City. The models, built by other researchers in the early 2000s to simulate portions of 2001 and 2002, were upgraded to CE-QUAL-W2 version 4.2 with additional USGS modifications to trace heat, water sources, and provide additional outputs. Models are set up to run from late March through October of 2011, 2015, and 2016. Model scenarios documented in this data release were used to investigate the downstream impacts of flow augmentation from various upstream dams.