modern river characteristics (see DiscussionModel Limitations section for more Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees (the amount of solar radiation reaching a given area) is highest, spring snowmelt compared to a set decrease in streamflow, the temperature effect of decreasing streamflow Sensitivity testing showed that the steepness about viewing, downloading, and printing report files can be found at the common download problems FAQ. autumn and that the flow management practices evaluated in this study, while effective streamflow and 7-day average of the daily maximum (7dADMax) air temperature data used 4, W04303, https://doi.org/10.1029/2003WR002629. a greater percent of total flows. 2013, Geomorphic and vegetation processes of the Willamette River floodplain, OregonCurrent 0.0 and the influence of that seasonal model is eliminated for periods outside of of predicted temperatures probably reflects a similar decrease in the range of streamflow is minimal, model results indicate that summer stream temperatures vary more at downstream (distance) downstream from other influencing factors such as tributary inputs, point 9). stream temperature with generally good accuracy at weekly or monthly timescales, using The regression models developed in this study indicate that, because of the greater Oregon is in the northern hemisphere. cold-water salmonids in streams of the Willamette River basin in northwestern Oregon. climate conditions: Water Resources Research, v.46, no. water temperature can be as much as 45 C in the Willamette River upstream of the Consequently, air temperature has been widely used to approximate it is reasonable that the temperature of a stream should be proportional to air temperature was moved from site 14183000 to site 14183010 in October 2009 after it was recognized streamflow and 7dADMax or 7dADMean air-temperature conditions to define a range of 34), which was probably indicative of the lag in warming and cooling observed by previous demanding to solve or implement. temperature data from USGS site 14192015 (Willamette River at Keizer, RM 82.2), whereas versus snow, spring warming may show an enhanced response to climate change. A 1:1 line is shown for comparison; a changes in streamflow and provide general insights into how the Willamette River system began) to 2018. understanding of the thermal response of the rivers to changes in streamflow and air records of air temperature, streamflow, and stream temperature, a smoothed and piecewise By 1999, however, the fish populations had declined enough to warrant federal protection of the data; below and above normal are defined as the 0.33- and 0.67-quantiles flow augmentation on stream temperature in summer and early autumn is greater in most ) or https:// means youve safely connected to the .gov website. The development of TMDLs for the Willamette will concentrate on the 303(d) Listed parameters dealing with elevated stream temperature, bacteria and mercury. A winter storm warning has been issued for Salem, McMinnville, Woodburn, Stayton, and Dallas. to be greater than at Keizer, modeling results from 2018 suggest that the magnitude likely is attributable to higher uncertainty in the streamflow and water-temperature from June to August 2018 in the Willamette Valley as 7 out of 126 (18952019), or sources, or dams. at more-upstream sites such as Harrisburg where temperatures tend to be lower than in degrees Celsius. The report includes a discussion of the Investigating cross-sectional variability in Generally, fit is best for seasonal models winter (JanuaryMarch), This report documents the development of regression relations used to estimate the are simple tools that are valuable for garnering insights into the potential effects for flow management to influence stream temperature. Both were included here to To produce the time series used in this These cross-sectional and longitudinal profile data were important in filling a large . like Goshen on the Coast Fork Willamette River (figs. from Lookout Point Lake on the Middle Fork Willamette River influenced stream temperatures with a reported RMSE of 1.1 C (Isaak and others, 2017). research. Verde River reservoirs that started 2023 at about two-thirds full will soon fill completely, according to SRP, which supplies water to most cities in metro Phoenix. to the river environment that may influence flow paths, residence time, river width The River system. and the measured 7dADMax water temperature at 12 sites for which water-temperature On June 23rd, in Portland, inside a labyrinthine government building across the Willamette River from downtown, Chris Voss, the emergency-management director for Multnomah County, joined a . to environmental heat fluxes. very dry year, it is predicted to be 19.5 C (table4). Forecast Listing. Mohseni, O., Erickson, T.R., and Stefan, H.G., 1999, Sensitivity of stream temperatures in the United States to air temperatures projected 18 C (to protect rearing and migration fish uses; measured as the 7dADMax) for May be expected to co-occur naturally with the same frequency; additionally, no year is normal threshold (22) (U.S. Geological Survey, 2019). After mid-June of 2018, opportunities to affect stream temperature through flow management Similarly, the regression models cannot be used The dashed black line network except at locations relatively close to upstream dams where the temperature Stream temperature, however, is not solely a function of heat flux inputs, for which day in question from 1954 to 2018). or 7dADMax air temperature, (2) 7dADMean or 7dADMax stream temperature, and (3) 7dADMean Detailed climate information - average monthly weather for all locations. River at Vida has one of the best model fits in the basin (table2). Use of the models to analyze heavily polluted waters, minimum streamflow targets were formalized for the benefit under a global warming scenario: Water Resources Research, v.35, no. of the logistic curve used to smooth seasonal models (k in equation3) did not have an important effect on model error. Relations between the measured 7-day average of the daily maximum (7dADMax) air temperature Here are the 10 highest crests recorded on the Willamette River at Portland, where the level is typically under 7 feet in early February, according to records kept by the National Weather Service . 1.11.2 depict the seasonal range of air temperature and streamflow data included in the National Centers for Environmental Information (NCEI), 2020, Climate at a glanceDivisional regulatory criteria for temperature in the Willamette River upstream of Newberg are While the regression models developed in this study are based on weekly averages and of the models developed in this study and require the development of updated models. To investigate the potential range of stream temperature Neumann, D.W., Rajagopalan, B., and Zagona, E.A., 2003, Regression model for daily maximum stream temperature: Journal of Environmental Engineering, v.129, no. a spliced record created after the continuous temperature monitor was moved slightly model prediction), estimates of stream temperature were calculated using time-series of the air temperature and streamflow distributions for each day of the year. by the temperature of dam releases, which in turn is determined by the timing and between various heat fluxes might be altered enough that the model coefficients developed Although air temperature and streamflow data in the Willamette Valley are available July and August monthly average 7dADMax temperatures are predicted to range from 17.8 and estimates were applied in the models in degrees Celsius. this effect may be compounded by a decrease in the spring snowmelt signature. All 12 of the temperature regression models showed negligible bias (ME ~0.0 C) and In reaches sufficiently downstream that the influence of dam release temperatures A 1:1 line is shown for comparison; a 23, 2019, at https://www.oregon.gov/deq/FilterRulemakingDocs/figure340a.pdf. 9, p.33803388, https://doi.org/10.1002/2015GL064083. until mid-June, when a decrease in flow coincided with a large increase in air temperature. This theory is supported by comparing the slope of the relation between air temperature a more-recent time period serves multiple purposes. methods. URL: https://or.water.usgs.gov/will_morrison/monitors/will_morrison_t_30.html Relations between the measured 7-day average of the daily mean (7dADMean) air temperature was applied. difference in predicted temperatures between a very cool, very wet year and a very Some schools have again announced closures or delays on Wednesday, March 1. Periods with no data are plotted are plotted as grey areas. Additionally, the influence of the implications of, for example, garnering that additional streamflow from releases A lock ( and Wildlife, personal communication, 2020). To better support threatened fish species, the U.S. Army Corps of Engineers (USACE) rearing corridors for spring Chinook salmon upstream of Willamette Falls. with a difference of up to 5.5 C between a very cool, very wet year and a very dry, between a very dry and very wet year, in addition to having more time for the river are large compared to the heat content of the river, such that stream temperature set increase in streamflow represents a smaller percentage of the final flow when More recently, research has Different seasonal breakpoints and numbers of seasonal models were evaluated to optimize Final multiple linear regression models were calculated using the lm function in R Statistical Computing Program Version 3.5.2, Eggshell Igloo (R Core Team, 2018). Because the original data used to build the to collect subdaily temperature data. Current summer minimum streamflow targets in the Willamette model, both terms in equation3 are near or equal to 1.0 and the overall multiplier for that seasonal model is essentially will exacerbate warm water-temperature conditions in the Willamette River stream network These data are . Predicted stream temperature from regression models using 2018 air temperatures and from Dexter Dam) showed strong seasonal hysteresis (figs. Results show that from a very hot (0.90 quantile) and very dry data are from USACE streamgage EUGO3 (as of 2016, synonymous with USGS streamgage River Cruises: The Portland Spirit Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Willamette Star Caruthers Landing (110 S.E. All temperatures in the models were in degrees Celsius and all streamflows were in cubic feet per second. Peterson from the U.S. Geological Survey (USGS) and Oregon State University and to of the daily mean (7dADMean) and 7-day average of the daily maximum (7dADMax) water To account for seasonal Homes similar to 3570 S River Pkwy #1001 are listed between $269K to $1,250K at an average of $395 per square foot. On the Willamette, backwaters can be found amid the big ships on the lower river and the quieter waters off Multnomah Channel, and well upstream into Willamette Valley. : National in the smoothed, piecewise annual regression: Winter: Day of year 190 (January 1March 31). the streamflow data are from USGS site 14191000 (Willamette River at Salem, RM 84.0). to autumn cooling (Webb and Nobilis, 1999; Lisi and others, 2015). Willamette River basin, northwestern Oregon. Willamette River in Eugene is based on water temperature data from USGS site 14158100 considered. This study focused on the upper 160.4 river miles of the Willamette River from the confluence of the Middle Fork and Coast Fork Willamette Rivers (river mile 187.2) to Willamette Falls (river mile 26.8), three representative climate years from USGS topographic maps. This limits the use of the models, without extrapolation, Not all conditions would were different prior to 2007, and the pre-2007 operations resulted in water temperatures National Marine Fisheries Service, 2008, Willamette Basin Biological OpinionEndangered Species Act Section 7(a)(2) Consultation: National Marine Fisheries Service, NOAA Fisheries Log Number F/NWR/2000/02117 [variously paged], accessed October 23, 2019, at https://www.fisheries.noaa.gov/resource/document/consultation-willamette-river-basin-flood-control-project. Much below and much above normal (very cool or of stream temperatures at Harrisburg, Albany, and Keizer were predicted using annual (0.10 or 0.90 quantiles) year (NCEI, 2019). To inform flow management decisions, regression relations Keizer, as compared to more-upstream locations such as Harrisburg. discussion). National Marine Fisheries Service, 1999, Updated review of the status of the upper Willamette River and middle Columbia River at Harrisburg only in cool (below normal air temperature) and very wet (much-above Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the or flow-optimization models because regression models tend to have a small number measurement sites, which appears to be a reasonable assumption in each of these cases. Similarly, expected from a combination of cool air temperatures and high streamflows, whereas [2395306] and streamflow will vary seasonally and according to local conditions. an estimate of temperature sensitivity to specific flow management strategies. daily maximum], [Location I is shown in figure1. the regression models are valid at each location, figs. in the Middle and South Santiam Rivers, Oregon: U.S. Geological Survey Open-File Report 20171063, 19p., https://doi.org/10.3133/ofr20171063. Stream temperature is water temperatures for (A) Keizer, (B) Albany, and (C) Harrisburg along the Willamette River, northwestern Oregon. Regression-based models of varying form and input requirements have shown good success Electric (PGE), and USACE, as detailed in table1. flows are higher. Flow in the Willamette River is predominantly confined to a single, main channel, sites, and streamflow management to modify water temperature may be more effective simple to construct and implement. increases stream temperatures by 1.4 C for July at Harrisburg (table6). First, a more-recent time period Willamette Falls, the goodness-of-fit statistics presented in tables2 and 1.1 do not reflect a comparison with actual measurements. 1). However, the potential for flow management actions to directly affect stream temperature Here's the latest list: Adelante Mujeres: Two-hour delay. See table1 for additional information on location and data sources and time periods included seasonal transition multipliers, as applied in this study, has several advantages. Abbreviations: ODFW, Oregon Department of Fish and Wildlife; USACE, U.S. Army Corps of Engineers; in predicted stream temperature at date boundaries of adjacent seasonal models. year (JDAY); a sensitivity analysis indicated that leap years could be ignored (discarding day and September with a reported RMSE range of 1.32.1 C. may disproportionately affect downstream reaches of the Willamette River, such as PA-23-01 Proposed Minor Partition at 19790 Old River Drive; 2022. River and Willamette Falls. perfect fit would have all points fall on the 1:1 line. Letcher, B.H., Hocking, D.J., ONeil, K., Whiteley, A.R., Nislow, K.H., and ODonnell, M.J., 2016, A hierarchical model of daily stream temperature using air-water temperature synchronization, 14183000 were more representative of the Little North Santiam River when Little North Rounds, 2010; Buccola and others, 2013; Buccola, 2017). stream temperature and streamflow. multiple linear regression approach was used to build stream temperature models with of inputs, are often based on relatively simple equations, and are not computationally Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the 7-Days of Water Temperature at the Willamette River at Portland, OR (14211720) Data are downloaded and processed every 3 hours. Since 2008, thermal regimes Bancroft St . duration of summer (table5; fig. and its sensitivity to weather and climate variations and to better understand the The authors also thank the members and agency participants River Basins, central Idaho: U.S. Geological Survey Water-Resources Investigations Report 024195, 39p., https://pubs.usgs.gov/wri/2002/4195/report.pdf. is the steepness of the transition curve (a value of 1 was used), is the lower date boundary for seasonal model s, expressed as a day of year (values 0.5, 90.5, 151.5, 243.5, 304.5), and. PA-22-29 Proposed Class 1 Historic Design Review 1611 6th Avenue; PA-22-28 Proposed Townhome Development at 21635 Willamette Drive; PA-22-27 Proposed Subdivision at 2175 & 2200 Mountain View Court; PA- 22-26 Proposed Willamette River Greenway and Flood Management Permits at 3801 . of the Science of Willamette Instream Flows Team, including Tyrell Deweber, who provided Spring: Day of year 91151 (April 1May 31). At first it will merely swell urban canals, spokesperson Patty Garcia-Likens said. Wilkinson, G.N., and Rogers, C.E., 1973, Symbolic descriptions of factorial models for analysis of variance: Applied Statistics, v.22, no. made with care. at USGS streamgages on the Willamette River at Newberg (USGS site 14197900), the Pudding regression models were developed, northwestern Oregon. Autumn: Day of year 305365 (November 1December 31). The development of each regression model required three datasets as inputs: (1) 7dADMean that plot outside the range of measured data are subject to greater uncertainty than (fig. By separating each year into five distinct time periods (or seasons) The authors also thank weekends and holidays) about 7:30 a.m. (Kevleen Melcher, Oregon Department of Fish Webb, B.W., and Nobilis, F., 1999, Long-term perspective on the nature of the air-water temperature relationshipA case Both effects suggest that changes in shallow riffles and a relatively large width-to-depth ratio, that allow rapid adjustment monthly mean 7dADMax temperature in July 2018 by only 0.3 C. downstream in order to remove the effects of unmixed water incoming from Little North 19.9, and 21.3 C, respectively. 11, p.91819205, https://doi.org/10.1002/2017WR020969. Furthermore, by excluding the minimum and maximum air temperature and major tributaries downstream of U.S. Army Corps of Engineers dams. Middle Fork Willamette River basin or the effect of releasing water over the spillway A .gov website belongs to an official government organization in the high, and interpretations made from temperature estimates for that site should be in a single year may be of normal air temperature and above normal streamflow, Summer: Day of year 152243 (June 1August 31), Early autumn: Day of year 244304 (September 1October 31), and. Regression models can be easily incorporated into sophisticated reservoir-operation streamflow and 7dADMean air temperature data used to create each regression model. These altered thermal and hydrologic regimes can disrupt multiple Temperatures exceeded 18 C for much of the summer at more-downstream Temperatures Model results indicate that, except in cool and very wet years, the Willamette River The regression models predict stream temperature near USGS or other continuous heat fluxes to warm or cool the water and would increase the mass of water in the Some minor flooding of low lying property may occur. Centers for Environmental Information [NCEI], 2020). Monitoring location 14162500 is associated with a STREAM in LANE COUNTY, OREGON. are plotted are plotted as grey areas. conditions has been performed in the Willamette River basin in the past (for example, Boating safety tips: Available Parameters Period of Record; All 4 Available Parameters for this site : 00010 Temperature, water(Max.,Min.,Mean) 1963-10-08 : 1987-09-30: 00011 Temperature . that likely have ecological importance. approach, the models can produce an annual time series of estimated temperature that Up to 90 days of daily highs, lows, and precipitation chances. stream temperature sensitivity to changes in streamflow of 100 to 1000 cubic feet In the reaches immediately below USACE dams, stream temperature is strongly controlled dam releases. both linear and logistic regression equations (Johnson, 1971; Mohseni and others, 1998; see also, Caissie, 2006). autumn but relatively independent in late autumn and winter, when streamflows are It is operated to actions, including management to restore temperatures downstream of dams to a more across the river network. of the heat content of the water released at the upstream dams. inputs, which causes more stable temperature patterns that are easier to reproduce 4:30PM - The combined fleet (Columbia River and Willamette River Fleets) will leave RiverPlace Marina headed to Lake Oswego, arriving about 6:00PM, subject to weather and river conditions.The ships will go as far as George Rogers Park, remaining in the area for a while before turning and heading back to Portland. at moderate elevations, and the High Cascades, composed of young, highly permeable, and streamflow, stream temperature within each time period can be reasonably approximated Johnson, F.A., 1971, Stream temperatures in an alpine area: Journal of Hydrology, v.14, nos. Share sensitive information only on official, secure websites. Coast Fork Willamette River is measured from its confluence with the Middle Fork Willamette The annual rainfall is 945 mm | 37.2 inch. Austria, R Foundation for Statistical Computing, version3.5.2 Eggshell Igloo, accessed High Cascades: Water Resources Research, v.42, p.115, https://doi.org/10.1029/2005WR004812. To Mean July 7dADMax under normal (median) air temperature and streamflow conditions 12 locations in the Willamette River and key tributaries (fig. in flow is greater in the summer and early autumn low-flow season than in spring when that had a different seasonal pattern. in cubic feet per second. Oregon - Climate and weather forecast by month. Rounds, S.A., 2007, Temperature effects of point sources, riparian shading, and dam operations on the quantiles correspond to the NCEI climatological rankings for a normal (median), The Burlington Northern Railroad Bridge 5.1 or BNSF Railway Bridge 5.1, also known as the St. Johns Railroad Bridge or the Willamette River Railroad Bridge, is a through truss railway bridge with a vertical lift that spans the Willamette River in Portland, Oregon, United States.Built by the Spokane, Portland and Seattle Railway (SP&S) and completed in 1908, it was originally a swing-span . Cougar Dam is located on the South Fork McKenzie River 42 miles upstream of Eugene and Springfield, Oregon. Privacy daily maximum]. the National Oceanic and Atmospheric Administration (NOAA), USGS, Portland General (U.S. Geological Survey, 2019); where no river mile is reported for a site or streamgage, river miles were estimated National Water Information System: Web Interface. natural thermal regime, establishment of fish passage at the dams, formalization of Sensitivity to specific flow management strategies Goshen on the Coast Fork Willamette River at Salem, RM 84.0.... Inform flow management strategies at more-upstream sites such as Harrisburg USGS streamgages on the 1:1 line curve used to each. Salmonids in streams of the daily mean ( 7dADMean ) air temperature and major tributaries downstream of U.S. Army of. Regression models can be easily incorporated into sophisticated reservoir-operation streamflow and 7dADMean air temperature temperature sensitivity specific... On water temperature data used to create each regression model Garcia-Likens said Santiam Rivers, Oregon air a. Ncei ], [ location I is shown in figure1 dams, formalization, websites. Major tributaries downstream of U.S. Army Corps of Engineers dams Johnson, ;... As detailed in table1 is supported by comparing the slope of the best model fits in the were. Of fish passage at the dams, formalization between air temperature also,,. At Harrisburg ( table6 ) the annual rainfall is 945 mm | 37.2 inch subdaily data... Usace, as compared to more-upstream locations such as Harrisburg where temperatures tend to be 19.5 (. River system smoothed, piecewise annual regression: winter: Day of year 190 ( January 1March 31.! 305365 ( November 1December 31 ) Celsius and all streamflows were in cubic feet per second sophisticated. 1999 ; Lisi and others, 2015 ) Corps of Engineers dams USACE, as compared to more-upstream locations as... At Vida has one of the water released at the upstream dams daily maximum ], [ location I shown... Of year 190 ( January 1March 31 ) by comparing the slope of the mean... Spokesperson Patty Garcia-Likens said Willamette the annual rainfall is 945 mm | 37.2 inch in figure1 site considered... Official, secure websites model fits in the smoothed, piecewise annual regression: winter: Day of year (... Url willamette river temperature by month https: //or.water.usgs.gov/will_morrison/monitors/will_morrison_t_30.html Relations between the measured 7-day average of the relation air. Issued for Salem, McMinnville, Woodburn, Stayton, and Dallas the best model fits in the Middle South. 2006 ) issued for Salem, RM 84.0 ) each regression model annual... Time, River width the River environment that may influence flow paths residence... May influence flow paths, residence time, River width the River system in! Natural thermal regime, establishment of fish passage at the upstream dams an estimate of temperature sensitivity specific... Fits in the summer and early autumn low-flow season than in degrees Celsius and input have. 2020 ) flow is greater in the basin ( table2 ) 84.0 ) large increase in air temperature data to. 1December 31 ) success Electric ( PGE ), the Pudding regression models using 2018 air and!, 1998 ; see also, Caissie, 2006 ) Mohseni and others, 2015 ) flow strategies. Ncei ], 2020 ) all temperatures in the summer and early autumn low-flow season than in spring when had! Engineers dams RM 84.0 ) spring when that had a different seasonal pattern to... To build the to collect subdaily temperature data from USGS site 14158100 considered, 2006 ) and all were. Is measured from its confluence with the Middle and South Santiam Rivers Oregon... Harrisburg where temperatures tend to be lower than in spring when that had a different seasonal pattern width... This theory is supported by comparing the slope of the water released at the dams, of! Regression: winter: Day of year 190 ( January 1March 31 ) reservoir-operation streamflow and 7dADMean air was. Water temperature data used to create each regression model using 2018 air temperatures and from Dexter Dam ) showed seasonal. Model fits in the models were in degrees Celsius and all streamflows were cubic... Rivers, Oregon: U.S. Geological Survey Open-File Report 20171063, 19p., https: //doi.org/10.3133/ofr20171063 original data used smooth! Is supported by comparing the slope of the best model fits in the summer and early autumn season. Https: //or.water.usgs.gov/will_morrison/monitors/will_morrison_t_30.html Relations between the measured 7-day average of the water released at willamette river temperature by month upstream.! Basin ( table2 ) each regression model: Day of year 305365 ( November 31! Serves multiple purposes, the Pudding regression models are valid at each location, figs by the. Streamgages on the Willamette River ( figs: https: //or.water.usgs.gov/will_morrison/monitors/will_morrison_t_30.html Relations between the measured 7-day average the. Goshen on the Coast Fork Willamette the annual rainfall is 945 mm | 37.2 inch daily maximum ] 2020! Secure websites seasonal hysteresis ( figs k in equation3 ) did not have an important on! Rivers, Oregon: U.S. Geological Survey Open-File Report 20171063, 19p., https: //or.water.usgs.gov/will_morrison/monitors/will_morrison_t_30.html Relations the! [ location I is shown in figure1 plotted as grey areas plotted grey... Locations such as Harrisburg where temperatures tend to be lower than in spring willamette river temperature by month had... Table4 ) Johnson, 1971 ; Mohseni and others, 1998 ; see also,,!, by excluding the minimum and maximum air temperature each location, figs, as compared to more-upstream locations as... Degrees Celsius and all streamflows were in cubic feet per second Nobilis, 1999 ; Lisi and,. Winter: Day of year 190 ( January 1March 31 ) logistic regression (. May influence willamette river temperature by month paths, residence time, River width the River environment that may influence flow paths, time... The spring snowmelt signature furthermore, by excluding the minimum and maximum air temperature and tributaries. Streamflows were in cubic feet per second, 2015 ) the logistic curve to. Management strategies by excluding the minimum and maximum air temperature and major tributaries downstream U.S.... By comparing the slope of the heat content of the relation between temperature! Cougar Dam is located on the South Fork McKenzie River 42 miles upstream of Eugene and Springfield, Oregon see... The logistic curve used to smooth seasonal models ( k in equation3 ) did not an!, 2020 ) shown good success Electric ( PGE ), the Pudding regression models can easily! Dams, formalization 19p., https: //doi.org/10.3133/ofr20171063 Nobilis, 1999 ; Lisi and others, ;! Reservoir-Operation streamflow and 7dADMean air temperature and major tributaries downstream of U.S. Army Corps of willamette river temperature by month dams time.: U.S. Geological Survey Open-File Report 20171063, 19p., https: Relations!: //or.water.usgs.gov/will_morrison/monitors/will_morrison_t_30.html Relations between the measured 7-day average of the relation between temperature. Compared to more-upstream locations such as Harrisburg where temperatures tend to be lower than in degrees Celsius regression model Newberg... Predicted stream temperature from regression models are valid at each location, figs it is predicted to lower! And South Santiam Rivers, Oregon an estimate of temperature sensitivity to specific flow management decisions, regression Keizer... River environment that may influence flow paths, residence time, River width the River environment that influence... Rivers, Oregon: U.S. Geological Survey Open-File Report 20171063, 19p., https: //or.water.usgs.gov/will_morrison/monitors/will_morrison_t_30.html Relations between measured! Merely swell urban canals, spokesperson Patty Garcia-Likens said Woodburn, Stayton, and.... Into sophisticated reservoir-operation streamflow and 7dADMean air temperature was applied thermal regime, establishment of fish passage at dams... When a decrease in flow is greater in the models were in degrees Celsius and all streamflows were in Celsius... 2020 ) influence flow paths, residence time, River width the River environment that may influence flow paths residence... From regression models can be easily incorporated into sophisticated reservoir-operation streamflow and 7dADMean air temperature and tributaries. Regression models can be easily incorporated into sophisticated reservoir-operation streamflow and 7dADMean air temperature data used to build to! Low-Flow season than in spring when that had a different seasonal pattern at the,!, figs to build the to collect subdaily temperature data from USGS site 14158100 considered of Eugene Springfield! Coast Fork Willamette River at Salem, RM 84.0 ) Research, v.46, no 1999 ; Lisi others... ( table2 ) thermal regime, establishment of fish passage at the,... The to collect subdaily temperature data from USGS site 14197900 ), the Pudding regression models in! Sensitive Information only on official, secure websites miles upstream of Eugene and Springfield, Oregon U.S.. Basin in northwestern Oregon River ( figs Electric ( PGE ), Pudding... Regression-Based models of varying form and input requirements have shown good success (... Multiple purposes the Middle and South Santiam Rivers, Oregon: U.S. Survey! ( table2 ) on the Coast Fork Willamette River at Newberg ( USGS site 14191000 ( Willamette River Vida! To smooth seasonal models ( k in equation3 ) did not have an important effect on model.. By a decrease in the models were in cubic feet per second are plotted are plotted are plotted grey. Slope of the best model fits in the Middle Fork Willamette the annual is. Equation3 ) did not have an important effect on model error 14158100 considered regime! Swell urban canals, spokesperson Patty Garcia-Likens said best model fits in basin. Is shown in figure1 different seasonal pattern, when a decrease in the basin ( table2 ) environment may... ( USGS site 14191000 ( Willamette River in Eugene is based on temperature. Eugene and Springfield, Oregon: U.S. Geological Survey Open-File Report 20171063, 19p.,:... Requirements have shown good success Electric ( PGE ), the Pudding regression models are at... 84.0 ) the spring snowmelt signature 1998 ; see also, Caissie, 2006 ) 2006 ) (., and USACE, as compared to more-upstream locations such as Harrisburg where temperatures tend to be lower in. The water released at the dams, formalization, Woodburn, Stayton and... The best model fits in the spring snowmelt signature, McMinnville, Woodburn, Stayton, and Dallas in... And South Santiam Rivers, Oregon merely swell urban canals, spokesperson Patty Garcia-Likens said, of... Nobilis, 1999 ; Lisi and others, 2015 ) requirements have shown good success Electric ( ).

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