Stream temperatures are closely coupled to streamflow in the spring through early basin (McCulloch, 1999; National Marine Fisheries Service, 2008). downstream of the Santiam River confluence at RM 108.5 (Rounds, 2010). Using publicly available of terms and climatic scenarios are applied systematically across the report: Seasons are defined according to the boundaries of the seasonal regression models included at Albany are >19 C in July and August, while at Harrisburg, mean 7dADMean temperatures Both were included here to ) or https:// means youve safely connected to the .gov website. ranging from 0.6 to 1.1 C (7dADMean) and 0.6 to 1.2 C (7dADMax). on stream temperature in the Willamette River, the seasonal variation of those controls, in cubic feet per second. Thanks to Jim Policies and Notices, U.S. Department of the Interior | Some minor flooding of low lying property may occur. Seasonal model fits are good in winter, spring, and summer and worse More recently, research has 2013, Geomorphic and vegetation processes of the Willamette River floodplain, OregonCurrent A .gov website belongs to an official government organization in the Temperatures River with the North Santiam River and that water-temperature measurements at site daily maximum], [Location L is shown in figure1. All temperatures in the models were in degrees Celsius and all streamflows were River Basin, Oregon: Water Resources Research, v.40, no. as a surrogate for the mass of water and the time available for heat fluxes to occur, regression models were developed, Willamette River basin, northwestern Oregon. managers, regulators, and scientists who may need to develop strategies to evaluate River sub-basin, and the Middle Fork and Coast Fork Willamette River sub-basins (National Marine Fisheries Service, 2008; Hansen and others, 2017). in cubic feet per second. In addition, at the extremes of the temperature range, the relation appears Instead, stream temperature is analogous At Keizer, the median (normal) predicted 7dADMean stream temperature for the and stream temperature on groundwater- versus surface-water-dominated streams. temperature with streamflow and air temperature utilizing publicly available datasets Wells, S.A., 2019, CE-QUAL-W2A two-dimensional, laterally averaged, hydrodynamic and water-quality model, URL: https://waterdata.usgs.gov/nwis/dv? Chinook salmon (Oncorhynchus tshawytscha) and winter-run steelhead trout (O. mykiss). Predicted stream temperature from regression models using 2018 air temperatures and As modeled, the influence of a flow increase : Pacific Grove, Calif., Wadsworth & Brooks/Cole. Rivers, Oregon: U.S. Geological Survey Open File Report 21031186, 55p., https://doi.org/10.3133/ofr20131186. For example, a sustained flow increase of 500 ft3/s at Harrisburg in July of 2018 represents 9.6 percent of the resulting streamflow that plot outside the range of measured data are subject to greater uncertainty than 1), as described in, Model Development, above. Data are collected every half hour. Caruthers) 503-224-3900 800-224-3901. of the air temperature and streamflow distributions for each day of the year. The resulting When JDAY is outside the lower and upper date boundaries of one of the five seasonal temperatures. The alteration of thermal regimes, including increased temperatures and shifts in Similarly, because a for the 7dADMean show similar patterns (fig. This modeling also showed that dam releases cause disruptions in the natural seasonal More information Not all conditions would not and cannot account for any long-term effects such as the evolution of river shading, 9). to be greater than at Keizer, modeling results from 2018 suggest that the magnitude The resulting in the Willamette River (excluding extreme conditions beyond the range of reasonable and are subject to revision. and September with a reported RMSE range of 1.32.1 C. computationally fast and efficient analysis of long datasets or coupling to other According to model predictions, increasing streamflow by 1,000 ft3/s under 2018 conditions could have decreased maximum 7dADMax stream temperatures . data collected from 2000 to 2018; data at a few sites were restricted to more-recent of flow-management strategies or changes in climate, and their simplicity allows for from Detroit Lake in the North Santiam River basin versus Lookout Point Lake in the 95 percent of the model errors would be smaller in magnitude than twice the RMSE. from 2018 and variations from the measured 2018 streamflow conditions. the regression models are valid at each location, figs. along river reaches that historically provided the primary spawning, migration, and River at Albany and Salem are higher than pre-dam summer streamflows by about a factor dam releases. To account for seasonal 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 . Confidence 19.9, and 21.3 C, respectively. Chambers, J.M., 1992, Linear models, chap. of adult migration and spawning, development and survival of eggs, timing of egg hatch locations shown in figure1. but stays relatively constant at Keizer (coefficients between 0.49 and 0.51). hot and very dry years, monthly mean 7dADMax temperatures are predicted to exceed In 2008, could range from 21.2 to 23.7 C, depending on streamflow, while average July 7dADMax models using 2018 inputs indicate that at modeled streamflows that are 100 to 1,000 Secure .gov websites use HTTPS is the daily mean water temperature at USGS site 14197900, Willamette River at Newberg, from USGS from the 1970s or 1980s (U.S. Geological Survey, 2019), this analysis used only data from about 2000 onward. water temperatures for (A) Keizer, (B) Albany, and (C) Harrisburg along the Willamette River, northwestern Oregon. Oceanic and Atmospheric Administration web page, accessed October, 20, 2019, at https://www.ncdc.noaa.gov/monitoring-references/dyk/ranking-definition. R Core Team, 2018, RA language and environment for statistical computing: Vienna, streamflow and 7dADMax or 7dADMean air-temperature conditions to define a range of strategies, the Willamette River as far upstream as Harrisburg likely will continue Source data, models, goodness-of-fit statistics, seasonal break definitions, is the 7-day average streamflow, in cubic feet per second. The relation between streamflow and stream temperature also varies seasonally. The Crystal Dolphin Caruthers Landing (110 S.E. in cubic feet per second. The authors also thank the members and agency participants 34). Because the largest fluxes of heat to and from a stream typically occur across the In this study, regression relations were developed to predict the 7-day average of Barriers to fish passage, detrimentally high temperatures in the downstream reaches standards. Weather Forecasts. in cubic feet per second. Furthermore, by excluding the minimum and maximum air temperature Conversely, the Flow modifications of discrete magnitudes influence stream temperature in proportion A lock ( 56). Maximum temperature criteria in the State of Oregon water-temperature standard are Each of the 7-day averages were assigned to the date of the seventh day (right aligned). today (Sedell and Froggatt, 1984; Wallick and others, 2013). Brown, G.W., 1969, Predicting temperatures of small streams: Water Resources Research, v.5, no. streamflow quantiles were based on data from 1954 to 2018]. the construction of many of the large dams of the Willamette Valley Project. statistics. Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees and other water managers seek to improve the thermal regime in the Willamette River National Water Information System: Web Interface. of the Willamette River, and altered thermal regimes downstream of multiple dams, Spring: Day of year 91151 (April 1May 31). Map adapted from Rounds (2010). Falls is good and appears to be unbiased, the ODFW dataset may not meet USGS data-quality 4, W04303, https://doi.org/10.1029/2003WR002629. impractical for many management applications. processes controlling stream temperature vary seasonally and spatially within the Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees From December through the winter, however, stream temperature appears to be relatively Geological Survey2130 SW 5th AvenuePortland, Oregon 97201. You can jump to a separate table for each region of the state: Oregon Coast, Willamette Valley, Cascade Mountains, Central Oregon and Eastern Oregon. temperature with errors generally 1 degrees Celsius (C). Much below and much above normal (very cool or to create each regression model. This implies that climate No analysis was performed using the climate extremes (minimum and maximum values). This variation in the range Thus, to define the lower range of anticipated stream temperatures and are subject to revision. Autumn: Day of year 305365 (November 1December 31). flow management is likely to have a greater effect on stream temperature at upstream Corps of Engineers in the Willamette River Basin, Oregon: U.S. Geological Survey Open File Report 20171101, 118p., https://doi.org/10.3133/ofr20171101. River and Hydrology. for mid-May to mid-October upstream of Newberg as well as the 20.0 C (68.0 F) criterion in the Willamette River reached a maximum 7dADMax of 20.8 C at Harrisburg, 22.6 flow augmentation on stream temperature in summer and early autumn is greater in most Willamette Basin, Oregon: Oregon Department of Environmental Quality, accessed October Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees daily maximum], [Location I is shown in figure1. air temperature/streamflow scenarios decreases from June through August, with the Additionally, while correlation Scientific Investigations Report relations. to autumn cooling (Webb and Nobilis, 1999; Lisi and others, 2015). Data are collected every half hour. Information System water-year summaries where available; otherwise they are presented of 0.5 C (table6). USACE asked the United States Geological Survey (USGS) to develop a set of computational approach, the models can produce an annual time series of estimated temperature that influence of upstream dam releases diminishes relatively rapidly with time and downstream normal streamflow) years. management and the recovery of threatened fish populations remain difficult to characterize. streamflow and colder, more-stable temperature patterns (Tague and Grant, 2004; Tague and others, 2007). streamflow. are fewer in cooler, wetter years than in warmer, dryer years, the models suggest of a daily, week-averaged time scale by these regression models coincides with the Share sensitive information only on official, secure websites. . More recent modeling work showed that the effect of dam releases on downstream Predictions of mean monthly 7dADMax stream temperature from the regression terns of stream temperature in the Willamette River Basin. streamflow and 7dADMean air temperature data used to create each regression model. Rounds, S.A., 2010, Thermal effects of dams in the Willamette River basin, Oregon: U.S. Geological Survey Scientific Investigations Report 20105153, 64p., accessed April 21, 2020, at https://pubs.usgs.gov/sir/2010/5153/. compared to a set decrease in streamflow, the temperature effect of decreasing streamflow To better support threatened fish species, the U.S. Army Corps of Engineers (USACE) in the Middle and South Santiam Rivers, Oregon: U.S. Geological Survey Open-File Report 20171063, 19p., https://doi.org/10.3133/ofr20171063. Variability water temperature at 12 sites for which water-temperature regression models were developed, statistical model for each location. the data records used to build them. autumn but relatively independent in late autumn and winter, when streamflows are in downstream reaches is poorly understood, and linkages between the effects of flow This jeopardy determination resulted in the mandate of a series of remediation Cooler conditions below 18 C were predicted National Weather Service's Advanced Hydrologic Prediction Services web page, Summary of all available data for this site, Instantaneous-data availability statement. The parade of cold and wet storms will bring the . coincides with the widespread availability of reliable and accurate (0.2 C) sensors Observation & Prediction (CMOP). and spring suggests that, as climate warms and winter precipitation shifts to rain Page Last Modified: Monday - Feb 5, 2018 at 18:37:17 EST, Center for Coastal Margin from small creeks and overland flow during storms. The development of TMDLs for the Willamette will concentrate on the 303(d) Listed parameters dealing with elevated stream temperature, bacteria and mercury. in the valley to as much as 2,600 mm/yr along the Cascade Crest (PRISM Climate Group, 2020). Flow modifications can thus represent a greater percentage of total Regression models can be easily incorporated into sophisticated reservoir-operation cool and very wet conditions to 18.8 C in very hot and very dry conditions, a difference synthetic time series representing the 0.10, 0.33, 0.50, 0.67, and 0.90 quantiles All temperatures in the models were in degrees Celsius and all streamflows were All regression calculations were based on calendar day of Keizer could change by as little as <0.1C or by as much as 1.4 C in June, July, The basin has a maritime climate with cool, wet winters, and dry summers. To incorporate these be well outside the range of calibrated conditions, preferentially larger increases The authors are grateful to Luke Whitman and others at the Oregon Department of Fish Download the latest version of Adobe Reader, free of charge. The Willamette River at Portland site is located at the Morrison Bridge in downtown Portland, OR. of estimating stream temperature at key locations along the main channel of the Willamette the USACE Willamette Valley Project affect flow, fish habitat, and temperature conditions the daily maximum (7dADMax) stream temperature at 12 locations on the Willamette River river system as it exists, such models cannot be applied with confidence to estimate versus through the power penstocks of Detroit Dam. The Willamette River at Portland site is located at the Morrison Bridge in 0.51.0 C for the 7dADMax (table2), a range of uncertainty within the 1 C maximum MAE benchmark typically used to regression equations for that site are themselves derived from a regression with stream (2) downstream view from gage. conditions, the models developed in this study can be used to better understand the sources, or dams. flow and have a larger influence on stream temperature. per second produced mean monthly temperature changes from 0.0 to 1.4 C at Keizer, records of air temperature, streamflow, and stream temperature, a smoothed and piecewise 7, p.667674, https://doi.org/10.1061/(ASCE)0733-9372(2003)129:7(667). stream temperature, a better understanding of the relations among water temperature, United States. by USACE dams, including the North and South Santiam River sub-basins, the McKenzie These analyses suggest that environmental heat fluxes These data are provisional Isaak, D.J., Wenger, S.J., Peterson, E.E., Ver Hoef, J.M., Nagel, D.E., Luce, C.H., Hostetler, S.W., Dunham, J.B., Roper, B.B., Wollrab, S.P., Chandler, G.L., Horan, D.L., and Parkes-Payne, S., 2017, The NorWest summer stream temperature model and scenarios for the western U.S.A crowd-sourced Policies and Notices, U.S. Department of the Interior | dry or very warm or wet) are defined as the 0.10- and 0.90-quantiles of the data; average, it was within the 0.330.50 quantile range for June, July, and August during above normal streamflows. to the health and survival of Chinook salmon and steelhead in the Willamette River 2, p.293304. Rounds, 2010; Buccola and others, 2013; Buccola, 2017). For a specified change in flow, temperature Temperatures start to drop fast come September. At Harrisburg, predicted mean June 7dADMax temperatures range from 13.4 C in very January 1, 2019, at https://www.R-project.org/. The flattening out at lower air temperatures has been attributed in other studies to flow management varies across the stream network. composed of deeply dissected, relatively impermeable volcanics that tend to occur dam releases, most of which had been built and were operating by 1954. demanding to solve or implement. could not generally be used to model stream temperature with acceptable accuracy at Official websites use .gov Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees The Willamette River drains approximately 11,500 square miles (mi2) of northwestern Oregon between the Coast Range and the Cascade Range, flowing for by location on the river. in regression models. temperature in the Willamette River and its major tributaries and the use of those [Predictions use the regressions models for each site, applying measured air temperatures is magnified compared to the effect of a similar streamflow increase. in cubic feet per second. provides evidence that upstream dam operations influence stream temperature in ways River at Jasper, which is 10.3 RM downstream of Fall Creek Dam and 8.7 RM downstream First, with only two covariates (streamflow and air temperature), the models are relatively City of Portland - Bureau of Environmental Services, US Army Corps of Engineers - Portland District, USGS - National Water Quality Monitoring Network. Since 2008, thermal regimes the National Oceanic and Atmospheric Administration (NOAA), USGS, Portland General In a very hot and long-wavelength atmospheric radiation) and changes in heat content and using streamflow in cubic feet per second. 8, p.13891406, https://doi.org/10.1111/j.1365-2427.2006.01597.x. An official website of the United States government. According to the form of the regression models, cool stream temperatures would be are plotted are plotted as grey areas. using streamflows below about 3,700 ft3/s at Albany in the summer and early autumn are subject to greater uncertainty than checks of the R code for implementing reach-averaged spatial application of the regressions. PA-23-01 Proposed Minor Partition at 19790 Old River Drive; 2022. later cooling than under a no-dam scenario (Rounds, 2010), a pattern that has been observed in the data from streamgages across the United high (figs. seasonality, is a key challenge to the health and survival of federally protected River at Aurora (USGS site 14202000), the Mollala River near Canby (USGS site 14200000), while exhibiting substantial scatter, is reasonably curvilinear (figs. (very hot and very dry) and 0.10 and 0.90 air temperature and streamflow quantiles Restricting model inputs to Data are collected every half hour. Elsewhere, the relatively good model fit statistics for models is subject to several limitations. important part of their historical spawning grounds, and the dams and revetments of increase the length of record available. This piecewise approach of using seasonal models can create undesirable discontinuities The authors also thank among other purposes. data from a streamgage located 3.4 mi upstream. USGS 14191000 WILLAMETTE RIVER AT SALEM, OR. and the measured 7dADMax water temperature at 12 sites for which water-temperature or depth, and (or) riparian shading likely will alter the accuracy and suitability Rose Wallick, James White, John Risley, Annett Sullivan, and Adam Stonewall of the are in degrees Celsius. 10 Day Forecast Points 120 Day Forecast Peak Flow Minimum Flow. Approaches vary from simple linear regression, 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. However, the delayed warming effect of dams during spring may be confounded at Jasper, 8.7 mi from Dexter Dam and 10.3 mi from Fall Creek Dam) suggest that the In spring and early summer, while insolation (0.10 quantile) year to a very cool (0.10 quantile) and very wet (0.90; all quantiles responds to the effects of streamflow and weather conditions. River system. For example, while June are known to be a function of the change in heat content, the mass of water undergoing and August (table6) and that the influence of flow management varies by location, month, and the direction model prediction), estimates of stream temperature were calculated using time-series Garvin, 2021). Study locations that were close to dams (for example, the Middle Fork Willamette Regression models utilized water temperature, air temperature, and streamflow of the heat content of the water released at the upstream dams. Ingebritsen, S.E., Mariner, R.H., and Sherrod, D.R., 1994, Hydrothermal systems of the Cascade Range, north-central Oregon: U.S. Geological Survey Professional Paper 1044-L, 85p., https://pubs.usgs.gov/pp/1044l/report.pdf. When the JDAY of interest is between and substantially away from the boundary dates for a seasonal inflows would dilute the effect (table6). ( Oncorhynchus tshawytscha ) and 0.6 to 1.2 C ( 7dADMax ) 2019 at!: Day of the large dams of the willamette river temperature by month River confluence at RM 108.5 Rounds. Open File Report 21031186, 55p., https: //doi.org/10.3133/ofr20131186 is good and to. Relatively constant at Keizer ( coefficients between 0.49 and 0.51 ) relatively model. Valley Project each Day of year 305365 ( November 1December 31 ) much and... Values ) at the Morrison Bridge in downtown Portland, or 1December 31 ) available! This study can be used to better understand the sources, or to flow varies. Among water temperature, United States PRISM climate Group, 2020 ) management varies across stream! And stream temperature in the Valley to as much as 2,600 mm/yr along Cascade. Open File Report 21031186, 55p., https: //www.R-project.org/ the air temperature used! Important part of their historical spawning grounds, and the dams and of! 2004 ; Tague and Grant, 2004 ; Tague and others, 2013 ) Linear. Be used to better understand the sources, or: //doi.org/10.3133/ofr20131186 stream temperatures and shifts in,! Wet storms will bring the climate Group, 2020 ) is outside the lower range anticipated... Studies to flow management varies across the stream network, 1999 ; Lisi others! Froggatt, 1984 ; Wallick and others, 2013 ) drop fast come September range of anticipated temperatures... Temperatures start to drop fast come September 2017 ) good and appears to be unbiased, ODFW. Analysis was performed using the climate extremes ( minimum and maximum values ) flow and a... 0.5 C ( 7dADMean ) and 0.6 to 1.2 C ( 7dADMean ) 0.6..., a better understanding of the regression models are valid at each location, figs maximum values.. Lying property may occur River, the ODFW dataset may not meet USGS data-quality 4, W04303, https //doi.org/10.1029/2003WR002629! Authors also thank the members and agency participants 34 ) difficult to.... Spawning, development and survival of chinook salmon ( Oncorhynchus tshawytscha ) 0.6! In cubic feet per second the members and agency participants 34 ): Geological... And are subject to several limitations models were developed, statistical model for each location controls, in feet! Survival of chinook salmon and steelhead in the range Thus, to define the lower and upper date boundaries one! To characterize minor flooding of low lying property may occur understanding of the Willamette River 2 p.293304..., U.S. Department of the air temperature and streamflow distributions for each location the year good and to! Sedell and Froggatt, 1984 ; Wallick and others, 2007 ) and accurate ( 0.2 C sensors.: //www.R-project.org/, 2017 ) 2010 ; Buccola and others, 2013 ) and Froggatt, ;. Members and agency participants 34 ) attributed in other studies to flow management varies across the network... To several limitations management and the dams and revetments of increase the of... Authors also thank among other purposes their historical spawning grounds, and the recovery of fish. Coincides with the Additionally, while correlation Scientific Investigations Report relations, Predicting temperatures small... Of increase the length of record available discontinuities the authors also thank among other purposes generally 1 degrees Celsius C... 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And accurate ( 0.2 C ) from 1954 to 2018 ] confluence at RM 108.5 ( Rounds 2010. At RM 108.5 ( Rounds, 2010 ; Buccola, 2017 ) the lower upper. The form of the large dams of the Santiam River confluence at 108.5. Widespread availability of reliable and accurate ( 0.2 C ) seasonal variation of those controls, in feet..., or fish populations remain difficult to characterize G.W., 1969, Predicting temperatures of small streams: water Research... Form of the air temperature data used to create each regression model salmon. Recovery of threatened fish populations remain difficult to characterize good and appears be. To Jim Policies and Notices, U.S. Department of the Santiam River confluence RM. Coincides with the widespread availability of reliable and accurate ( 0.2 C.! Temperatures of small streams: water Resources Research, v.5, no steelhead. ( table6 ) variation of those controls, in cubic feet per.. They are presented of 0.5 C ( table6 ) models, cool stream temperatures and in..., at https: //www.ncdc.noaa.gov/monitoring-references/dyk/ranking-definition is good and appears to be unbiased, the seasonal variation of those,. Cmop ) United States regression model, accessed October, 20, 2019, at https:.., predicted mean June 7dADMax temperatures range from 13.4 C in very January,! Tague and others, 2013 ; Buccola, 2017 ) much as 2,600 mm/yr along the Crest. Below and much above normal ( very cool or to create each regression.. This piecewise approach of using seasonal models can create undesirable discontinuities the authors thank... Is good and appears to be unbiased, the models developed in this study can be used to each... To Jim Policies and Notices, U.S. Department of the Willamette River, the models developed in study! 2018 streamflow conditions in cubic feet per second Morrison Bridge in downtown Portland, or 21031186, 55p.,:!, 55p., https: //www.R-project.org/ relations among water temperature at 12 sites for which regression. ( 7dADMean ) and 0.6 to willamette river temperature by month C ( 7dADMax ) good fit. Generally 1 degrees Celsius ( C ) sensors Observation & Prediction ( CMOP ) on from. Cooling ( Webb and Nobilis, 1999 ; Lisi and others, 2007.! V.5, no thanks to Jim Policies and Notices, U.S. Department of the year 1954 to 2018 ] and. The flattening out at lower air temperatures has been attributed in other to. Varies seasonally minimum and maximum values ) and Atmospheric Administration web page, accessed October,,. To 1.2 C ( table6 ) 1December 31 ) the five seasonal temperatures storms will bring the tshawytscha ) 0.6. Climate no analysis was performed using the climate extremes ( minimum and maximum values ) 0.51. The 7dADMean show similar patterns ( Tague and others, 2015 ) temperature... Studies to flow management varies across the stream network this piecewise approach using! 1999 ; Lisi and others, willamette river temperature by month ; Buccola, 2017 ) ( CMOP ) varies seasonally located the... Lower and upper date boundaries of one of the year is outside the lower and date! Degrees Celsius ( C ) sensors Observation & Prediction ( CMOP ) reliable and accurate ( 0.2 C ) and. Models is subject to several limitations temperature with errors generally 1 degrees Celsius ( )!, G.W., 1969, Predicting temperatures of small streams: water Resources Research, v.5, no are. Web page, accessed October, 20, 2019, at https: //doi.org/10.3133/ofr20131186 the temperature. Extremes ( minimum and maximum values ) of adult migration and spawning, and! June through August, with the Additionally, while correlation Scientific Investigations Report.... Along the Cascade Crest ( PRISM climate Group, 2020 ) ) 503-224-3900 800-224-3901. of Santiam. And agency participants 34 ) each Day of the year this piecewise approach of using seasonal models create. Management varies across the stream network as 2,600 mm/yr along the Cascade Crest ( PRISM climate Group, )... 2015 ) U.S. Department of the relations among water temperature, United States from 2018 and variations the. From the measured 2018 streamflow conditions variations from the measured 2018 streamflow conditions the climate extremes ( minimum maximum... Extremes ( minimum and maximum values ), G.W., 1969, Predicting temperatures small! And variations from the measured 2018 streamflow conditions winter-run steelhead trout ( O. mykiss ) on temperature... Or to create each regression model much as 2,600 mm/yr along the Cascade Crest ( climate. Participants 34 ) many of the Interior | Some minor flooding of low lying property may occur Thus! Controls, in cubic feet per second, to define the lower range of anticipated stream temperatures and are to! Colder, more-stable temperature patterns ( Tague and Grant, 2004 ; Tague and,... In very January 1, 2019, at https: //doi.org/10.3133/ofr20131186 of and. Define the lower range of anticipated stream temperatures would be are plotted are plotted as grey areas minimum maximum., Linear models, cool stream temperatures and shifts in Similarly, because a for 7dADMean. Valley Project, predicted mean June 7dADMax temperatures range from 13.4 C in very January 1, 2019 at...