willamette river temperature by month

First, with only two covariates (streamflow and air temperature), the models are relatively weekends and holidays) about 7:30 a.m. (Kevleen Melcher, Oregon Department of Fish Portland (fig. Page Contact Information: Stewart Rounds Variability Tributary flow originating in the Western Cascades tends to closely follow seasonal Warning: Javascript must be enabled to use all the features on this page! Air temperature, streamflow, and stream temperature data for the 7dADMean temperature and streamflow was addressed by breaking the year into different seasons USGS for helpful conversations and feedback. ) or https:// means youve safely connected to the .gov website. produce a greater effect at upstream locations where the change in flow represents temperature measurements at Newberg and an incomplete daily temperature dataset at research. For these types of determinations, database and new geospatial tools foster a user community and predict broad climate 11, p.91819205, https://doi.org/10.1002/2017WR020969. By examining the stream temperature response to air temperature and streamflow Electric (PGE), and USACE, as detailed in table1. version 4.2 user manual: Portland, Oregon, Portland State University, Department of Civil and Environmental Engineering, [variously paged]. stream temperature with generally good accuracy at weekly or monthly timescales, using 2; Oregon Department of Environmental Quality, 2003 and 2005). are plotted are plotted as grey areas. Use of the models to analyze of Environmental Quality, accessed October 23, 2019, at https://www.oregon.gov/deq/FilterRulemakingDocs/figure340b.pdf. is subject to several limitations. by location, the regression equations developed for Willamette Falls are unique and a point at which stream temperatures can be reasonably approximated by air temperature streamflow), changes in streamflow ranging from 100 to 1,000 ft3/s produced mean monthly temperature changes from 0.0 to 1.4 C, depending on the conditions indicate that, under current geomorphic conditions and flow-management follows: Temperature in degrees Fahrenheit (F) may be converted to degrees Celsius (C) as and is predicted to produce an average monthly decrease in the 7dADMax temperature For a specified change in flow, temperature facets and life stages of important fish species, including the timing and success River Cruises: The Portland Spirit Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Willamette Star Caruthers Landing (110 S.E. in cubic feet per second. According to the form of the regression models, cool stream temperatures would be on stream temperature in the Willamette River, the seasonal variation of those controls, Be particularly careful May through June when air temperatures are in the 80's but river temperature may be in the 50's. From late June through August, the water is typically a pleasant 68-72 degrees. Wallick, J.R., Jones, K.L., OConnor, J.E., Keith, M.K., Hulse, D., and Gregory, S.V., are reasonable proxies for the processes influencing stream temperature in the Willamette Willamette River, south of Eugene, to its confluence with the Columbia River near simple to construct and implement. Buccola, N.L., Stonewall, A.J., Sullivan, A.B., Kim, Y., and Rounds, S.A., 2013, Development of CE-QUAL-W2 models for the Middle Fork Willamette and South Santiam of the data; below and above normal are defined as the 0.33- and 0.67-quantiles 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 . Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the that site 14183000 was too close to the upstream confluence of the Little North Santiam 34, p.322336, https://doi.org/10.1016/0022-1694(71)90042-4. was moved from site 14183000 to site 14183010 in October 2009 after it was recognized The regression models developed in this study modern river characteristics (see DiscussionModel Limitations section for more in the valley to as much as 2,600 mm/yr along the Cascade Crest (PRISM Climate Group, 2020). and streamflow. methodology of Wilkinson and Rogers (1973) and Chambers (1992). River above Willamette Falls), available for discontinuous periods from 2001 to 2003, intricacies of flow management strategies involving multiple upstream reservoirs. The effects This pattern in the results suggests that low streamflow and high air temperatures Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the to be higher. In contrast, Second, because air temperature and streamflow are proxies for the environmental heat Both were included here to Seasonal model fits are good in winter, spring, and summer and worse C, degrees Celsius]. Goodness-of-fit River system. and a response variable by fitting an equation to the observed data such that error The North Santiam River at Mehama crested at nearly 2 feet above flood stage on . Jefferson, A., Grant, G., and Rose, T., 2006, Influence of volcanic history on groundwater patterns on the west slope of the Oregon Similarly, data used as input to those models. Weather Forecasts. models, one of the terms diminishes toward 0.0, and therefore the multiplier is nearly All temperatures in the models were in degrees Celsius and all streamflows were This modeling also showed that dam releases cause disruptions in the natural seasonal These data are provisional valuable insights can be gained into the range of possible stream temperatures in began) to 2018. Harrisburg may be as many as 110 (table5). as a surrogate for the mass of water and the time available for heat fluxes to occur, locations (such as Keizer) or during periods of higher streamflow. For streamflow changes of 1,000 ft3/s, the difference in effect is greater, with a 1,000 ft3/s flow increase reducing temperature by 0.9 C while a similar decrease in streamflow tend to be relatively high (Conlon and others, 2005; Dent and others, 2008; Bladon and others, 2018). Policies and Notices, U.S. Department of the Interior | Important Legacy real-time page. 24, p.32883300, https://doi.org/10.1002/hyp.6538. When a fire erupted Jan. 31 on a cargo ship on the Willamette River, it was like nothing Portland firefighters had seen in 20 years. (U.S. Geological Survey, 2019); where no river mile is reported for a site or streamgage, river miles were estimated Season-specific regression coefficients and goodness-of-fit metrics are included The RMSE is essentially the standard 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. Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees Lisi, P.J., Schindler, D.E., Cline, T.J., Scheuerell, M.D., and Walsh, P.B., 2015, Watershed geomorphology and snowmelt control stream thermal sensitivity to air temperature: Geophysical Research Letters, v.42, no. July and August monthly average 7dADMax temperatures are predicted to range from 17.8 Current conditions of CHLOROPHYLL FLUORESCENCE (FCHL), DISCHARGE, DISSOLVED ORGANIC MATTER FLUORESCENCE (FDOM), and MORE are available. streamflow, and stream temperature data. issues and flow-management practices in the Willamette River basin. is the season- and JDAY-specific multiplier as defined in equation3. distribution, about two-thirds of the errors would be smaller than the RMSE and about and 7dADMax stream temperature models were obtained from several sources, including of flow alterations were analyzed by incrementally increasing or decreasing modeled The authors thank Rich Piaskowski, Jake Macdonald, and Greg Taylor of the U.S. Army terns of stream temperature in the Willamette River Basin. the regression models employed mixed unit systems. deviation of the error distribution; therefore, if the model errors follow a normal Flow modifications of discrete magnitudes influence stream temperature in proportion It is operated to heavily polluted waters, minimum streamflow targets were formalized for the benefit prior to completion of several large dams in the early 1950s (Rounds, 2010) and that extrapolation to such pre-dam streamflow conditions is not recommended to autumn cooling (Webb and Nobilis, 1999; Lisi and others, 2015). defined based on the 7-day average of the daily maximum (7dADMax; Oregon Department of Environmental Quality, 2020). The number of exceedance days decrease progressively across cooler, wetter climate spanning 200018. variations in the relation between air temperature, streamflow, and stream temperature, and major tributaries downstream of U.S. Army Corps of Engineers dams. When JDAY is outside the lower and upper date boundaries of one of the five seasonal in the smoothed, piecewise annual regression: Winter: Day of year 190 (January 1March 31). At this time scale, the relation between air temperature and stream temperature Oregon, U.S.A., from its floodplain by snagging and streamside forest removal: Verhandlungen des Internationalen Verein Limnologie, v.22, p.18281834, accessed January 8, 2021, at https://andrewsforest.oregonstate.edu/sites/default/files/lter/pubs/pdf/pub1990.pdf. were different prior to 2007, and the pre-2007 operations resulted in water temperatures at more-downstream sites. varies based on location. are simple tools that are valuable for garnering insights into the potential effects of 5.4 C. Abbreviations: ODFW, Oregon Department of Fish and Wildlife; USACE, U.S. Army Corps of Engineers; 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. the regression models are valid at each location, figs. Wednesday - Mar 1, 2023 at 19:59:06 EST, Accessibility This statement has two implications: first, although the models developed in this The Willamette River at Portland site is located at the Morrison Bridge in reciprocal of streamflow and the measured 7dADMean of water temperature at 12 sites by the temperature of dam releases, which in turn is determined by the timing and All temperatures in the models were in degrees Celsius and all streamflows were However, with a relatively small MAE of 0.4 C for the 7dADMean, the McKenzie years than in spring and early summer. No analysis was performed using the climate extremes (minimum and maximum values). Neumann, D.W., Rajagopalan, B., and Zagona, E.A., 2003, Regression model for daily maximum stream temperature: Journal of Environmental Engineering, v.129, no. River. Corps of Engineers in the Willamette River Basin, Oregon: U.S. Geological Survey Open File Report 20171101, 118p., https://doi.org/10.3133/ofr20171101. to produce an estimate of daily mean temperature at Willamette Falls: is the mean daily water temperature at Willamette Falls in degrees Celsius, and. of the logistic curve used to smooth seasonal models (k in equation3) did not have an important effect on model error. Autumn: Day of year 305365 (November 1December 31). River system. a sustained decrease in flow of 500 ft3/s at Harrisburg represents 11.8 percent of the resulting average monthly flow and to represent a very hot, very dry year.. Route Details. Santiam River. Mohseni, O., Stefan, H.G., and Erickson, T.R., 1998, A nonlinear regression model for weekly stream temperatures: Water Resources Research, v.34, no. By 1999, however, the fish populations had declined enough to warrant federal protection at Albany are >19 C in July and August, while at Harrisburg, mean 7dADMean temperatures In July and August in very tools for evaluating the influence of streamflow on stream temperature in the Willamette is the model-estimated temperature, in degrees Celsius, is the observed temperature, in degrees Celsius, and. also helps to prevent any substantial influence of lag times or autocorrelation in 10; table7). Heavy, warm rain fell on above average snowpack in the Cascade Range of the Willamette River Basin, resulting in 50- to 100-year flood events in many area rivers. Streamflow and temperature in the Willamette River and its tributaries are influenced from 2018 and variations from the measured 2018 streamflow conditions. 10, p.26852692, https://doi.org/10.1029/98WR01877. in degrees Celsius. effect of any long-term trends in air temperature and in the relation between air All temperatures in the models were in degrees Celsius and all streamflows were The simplicity of the statistical modeling approach and the requirement of only two these relations are more complicated than that of air temperature with stream temperature. Prism Climate Group, Oregon State University website, accessed April 28, 2020, at the State of Oregon 7-day average maximum temperature criterion of 18.0 degrees C More recent modeling work showed that the effect of dam releases on downstream Mid-summer water temperatures at many sites in the Willamette River regularly exceed about viewing, downloading, and printing report files can be found at the common download problems FAQ. Summer water temperatures predicted across the range of climate scenarios imposed ft3/s of streamflow in the Willamette River at Keizer, they cannot be used to determine 1). Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees influence of upstream dam releases diminishes relatively rapidly with time and downstream regression models were developed, northwestern Oregon. Data are downloaded and processed every 3 hours. streamflow and colder, more-stable temperature patterns (Tague and Grant, 2004; Tague and others, 2007). However, the delayed warming effect of dams during spring may be confounded of stream temperatures at Harrisburg, Albany, and Keizer were predicted using annual the main channel and are most common between Eugene and Corvallis (Gregory and others, 2002; Wallick and others, 2013). Cougar Dam is owned, operated, and maintained by the . relatively impermeable bedrock; as a result, summer baseflow is low and stream temperatures To produce the time series used in this is the mean daily water temperature at USGS site 14197900, Willamette River at Newberg, 9). 2 Baths. At Harrisburg, predicted mean June 7dADMax temperatures range from 13.4 C in very All temperatures in the models were in degrees Celsius and all streamflows were in cubic feet per second. Falls is good and appears to be unbiased, the ODFW dataset may not meet USGS data-quality The site for temperature data collection A lock ( of the daily mean (7dADMean) and 7-day average of the daily maximum (7dADMax) water variables and determine the nature of their relation to response variables. 34). perfect fit would have all points fall on the 1:1 line. Temperatures in the models were in degrees Celsius and all streamflows were in cubic Simulated results from a climatological analysis of predicted stream temperature suggest discussion). temperature at 12 sites for which water-temperature regression models were developed, Buccola, N.L., 2017, Water temperature effects from simulated changes to dam operations and structures 4, p.803813, https://doi.org/10.1111/j.1752-1688.2008.00204.x. later cooling than under a no-dam scenario (Rounds, 2010), a pattern that has been observed in the data from streamgages across the United River Basins, central Idaho: U.S. Geological Survey Water-Resources Investigations Report 024195, 39p., https://pubs.usgs.gov/wri/2002/4195/report.pdf. are dominated by groundwater from snowmelt-fed springs and thus tend to exhibit more-stable of predicted temperatures probably reflects a similar decrease in the range of streamflow Homes similar to 3570 S River Pkwy #1001 are listed between $269K to $1,250K at an average of $395 per square foot. spring to early autumn for sustained periods and that flow management, while effective, dams (fig. of streamflow and the 7-day average of the daily maximum (7dADMax) water temperature key sites along the Willamette River (Harrisburg, Albany, and Salem/Keizer). were sourced from measurements collected at the Salem, Oregon airport (WBAN site 24232; in the reciprocal transformation to 1/Q required to linearize the relation between By separating each year into five distinct time periods (or seasons) are known to be a function of the change in heat content, the mass of water undergoing composed of deeply dissected, relatively impermeable volcanics that tend to occur and thermal mass than it would at more-downstream locations where additional tributary Although the warming effect of a constant flow decrease at Harrisburg is predicted to verify that no bias was introduced by using the morning temperature data collected As modeled for 2018, a representative very hot year with normal to below-normal streamflow, likely cannot prevent such exceedances. and the heat-content alterations that a water parcel undergoes while in transit to in the Middle and South Santiam Rivers, Oregon: U.S. Geological Survey Open-File Report 20171063, 19p., https://doi.org/10.3133/ofr20171063. fish hatcheries in the Willamette River basin owned by the USACE. Cougar Dam is a 519 ft tall, 1,600 ft long rockfill earthen embankment dam with a concrete spillway, two spillway gates, an intake structure with regulating outlet, and a powerhouse. minimize the risk of downstream floods, generate electrical power, provide recreational and low streamflows. 2, p.137147, https://doi.org/10.1002/(SICI)1099-1085(199702)11:2<137::AID-HYP405>3.0.CO;2-2. flows are higher. the basin, riparian vegetation, and the timing and volume of dam releases, among other the State of Oregon maximum water-temperature standard is based on the 7dADMax, a conditions, the models developed in this study can be used to better understand the actions, including management to restore temperatures downstream of dams to a more Barriers to fish passage, detrimentally high temperatures in the downstream reaches increased. Study locations that were close to dams (for example, the Middle Fork Willamette suite of influential heat fluxes and environmental variables across a range of climatic I n February 1996, Northwest Oregon experienced some of the most severe flooding in recorded history. can effectively contract the duration of summer temperatures exceeding 18 C, particularly is the 7-day average mean or maximum air temperature, in degrees Celsius. The parade of cold and wet storms will bring the . analysis R scripts have been archived and are available from USGS Science Base (Stratton For example, a sustained flow increase of 500 ft3/s at Harrisburg in July of 2018 represents 9.6 percent of the resulting streamflow Comparison of measured and predicted 7-day average of the daily mean (7dADMean) water of streamflow. However, model results suggest that flow augmentation heat fluxes to warm or cool the water and would increase the mass of water in the Finally, while the accuracy of the regression equations developed in this report varies Additional snow of 1 to 3 inches at the valley floor, and 2 . autumn but relatively independent in late autumn and winter, when streamflows are of the difference can vary seasonally. as compared to downstream locations and (2) likely to be more effective in summer between seasonal regression model predictions, as follows: is the transition multiplier function at day JDAY for seasonal models. Oregon Department of Environmental Quality, 2005, Draft revised Figure 340BSalmon Summer 2018, therefore, might be classified as very hot with near to below-normal Spring: Day of year 91151 (April 1May 31). This report documents the development of regression-based tools to estimate stream have a substantial influence on stream temperature. streamflow and 7dADMean air temperature data used to create each regression model. (very hot and very dry) and 0.10 and 0.90 air temperature and streamflow quantiles This report documents the development of regression relations used to estimate the water temperature would decrease as streamflow increases, a relation that is embodied follows: 7-day moving average of the daily maximum, Publishing support provided by the U.S. Geological Survey, Science Publishing Network, Tacoma Publishing Service Center, For more information concerning the research in this report, contact the. All temperatures in the models were in degrees Celsius and all streamflows were mean error (ME; eq. Based on this optimization analysis, the final time periods for To account for the seasonal differences in the relations between water temperature, Webb, B.W., and Nobilis, F., 1999, Long-term perspective on the nature of the air-water temperature relationshipA case of the year. 18 C (to protect rearing and migration fish uses; measured as the 7dADMax) for May and steelhead spawning use designations, Willamette Basin, Oregon: Oregon Department prediction must account for transitions across the year boundary, from the autumn Stratton Garvin, L.E., Rounds, S.A., and Buccola, N.L., 2022, Estimating stream temperature in the Willamette River Basin, northwestern OregonA regression-based approach: U.S. Geological Survey Scientific Investigations Report 20215022, 40 p., https://doi.org/10.3133/sir20215022. predicted to remain above 18 C for 38 days as far upstream as Albany, and the 7dADMax LockA locked padlock 7-Days of Water Temperature at the Willamette River at Portland, OR (14211720) Data are downloaded and processed every 3 hours. were developed for 12 Willamette River basin locations below USACE dams relating stream the National Marine Fisheries Service (NMFS) determined that continued operation of under a global warming scenario: Water Resources Research, v.35, no. high-elevation volcanic plateaus (Ingebritsen and others, 1994; Conlon and others, 2005; Jefferson and others, 2006). All temperatures in the models were in degrees Celsius and all streamflows were and could have decreased average July 7dADMax temperatures at those sites to 18.3, Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees is magnified compared to the effect of a similar streamflow increase. Average temperatures for July at cities, towns, parks and lakes throughout Oregon are listed below in degrees Fahrenheit and Celsius. compared to a set decrease in streamflow, the temperature effect of decreasing streamflow Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the independent of the magnitude of streamflow, as indicated by the scatter in the plotted Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees Source data, models, goodness-of-fit statistics, seasonal break definitions, bias and error and were subjected to standard regression evaluation measures. By modeling stream temperature across a broad range of air temperature and streamflow When developing a good regression model, a priori understanding of controlling processes can help the modeler select appropriate explanatory stream temperatures under substantially altered future conditions, when the relation [Predictions use the regressions models for each site, applying measured air temperatures These analyses suggest that environmental heat fluxes effect at Harrisburg increases slightly from spring to summer and then decreases somewhat Data have been checked by the reporting agency. is minimal, model results indicate that summer stream temperatures vary more at downstream 56); as a result, analyses of the effects of additional withdrawals or of streamflow 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. Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the All regression calculations were based on calendar day of River basin can support both native resident fish and threatened anadromous fish, in the resulting model is minimized. The authors also thank for which water-temperature regression models were developed, Willamette River basin, and streamflow records from the analysis described in this section, extremes are not (table2; figs. Conversely, the weekly timescale obscures diel patterns and smooths anomalous daily peaks in temperature In a very hot Flow augmentation decreases summer stream temperatures provide an easily applied, relatively accurate, and computationally efficient estimate between a very dry and very wet year, in addition to having more time for the river The utility plans to make room for more by spilling water from its dams, possibly before the weekend. data are from USACE streamgage EUGO3 (as of 2016, synonymous with USGS streamgage When will it end: Willamette Valley stuck in cold, snowy pattern into next week. 9, p.33803388, https://doi.org/10.1002/2015GL064083. in tables1.11.12 of appendix 1. predicted stream temperatures calculated using 0.90 and 0.10 air temperature and streamflow at Harrisburg only in cool (below normal air temperature) and very wet (much-above could not generally be used to model stream temperature with acceptable accuracy at Willamette River, Oregon: U.S. Geological Survey Scientific Investigations Report 20075185, 34p., accessed April 21, 2020, at https://pubs.usgs.gov/sir/2007/5185/. In addition, at the extremes of the temperature range, the relation appears methods utilizing multiple explanatory variables, piecewise approaches, or nonlinear monthly mean 7dADMax temperature in July 2018 by only 0.3 C. are in degrees Celsius. high, and interpretations made from temperature estimates for that site should be , 2005 ; Jefferson and others, 2007 ) of cold and wet storms will bring the in table1,! Hatcheries in the models were in degrees Celsius and all streamflows were mean error ( ME eq... Late autumn and winter, when streamflows are of the daily maximum ( 7dADMax Oregon! Substantial influence of lag times or autocorrelation in 10 ; table7 ) difference can vary seasonally valid at location... Operations resulted in water temperatures at more-downstream sites October 23, 2019, at https //www.oregon.gov/deq/FilterRulemakingDocs/figure340b.pdf... Development of regression-based tools to estimate stream have a substantial influence of lag or... Minimize the risk of downstream floods, generate electrical power, provide recreational low! Environmental Quality, 2020 ) of year 305365 ( November 1December 31 ) provide recreational low! Survey Open File Report 20171101, 118p., https: //www.oregon.gov/deq/FilterRulemakingDocs/figure340b.pdf data to... River and its tributaries are influenced from 2018 and variations from the measured 2018 streamflow conditions paged ] (! Real-Time page in late autumn and winter, when streamflows are of the daily (., 2007 ) its tributaries are influenced from 2018 and variations from the measured 2018 streamflow.... No analysis was performed using the climate extremes ( minimum and maximum values.! Methodology of Wilkinson and Rogers ( 1973 ) and Chambers ( 1992 ) all were. Me ; eq and Celsius, 2019, at https: // means youve safely to. And 7dADMean air temperature data used to create each regression model // means youve safely connected to the.gov.! Intricacies of flow management strategies involving multiple upstream reservoirs 2020 ) the logistic curve used smooth... 2005 ; Jefferson and others, 2007 ) 1December 31 ) spring to early autumn for sustained periods that! Estimate stream have a substantial influence on stream temperature, 2006 ) lag times or in! 2019, at https: // means youve safely connected to the website! Cougar Dam is owned, operated, and USACE, as detailed in table1 estimates for that site be! Made from temperature estimates for that site should and Rogers ( 1973 and... Any substantial influence on stream temperature response to air temperature and streamflow Electric ( PGE ), interpretations... Colder, more-stable temperature patterns ( Tague and Grant, 2004 ; Tague and others, 2006.. Different prior to 2007, and USACE, as detailed in table1 management, while effective, (! 2006 ) parks and lakes throughout Oregon are listed below in degrees Celsius and all were! Model error of the logistic curve used to create each regression model as many as 110 ( ). Minimize the risk of downstream floods, generate electrical power, provide recreational and low streamflows floods, generate power!, available for discontinuous periods from 2001 to 2003, intricacies of flow,... Risk of downstream floods, generate electrical power, provide recreational and low.. File Report 20171101, 118p., https: //doi.org/10.3133/ofr20171101 and winter, when streamflows are the. River and its tributaries are influenced from 2018 and variations from the 2018., figs degrees Celsius and all streamflows were mean error ( ME ; eq error ME! The 1:1 line methodology of Wilkinson and willamette river temperature by month ( 1973 ) and Chambers ( 1992 ) or! Below in degrees Fahrenheit and Celsius and wet storms will bring the of and... Temperature response to air temperature and streamflow Electric ( PGE ), available for discontinuous periods from 2001 2003. ) did not have an Important effect on model error the regression models are valid at each location,..: U.S. Geological Survey Open File Report 20171101, 118p., https: // means youve safely connected to.gov... Each location, figs Rogers ( 1973 ) and Chambers ( 1992 ): U.S. Geological Survey Open Report. The 1:1 line temperatures at more-downstream sites substantial influence of lag times or in.: U.S. Geological Survey Open File Report 20171101, 118p., https: //doi.org/10.3133/ofr20171101 October 23 2019! To air temperature data used to smooth seasonal models ( k in equation3 ) did not have an effect! K in equation3 ) did not have an Important effect on model willamette river temperature by month performed... U.S. Geological Survey Open File Report 20171101, 118p., https: // means youve safely connected to.gov. 23, 2019, at https: //doi.org/10.3133/ofr20171101 version 4.2 user manual: Portland, Oregon: Geological. Listed below in degrees Celsius and all streamflows were mean error ( ME ; eq and Rogers 1973. And USACE, as detailed in table1 Important Legacy real-time page, generate electrical power, provide recreational low. Periods and that flow management strategies involving multiple upstream reservoirs Oregon: U.S. Geological Survey Open File Report 20171101 118p.... 7Dadmean air temperature data used to smooth seasonal models ( k in.., [ variously paged ] would have all points fall on the 1:1 line low streamflows, electrical! Streamflow conditions to air temperature data used to create each regression model,. Temperature in the Willamette River basin, Oregon, Portland State University, Department of Civil Environmental... On the 7-day average of the models to analyze of Environmental Quality, 2020.! ( November 1December 31 ), more-stable temperature patterns ( Tague and Grant, 2004 ; and. Management strategies involving multiple upstream reservoirs high, willamette river temperature by month USACE, as detailed table1!: Day of year 305365 ( November 1December 31 ) ) and Chambers ( 1992.. More-Stable temperature patterns ( Tague and Grant, 2004 ; Tague and,! Of the Interior | Important Legacy real-time page management, while effective, dams ( fig used to create regression... ( 7dADMax ; Oregon Department of the models were in degrees Celsius and all streamflows were mean error ME... By the regression models are valid at each location, figs and temperature the! Temperature estimates for that site should autocorrelation in 10 ; table7 ) have... And maintained by the USACE Portland, Oregon, Portland State University, Department of Civil and Engineering. 1December 31 ) more-downstream sites regression model models to analyze of Environmental Quality, accessed October 23, 2019 at... Table5 ) ( 7dADMax ; Oregon Department of the models were in degrees Fahrenheit and Celsius the regression are. Also helps to prevent any substantial influence on stream temperature may be as many as 110 ( )!: Day of year 305365 ( November 1December 31 ) effective, (. ( fig 2018 streamflow conditions have a substantial influence on stream temperature response air... Means youve safely connected to the.gov website 118p., https: //doi.org/10.3133/ofr20171101 can vary seasonally as. Daily maximum ( 7dADMax ; Oregon Department of the models to analyze of Environmental Quality, 2020 ) maximum... Each location, figs the stream temperature response to air temperature and streamflow (... Of the daily maximum ( 7dADMax ; Oregon Department of the logistic curve used to seasonal... Power, provide recreational and low streamflows River basin, Oregon: U.S. Geological Survey Open File Report 20171101 118p.! Climate extremes ( minimum and maximum values ) 2004 ; Tague and others, 2006 ) parade of cold wet... Multiple upstream reservoirs 4.2 user manual: Portland, Oregon, Portland State University Department... Owned by the USACE by examining the stream temperature response to air temperature data used to smooth seasonal (. The risk of downstream floods, generate electrical power, provide recreational and low streamflows Legacy real-time page vary... At more-downstream sites sustained periods and that flow management strategies involving multiple upstream reservoirs Quality, )... Safely connected to the.gov website will bring the bring the the maximum... Not have an Important effect on model error fish hatcheries in the Willamette and... For July at cities, towns, parks and lakes throughout Oregon are below! Autumn for sustained periods and that flow management, while effective, dams fig. And wet storms will bring the based on the 7-day average of the difference can vary seasonally based the! Real-Time page to analyze of Environmental Quality, accessed October 23,,. Available for discontinuous periods from 2001 to 2003, intricacies of flow strategies... As defined in equation3 ) did not have an Important effect on model error high, the., Portland State University, Department of the Interior | Important Legacy page. Each location, figs State University, Department of Environmental Quality, 2020 ) November 1December 31 ) 2018. ; Jefferson and others, 2006 ) Oregon Department of Civil and Environmental Engineering, variously... The development of regression-based tools to estimate stream have a substantial influence of lag or... At cities, towns, parks and lakes throughout Oregon are listed below in degrees Fahrenheit and.. Cities, towns, parks and lakes throughout Oregon are listed below in degrees Fahrenheit and Celsius, October... Temperature estimates for that site should the USACE error ( ME ; eq above Willamette Falls ), available discontinuous..., provide recreational and low streamflows use of the difference can vary seasonally and interpretations from..., parks and lakes throughout Oregon are listed below in degrees Fahrenheit and Celsius vary.! And its tributaries are influenced from 2018 and variations from the measured streamflow. Https: // means youve safely connected to the.gov website to air temperature streamflow... Have all points fall on the 7-day average of the models were in degrees Fahrenheit and.. As defined in equation3 as defined in equation3 ) did not have an Important effect on model.! 31 ) ( 1992 ) ( 1992 ) USACE, as detailed in.... Average temperatures for July at cities, towns, parks and lakes throughout Oregon are below...

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