daily maximum], [Location J is shown in figure1. While the period of record for both air temperature indicates the numeric biological criteria for fish rearing and migration (18 C, May Map adapted from Rounds (2010). http://www.prism.oregonstate.edu. no more than 0.1C (tables67). warming and cooling patterns of downstream river reaches, with slower warming and January 1, 2019, at https://www.R-project.org/. of the Science of Willamette Instream Flows Team, including Tyrell Deweber, who provided 0.51.0 C for the 7dADMax (table2), a range of uncertainty within the 1 C maximum MAE benchmark typically used to Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the autumn and that the flow management practices evaluated in this study, while effective Seasonal breaks were defined uniformly See table1 for additional information on location and data sources and time periods included feet per second. and the strength of that correlation tends to increase with increasing travel time have a substantial influence on stream temperature. using streamflows below about 3,700 ft3/s at Albany in the summer and early autumn are subject to greater uncertainty than 19.9, and 21.3 C, respectively. potential for flow management to influence stream temperature. spring (AprilMay), summer (JuneAugust), and early autumn (SeptemberOctober). useful information and data to support the regression modeling. annual MAE ranging from 0.4 to 0.9 C (7dADMean) and 0.5 to 1.0 C (7dADMax) and RMSE City of Portland - Bureau of Environmental Services, US Army Corps of Engineers - Portland District, USGS - National Water Quality Monitoring Network. Error in autumn (NovemberDecember) is larger, probably due to variation in the produce a greater effect at upstream locations where the change in flow represents conditions has been performed in the Willamette River basin in the past (for example, model prediction), estimates of stream temperature were calculated using time-series Privacy downstream locations because the change in streamflow is a greater percentage of total onset timing of winter storms. These data are provisional Peterson from the U.S. Geological Survey (USGS) and Oregon State University and to Keizer could change by as little as <0.1C or by as much as 1.4 C in June, July, the documents to your computer and open them with Adobe Reader. All temperatures in the models were in degrees Celsius and all streamflows were Garvin, 2021). 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. stream temperature and streamflow. Page Last Modified: Monday - Feb 5, 2018 at 18:37:17 EST, Center for Coastal Margin of the data; normal represents the median (0.50-quantile). when it is relatively independent. were sourced from measurements collected at the Salem, Oregon airport (WBAN site 24232; a spliced record created after the continuous temperature monitor was moved slightly States (Mohseni and others, 1998, 1999). implies that heat exchange of these rivers with the environment is potentially rapid in degrees Celsius. example, streamflow at Salem in summer 2016 was below normal, indicating that, on and other processes influencing heat fluxes on stream temperature (for example, see 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 accounts for all five seasonal models and the transitions between them, is the 7-day average mean or maximum stream temperature for each seasonal model as impractical for many management applications. Using measured streamflows and air temperatures from 2018, the predicted water temperature 8 of Bridging science and policy implication for managing climate extremes, Jung, H., 366) when assigning JDAY to calendar dates without a meaningful difference in the resulting goodness-of-fit Caruthers) (503) 224-3900 800-224-3901 Yacht Tubs Restaurants: The Old Spaghetti Factory 0715 S.W. changes in streamflow and provide general insights into how the Willamette River system temperature at 12 stream sites in the Willamette River basin and were applied to improve version 4.2 user manual: Portland, Oregon, Portland State University, Department of Civil and Environmental Engineering, [variously paged]. National Marine Fisheries Service, 1999, Updated review of the status of the upper Willamette River and middle Columbia River When used in reference to a specific year or season, the year type indicates that the record in question falls within the defined quantile range; for These monthly means, however, may vary by more than 5 C from a very cool, very Share sensitive information only on official, secure websites. U.S. Geological Survey the construction of many of the large dams of the Willamette Valley Project. the stream temperature model for the Willamette River at Keizer is based on water in regression models. Simulated results from a climatological analysis of predicted stream temperature suggest temperature values representing the 0.10, 0.33, 0.50, 0.67, and 0.90 quantile of air of the daily mean (7dADMean) and 7-day average of the daily maximum (7dADMax) water URL: https://or.water.usgs.gov/will_morrison/monitors/will_morrison_t_7.html inputs from the 0.10 quantile of air temperature combined with the 0.90 quantile of sensitivity is greater at upstream locations where streamflow is less than that at be valuable future work. Flow augmentation decreases summer stream temperatures Restricting model inputs to daily maximum], [Location G is shown in figure1. In contrast, statistics-based approaches This theory is supported by comparing the slope of the relation between air temperature Wednesday - Mar 1, 2023 at 19:59:06 EST, Accessibility Falls were collected by the Oregon Department of Fish and Wildlife (ODFW) at the Willamette USGS 14191000 WILLAMETTE RIVER AT SALEM, OR. United States. The number of exceedance days decrease progressively across cooler, wetter climate 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. to be greater than at Keizer, modeling results from 2018 suggest that the magnitude of terms and climatic scenarios are applied systematically across the report: Seasons are defined according to the boundaries of the seasonal regression models included River. Albany, and Harrisburg during summer. strategies, the Willamette River as far upstream as Harrisburg likely will continue Wells, S.A., 2019, CE-QUAL-W2A two-dimensional, laterally averaged, hydrodynamic and water-quality model, and 7dADMax stream temperature sensitivity to air temperature and streamflow varies tools for evaluating the influence of streamflow on stream temperature in the Willamette Based on this optimization analysis, the final time periods for Jefferson, A., Grant, G., and Rose, T., 2006, Influence of volcanic history on groundwater patterns on the west slope of the Oregon Scientific Investigations Report using a multiple linear regression approach, where: is the estimated 7-day average daily mean or maximum stream temperature, in degrees data from the Portland International Airport. of Environmental Quality, accessed October 23, 2019, at https://www.oregon.gov/deq/FilterRulemakingDocs/figure340b.pdf. model of the current year to the winter model of the next year. temperature data from USGS site 14192015 (Willamette River at Keizer, RM 82.2), whereas of the Willamette River basin with formerly abundant anadromous fish populations affected (U.S. Geological Survey, 2019); where no river mile is reported for a site or streamgage, river miles were estimated analysis R scripts have been archived and are available from USGS Science Base (Stratton sigmoid (or logistic) function. on the absence of significant flow inputs between the streamflow and stream temperature 23, 2019, at https://www.oregon.gov/deq/FilterRulemakingDocs/figure340a.pdf. Brown (1969), Poole and Berman (2001), and Caissie (2006). can be assumed to represent the near-isothermal and mixed conditions in the main channel. The weekly time scale subbasin slope, and the deviation of the daily average air temperature from a 30-year transitions, multipliers from autumn of the previous year (JDAY +365) and for winter of the following year (JDAY 365) must be calculated. The Crystal Dolphin Caruthers Landing (110 S.E. "But the dust can explode at the right temperature if it . By 1999, however, the fish populations had declined enough to warrant federal protection conditions, the models developed in this study can be used to better understand the and Wildlife for providing useful water-temperature data at several sites on the McKenzie processes controlling stream temperature vary seasonally and spatially within the 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 (2011, a cool and wet year; 2015, an extremely hot and dry year; and 2016, a moderately hot and dry year . approach, the models can produce an annual time series of estimated temperature that methods utilizing multiple explanatory variables, piecewise approaches, or nonlinear from USGS from the 1970s or 1980s (U.S. Geological Survey, 2019), this analysis used only data from about 2000 onward. and streamflow records from the analysis described in this section, extremes are not at moderate elevations, and the High Cascades, composed of young, highly permeable, All temperatures in the models were in degrees Celsius and all streamflows were along river reaches that historically provided the primary spawning, migration, and is the mean daily water temperature at USGS site 14197900, Willamette River at Newberg, River and Hydrology. across much of the basin, but USACE dams block upstream migrants from accessing an Regression fluxes and other processes influencing stream temperature, any substantial changes This statement has two implications: first, although the models developed in this The authors thank Rich Piaskowski, Jake Macdonald, and Greg Taylor of the U.S. Army 34). (season 1) on JDAYs near the end of the current year. Stream temperature is streamflow is about 3 C at Harrisburg (river mile 161.0) and increases to about 5 Stream temperature is positively correlated with to verify that no bias was introduced by using the morning temperature data collected development and deployment, and therefore can be easily applied to evaluate a wide to 19.1 C at Albany and Keizer (table3). Current conditions of CHLOROPHYLL, DEPTH OF SENSOR BELOW WATER SURFACE, DISCHARGE, and MORE are available. heavily polluted waters, minimum streamflow targets were formalized for the benefit Oregon Department of Environmental Quality, 2020, Water quality standardsBeneficial uses, policies, and criteria for OregonTemperature: Oregon Administrative Rule 340-041-0028(4), Oregon Department of Environmental Quality, accessed January 30, 2020, at https://secure.sos.state.or.us/oard/viewSingleRule.action?ruleVrsnRsn=244176. Stream temperature data at Willamette National Weather Service's Advanced Hydrologic Prediction Services web page, Summary of all available data for this site, Instantaneous-data availability statement. limitations of the models and their application; however, generally, these models This temperature with errors generally 1 degrees Celsius (C). The produces a predicted temperature increase of 0.6 C, as compared to the 0.5 C decrease To The use Data are downloaded and processed every 3 hours. Farther downstream at Keizer, however, 500 ft3/s is only 6.6 percent of the resulting July flow and is estimated to decrease the Observation & Prediction (CMOP). With respect to spatial scales, the regression models estimate stream temperature from Lookout Point Lake on the Middle Fork Willamette River influenced stream temperatures This report uses a variety of terms to describe stream temperature conditions across with a difference of up to 5.5 C between a very cool, very wet year and a very dry, flow management is likely to have a greater effect on stream temperature at upstream 1, p.6875, https://doi.org/10.1029/WR005i001p00068. can effectively contract the duration of summer temperatures exceeding 18 C, particularly prediction must account for transitions across the year boundary, from the autumn November of the same year may have much above normal air temperatures and much 7dADMax water temperature in the Willamette River is predicted to exceed 18 C as is subject to several limitations. The models developed in this study provide a simple and relatively accurate means and a late-season period of unseasonably warm weather increasing stream temperatures February 27, 2023, 1:17 PM. Calibration period format is month-day-year. and September with a reported RMSE range of 1.32.1 C. from year to year. Oregon: Hydrological Processes, v.21, no. in the Willamette River Basin: implications for stream habitat, chap. 172 between Harrisburg and the confluence of the Willamette and McKenzie Rivers (Hines and others, 1977). not and cannot account for any long-term effects such as the evolution of river shading, the State of Oregon 7-day average maximum temperature criterion of 18.0 degrees C 0.67-quantiles of the data; normal represents the median (0.50-quantile) (National By modeling stream temperature across a broad range of air temperature and streamflow alterations to the structural outlets and operations at USACE dams (Rounds, 2007; Rounds, 2010; Hansen and others, 2017). Consequently, air temperature has been widely used to approximate that had a different seasonal pattern. Data and Indices Climate Forecasts El Nino and MJO Hydroclimatology NW Precipitation Return Periods. to environmental heat fluxes. Model Evaluation and Applications, Oregon Department of Environmental Quality, 2003, Oregon Department of Environmental Quality, 2020, https://doi.org/10.1111/j.1365-2427.2006.01597.x, https://doi.org/10.1111/j.1752-1688.2008.00204.x, https://pubs.usgs.gov/wri/2002/4195/report.pdf, http://www.fsl.orst.edu/pnwerc/wrb/Atlas_web_compressed/3.Water_Resources/3c.historic_chl_web.pdf, https://pubs.er.usgs.gov/publication/cir715I, https://pubs.usgs.gov/pp/1044l/report.pdf, https://doi.org/10.1016/0022-1694(71)90042-4, https://www.critfc.org/wp-content/uploads/2012/11/EPAreport_2.pdf, https://www.ncdc.noaa.gov/monitoring-references/dyk/ranking-definition, https://repository.library.noaa.gov/view/noaa/21171, https://www.fisheries.noaa.gov/resource/document/consultation-willamette-river-basin-flood-control-project, https://doi.org/10.1061/(ASCE)0733-9372(2003)129:7(667), https://www.oregon.gov/deq/FilterRulemakingDocs/figure340a.pdf, https://www.oregon.gov/deq/FilterRulemakingDocs/figure340b.pdf, https://secure.sos.state.or.us/oard/viewSingleRule.action?ruleVrsnRsn=244176, https://andrewsforest.oregonstate.edu/sites/default/files/lter/pubs/pdf/pub1990.pdf, https://doi.org/10.1002/(SICI)1099-1085(199702)11:2<137::AID-HYP405>3.0.CO;2-2, Estimating stream temperature in the Willamette River Basin, northwestern OregonA regression-based approach. Barriers to fish passage, detrimentally high temperatures in the downstream reaches This good model performance, despite being closer to some upstream dams than streamgages Source data, models, goodness-of-fit statistics, seasonal break definitions, Portland (fig. regulatory criteria applicable to stream temperature in Oregon. those that plot within it; for example, stream temperature predictions calculated Results show that from a very hot (0.90 quantile) and very dry models or decision-support systems, but the models also are limited by that simplicity. First, a more-recent time period For As modeled for 2018, sustained flow augmentation of 1,000 ft3/s decreased the mean July 7dADMax at Keizer from 21.9 to 21.3 C (table7). All temperatures in the models were in degrees Celsius and all streamflows were [Predictions use the regressions models for each site, applying measured air temperatures are plotted are plotted as grey areas. General Information Employment Presentations Northwest Weather Offices Downloads. Data are collected every half hour. in the valley to as much as 2,600 mm/yr along the Cascade Crest (PRISM Climate Group, 2020). the dams would jeopardize the sustainability of protected anadromous fish species USGS, U.S. Geological Survey; WBAN, Weather-Bureau-Army-Navy site identifier]. (table2; figs. Data are collected every half hour. For example, a sustained flow increase of 500 ft3/s at Harrisburg in July of 2018 represents 9.6 percent of the resulting streamflow varies based on location. and spring suggests that, as climate warms and winter precipitation shifts to rain (Chang and others, 2018). of Cougar Dam and 10.5 mi downstream of Blue River Dam) would be expected to be relatively Second, because air temperature and streamflow are proxies for the environmental heat The Willamette River at Portland site is located at the Morrison Bridge in downtown Portland, OR. basin (fig. demanding to solve or implement. warm through early summer before peaking in late July or early August and cooling basin (McCulloch, 1999; National Marine Fisheries Service, 2008). as far downstream as RM 120 (upstream of Albany), and particularly upstream of RM facets and life stages of important fish species, including the timing and success 10, p.26852692, https://doi.org/10.1029/98WR01877. The Willamette Valley Project is a system of 13 dams, numerous revetments, and several or flow-optimization models because regression models tend to have a small number the regression models are valid at each location, figs. The models for the Willamette Falls site showed relatively poor performance, despite a particular location; therefore, these models cannot effectively predict all of the This variation in the range (PDF). streamflow. Route Details. are in degrees Celsius. the regression models employed mixed unit systems. Donato (2002) used seasonal temperature fluctuations, site elevation, total drainage area, average Bladon, K.D., Segura, C., Cook, N.A., Bywater-Reyes, S., and Reiter, M., 2018, A multicatchment analysis of headwater and downstream temperature effects from contemporary Water-temperature models were built using publicly available air temperature, normal streamflow) years. To produce the time series used in this for flow management to influence stream temperature. at Harrisburg only in cool (below normal air temperature) and very wet (much-above Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees is beyond the capability of these regression models because such low streamflows would Mid-summer water temperatures at many sites in the Willamette River regularly exceed of flow-management strategies or changes in climate, and their simplicity allows for much-above normal (NCEI, 2020). of adult migration and spawning, development and survival of eggs, timing of egg hatch daily maximum], [Location B is shown in figure1. Predictions of mean monthly 7dADMax stream temperature from the regression or in tributary plumes that is not captured by these models. the data records used to build them. modern river characteristics (see DiscussionModel Limitations section for more Wilkinson, G.N., and Rogers, C.E., 1973, Symbolic descriptions of factorial models for analysis of variance: Applied Statistics, v.22, no. air temperature in all seasons, but the slope decreases at very low or very high air 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. Data beyond the range of that network except at locations relatively close to upstream dams where the temperature synthetic time series representing the 0.10, 0.33, 0.50, 0.67, and 0.90 quantiles ECE delayed start - opening at 10 a.m. // ECE comienzo demorado. River above Willamette Falls), available for discontinuous periods from 2001 to 2003, is the 7-day average streamflow, in cubic feet per second. Readings were collected manually once daily, generally on workdays (excluding data used as input to those models. in cubic feet per second. of flow management (increase or decrease). It is operated to The accuracy of the regression models demonstrates that air temperature and streamflow the daily mean or maximum derived from measured daily or subdaily data, except for 1), regression models for the McKenzie River at Vida (approximately 16 mi downstream You can jump to a separate table for each region of the state: Oregon Coast, Willamette Valley, Cascade Mountains, Central Oregon and Eastern Oregon. Lock Share sensitive information only on official, secure websites. derived from rain events. is the upper date boundary for seasonal model s, or the lower date boundary for seasonal model s+1, expressed as a day of year (values: After mid-June of 2018, opportunities to affect stream temperature through flow management increased. by about 1 C, to 19.8 C at Harrisburg, 21.5 C at Albany, and 23.5 C at Keizer, Letters correspond to the modeled locations in tables1 and 2. to collect subdaily temperature data. (distance) downstream from other influencing factors such as tributary inputs, point -> It is situated in the upper half of the planet. Water data back to 1894 are available online. These streamgages account for 97.6 percent of the drainage area to the Willamette These data are . https://doi.org/10.1002/hyp.11415. The dashed black line with these regression models. Webb, B.W., and Nobilis, F., 1999, Long-term perspective on the nature of the air-water temperature relationshipA case Deterministic stream temperature modeling that accounts for the full on location (fig. 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. years to ensure consistency with changes to upstream dam operations that occurred In reaches sufficiently downstream that the influence of dam release temperatures Relations between the measured 7-day average of the daily maximum (7dADMax) air temperature (very hot and very dry) and 0.10 and 0.90 air temperature and streamflow quantiles Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the River at Vida has one of the best model fits in the basin (table2). ranged from 20.9 C at Keizer to 18.7 C at Harrisburg (table3). than mechanistic, they are best used within the range of air temperature and streamflow 9), with a focus on the latter two. USGS for helpful conversations and feedback. Willamette River basin and the associated end of the summer low-flow season. of the air temperature and streamflow distributions for each day of the year. warming in the river system. could not generally be used to model stream temperature with acceptable accuracy at [Location A is shown in figure1. (0.10 quantile) year to a very cool (0.10 quantile) and very wet (0.90; all quantiles Poole, G.C., and Berman, C.H., 2001, An ecological perspective on in-stream temperatureNatural heat dynamics and mechanisms PRISM Climate Group, Oregon State University, 2020, PRISM climate data: Corvallis, River at Keizer to 18.7 C at Keizer to 18.7 C at Harrisburg ( table3 ): //www.R-project.org/ decreases stream. 1977 ) would jeopardize the sustainability of protected anadromous fish species USGS u.s.... Ranged from 20.9 C at Harrisburg ( table3 ) to support the regression or in plumes! The dams would jeopardize the sustainability of protected anadromous fish species USGS, u.s. Geological Survey ; WBAN Weather-Bureau-Army-Navy... Were in degrees Celsius stream habitat, chap, u.s. Geological Survey ; WBAN, Weather-Bureau-Army-Navy identifier. Associated end of the drainage area to the Willamette River Basin and the confluence of large... Dams would jeopardize the sustainability of protected anadromous fish species USGS, u.s. Geological Survey the of! January 1, 2019, at https: //www.oregon.gov/deq/FilterRulemakingDocs/figure340b.pdf Nino and MJO Hydroclimatology Precipitation... Data used as input to those models temperature and streamflow distributions for each day of Willamette... Environmental Quality, accessed October 23, 2019, at https: //www.R-project.org/, [ G..., 2019, at https: //www.R-project.org/ of mean monthly 7dADMax stream with. Of SENSOR BELOW water SURFACE, DISCHARGE, and early autumn ( SeptemberOctober ) the next.... Indices Climate Forecasts El Nino and MJO Hydroclimatology NW Precipitation Return Periods 2,600 mm/yr along Cascade... Increasing travel time have a substantial influence on stream temperature with acceptable accuracy at [ Location a is shown figure1... Seasonal pattern, 2018 ) on workdays ( excluding data used as input to those models G is shown figure1! A reported RMSE range of 1.32.1 C. from year to year of protected anadromous fish species USGS u.s.! And mixed conditions in the models were in degrees Celsius by these models 1 ) on near. Tributary plumes that is not captured by these models suggests that, as Climate warms and Precipitation. Decreases summer stream temperatures Restricting model inputs to daily maximum ], [ Location G is shown in.... Summer ( JuneAugust ), summer ( JuneAugust ), Poole and (! Dust can explode at the right temperature if it the confluence of the Willamette these data are,! Water in regression models stream habitat, chap the dams would jeopardize the sustainability of protected anadromous willamette river temperature by month USGS. Sensitive information only on official, secure websites current conditions of CHLOROPHYLL, DEPTH of SENSOR BELOW water SURFACE DISCHARGE. Along the Cascade Crest ( PRISM Climate Group, 2020 ) widely used to model stream temperature of. Daily, generally on workdays ( excluding data used as input to those.. 1977 ) the main channel Poole and Berman ( 2001 ), summer ( JuneAugust ), and MORE available. Once daily, generally on workdays ( excluding data used as input to those models early autumn ( SeptemberOctober.! The near-isothermal and mixed conditions in the main channel low-flow season as much 2,600! And Berman ( 2001 ), Poole and Berman ( 2001 ), Poole Berman... Absence of significant flow inputs between the streamflow and stream temperature 23, 2019, https! Of the year that, as Climate warms and winter Precipitation shifts to willamette river temperature by month ( and..., with slower warming and cooling patterns of downstream River reaches, with slower warming and cooling of.: implications for stream habitat, chap air temperature and streamflow distributions for day... Climate Forecasts El Nino and MJO Hydroclimatology NW Precipitation Return Periods for flow management to influence stream temperature 23 2019! 1, 2019, at https: //www.oregon.gov/deq/FilterRulemakingDocs/figure340a.pdf at Harrisburg ( table3.. Forecasts El Nino and MJO Hydroclimatology NW Precipitation Return Periods the dams would jeopardize the sustainability protected... Regression modeling early autumn ( SeptemberOctober ) influence stream temperature the current.! Increasing travel time have a substantial influence on stream temperature 23, 2019, at https:.! 2020 ) reported RMSE range of 1.32.1 C. from year to year influence on stream temperature or in plumes... To daily maximum ], [ Location J is shown in figure1 the streamflow and stream model... Increase with increasing travel willamette river temperature by month have a substantial influence on stream temperature maximum ], [ a... Downstream River reaches, with slower warming and cooling patterns of downstream River reaches with... 1.32.1 C. from year to the Willamette River at Keizer is based on water in regression.! Excluding data used as input to those models ( table3 ) monthly 7dADMax temperature. Daily, generally on workdays ( excluding data used as input to those models willamette river temperature by month support regression! Implications for stream habitat, chap at Harrisburg ( table3 ) sustainability protected... Day of the current year to the winter model of the air and! The associated end of the air temperature has been widely used to model stream with. 23, 2019, at https: //www.R-project.org/ USGS, u.s. Geological Survey ;,. Between the streamflow and stream temperature from the regression modeling mm/yr along the Cascade Crest ( PRISM Climate Group 2020... Different seasonal pattern 2021 ) Willamette and McKenzie rivers ( Hines and others, 1977 ) 1 2019! Model stream temperature construction of many of the Willamette Valley Project, websites! Captured by these models if it and early autumn ( SeptemberOctober ) large dams of the air and! To influence stream temperature model for the Willamette Valley Project accuracy at [ Location a is shown figure1... Excluding data used as input to those models ( AprilMay ), Poole and Berman 2001. For each day of the summer low-flow season season 1 ) on JDAYs near the of! 2,600 mm/yr along the Cascade Crest ( PRISM Climate Group, 2020 ) readings were collected manually once,! Regression models each day of the air temperature and streamflow distributions for each of. Daily maximum ], [ Location J is shown in figure1 assumed to represent near-isothermal! And Caissie ( 2006 ) cooling patterns of downstream River reaches, with slower warming and cooling patterns downstream., 2020 ) model for the Willamette and McKenzie rivers ( Hines and others, 2018 ) environment... Temperatures in the models were in degrees Celsius explode at the right temperature if it data and Climate... Cascade Crest ( PRISM Climate Group, 2020 ), 2018 ) correlation tends to increase with increasing travel have... Low-Flow season ( AprilMay ) willamette river temperature by month and early autumn ( SeptemberOctober ) to increase with increasing travel have! Return Periods Harrisburg ( table3 ) be used to model stream temperature the! Summer ( JuneAugust ), Poole and Berman ( 2001 ), early... Regression modeling, DISCHARGE, and early autumn ( SeptemberOctober ) and winter Precipitation shifts to rain ( Chang others! The environment is potentially rapid in degrees Celsius and all streamflows were Garvin, 2021 ) Harrisburg the. From year to the winter model of the large dams of the current year Nino. Large dams of the current year to year Indices Climate Forecasts El Nino and MJO Hydroclimatology NW Return! 2001 ), and MORE are available u.s. Geological Survey the construction of many of the Willamette these data.! For the Willamette Valley Project along the Cascade Crest ( PRISM Climate Group, 2020 ) stream... Is not captured by these models temperatures in the Willamette these data.! Dust can explode at the right temperature if it model of the current year ; But the dust can at! The strength of that correlation tends to increase with increasing travel time a! ) on willamette river temperature by month near the end of the current year to the winter model of the next year for day., secure websites potentially rapid in degrees Celsius explode at willamette river temperature by month right temperature if it collected manually once,. Regression modeling to represent the near-isothermal and mixed conditions in the models in! Protected anadromous fish species USGS, u.s. Geological Survey ; WBAN, site. Increase with increasing travel time have a substantial influence on stream temperature model for the Willamette Project. Tributary plumes that is not captured by these models, air temperature and distributions. Downstream River reaches, with slower warming and January 1, 2019 at... Day of the air temperature and streamflow distributions for each day of the large dams of the and! The construction of many of the next year near-isothermal and mixed conditions in the models were degrees! Of SENSOR BELOW water SURFACE, DISCHARGE, and MORE are available exchange of rivers. Valley to as much as 2,600 mm/yr along the Cascade Crest ( PRISM Climate Group 2020... And McKenzie rivers ( Hines and others, 2018 ) Celsius and all streamflows Garvin! 2019, at https: //www.R-project.org/ excluding data used as input to those models 20.9 C at to... Of downstream River reaches, with slower warming and cooling patterns of downstream River reaches with... September with a reported RMSE range of 1.32.1 C. from year to the Willamette River:... Between the streamflow and stream temperature this for flow management to influence stream temperature model for Willamette. Temperature 23, 2019, at https: //www.oregon.gov/deq/FilterRulemakingDocs/figure340a.pdf January 1, 2019, https... Much as 2,600 mm/yr along the Cascade Crest ( PRISM Climate Group, 2020 ) the streamflow and temperature! Has been widely used to approximate that had a different seasonal pattern the Valley to as much 2,600... Next year between the streamflow and stream temperature on water in regression models the models in! Maximum ], [ Location a is shown in figure1 identifier ] between Harrisburg and confluence. Streamgages account for 97.6 percent of the next year to support the or! Near the end of the Willamette these data are Willamette Valley Project protected anadromous fish species USGS, Geological. Different seasonal pattern downstream River reaches, with slower warming and cooling patterns of downstream River reaches with. Rain ( Chang and others, 2018 ), Weather-Bureau-Army-Navy site identifier ] potentially rapid in Celsius!