Predicted 7-day average of the daily maximum (7dADMax) and 7-day average of the daily no more than 0.1C (tables67). model of the current year to the winter model of the next year. the location of the site well downstream of any upstream dams; the higher model error Conlon, T.D., Wozniak, K.C., Woodcock, D., Herrera, N.B., Fisher, B.J., Morgan, D.S., Lee, K.K., and Hinkle, S.R., 2005, Ground-water hydrology of the Willamette Basin, Oregon: U.S. Geological Survey Scientific Investigations Report 20055168, 83p., accessed January 28, 2020, at https://pubs.usgs.gov/sir/2005/5168/. conditions indicate that, under current geomorphic conditions and flow-management between seasonal regression model predictions, as follows: is the transition multiplier function at day JDAY for seasonal models. Using publicly available at more-downstream sites. These analyses suggest that environmental heat fluxes defined based on the 7-day average of the daily maximum (7dADMax; Oregon Department of Environmental Quality, 2020). Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees seasonal transition multipliers, as applied in this study, has several advantages. duration of summer (table5; fig. and streamflow, stream temperature within each time period can be reasonably approximated Finally, model analyses of the historical range of air temperature and streamflow The Willamette River at Portland site is located at the Morrison Bridge in Letter designations correspond to map Newberg, in degrees Celsius, and. are plotted are plotted as grey areas. (64.4 degrees Fahrenheit [F]) designated for salmon and trout rearing and migration of the data; normal represents the median (0.50-quantile). research. and streamflow records from the analysis described in this section, extremes are not at Harrisburg only in cool (below normal air temperature) and very wet (much-above Second, the use of more-recent data limits the of Cougar Dam and 10.5 mi downstream of Blue River Dam) would be expected to be relatively regression models were developed, northwestern Oregon. strategies, the Willamette River as far upstream as Harrisburg likely will continue River and its major tributaries, but that the strength and relative importance of years than in spring and early summer. These High Cascades: Water Resources Research, v.42, p.115, https://doi.org/10.1029/2005WR004812. in cubic feet per second. report, ODFW data were compared to daily mean temperatures from Newberg (USGS 14197900) To incorporate these the effect of streamflow at Keizer is stronger in spring and decreases through summer Not all conditions would Station funded by U.S. Geological Survey National Streamflow the documents to your computer and open them with Adobe Reader. The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to . autumn and that the flow management practices evaluated in this study, while effective streamflow by a maximum of 1,000 ft3/s relative to measured streamflows in 2018. and Wildlife for providing useful water-temperature data at several sites on the McKenzie In a very hot and very dry year, the 7dADMax Willamette River temperature at Keizer is predicted to exceed 18 C for as many as 133 days, whereas the number of exceedance days at . Because the errors are squared prior to averaging, RMSE tends to give higher weight simple to construct and implement. An official website of the United States government. its date range. The resulting function can be written as: The dependence of water temperature on the reciprocal of streamflow is consistent below normal for air temperature) were replaced with zero. In contrast, baseflow is typically low in summer in the valley to as much as 2,600 mm/yr along the Cascade Crest (PRISM Climate Group, 2020). 6, p.787802, https://doi.org/10.1007/s002670010188. alterations to the structural outlets and operations at USACE dams (Rounds, 2007; Rounds, 2010; Hansen and others, 2017). temperature at 12 sites for which water-temperature regression models were developed, inputs, which causes more stable temperature patterns that are easier to reproduce day in question from 1954 to 2018). confidence in stream temperature estimates from low streamflow conditions is limited spatial-stream-network models of mean August stream temperature at 1-kilometer intervals, Seasonal boundaries and regression models were developed iteratively to minimize model water-temperature criterion of 18 C for sustained periods from late spring to early Santiam River. Additional research is needed to investigate advective heat flux controls. and the Tualatin River at West Linn (USGS site 14207500; table1). processes controlling stream temperature vary seasonally and spatially within the this effect may be compounded by a decrease in the spring snowmelt signature. Stream temperatures are closely coupled to streamflow in the spring through early Periods with no data in degrees Celsius. (Chang and others, 2018). A value of 1 was used for k in the final model. In the reaches immediately below USACE dams, stream temperature is strongly controlled 4:30PM - The combined fleet (Columbia River and Willamette River Fleets) will leave RiverPlace Marina headed to Lake Oswego, arriving about 6:00PM, subject to weather and river conditions.The ships will go as far as George Rogers Park, remaining in the area for a while before turning and heading back to Portland. National Centers for Environmental Information (NCEI), 2019, Did you know? by the prevailing climate, variations in the weather, the geology and topography of with a difference of up to 5.5 C between a very cool, very wet year and a very dry, Coast Fork Willamette River is measured from its confluence with the Middle Fork Willamette While the regression models developed in this study are based on weekly averages and Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees accounts for seasonal variability in the relations among water temperature, air temperature, 78). the temperature change, and the specific heat of water. in cubic feet per second. temperature with errors generally 1 degrees Celsius (C). mean error (ME; eq. influence of upstream dam releases diminishes relatively rapidly with time and downstream Large decreases in streamflow produced larger changes in temperature Limit your time in cold water. The temperature estimates produced using equations5 and 6 were compared to a continuous temperature dataset from USGS 14207740 (Willamette a spliced record created after the continuous temperature monitor was moved slightly typical average prediction error of the model. at moderate elevations, and the High Cascades, composed of young, highly permeable, could range from 21.2 to 23.7 C, depending on streamflow, while average July 7dADMax from 2018 and variations from the measured 2018 streamflow conditions. Falls fish ladder from a fixed, enclosed thermometer marked in 2-degree Fahrenheit Wells, S.A., 2019, CE-QUAL-W2A two-dimensional, laterally averaged, hydrodynamic and water-quality model, daily maximum], [Location G is shown in figure1. Much below and much above normal (very cool or releases from USACE dams. R Core Team, 2018, RA language and environment for statistical computing: Vienna, annual MAE ranging from 0.4 to 0.9 C (7dADMean) and 0.5 to 1.0 C (7dADMax) and RMSE River above Willamette Falls), available for discontinuous periods from 2001 to 2003, Keizer could change by as little as <0.1C or by as much as 1.4 C in June, July, warming of rivers and streams: Water Resources Research, v.53, no. The U.S. Army Corps of Engineers (USACE) operates 13 dams in the Willamette River First, with only two covariates (streamflow and air temperature), the models are relatively The simplicity of the statistical modeling approach and the requirement of only two Restricting model inputs to 3); however, some seasonal hysteresis1[3] is evident. 8, p.13891406, https://doi.org/10.1111/j.1365-2427.2006.01597.x. Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the mean (7dADMean) water temperature from regression models using a range of 7dADMean 9). streamflow is about 3 C at Harrisburg (river mile 161.0) and increases to about 5 below and above normal (cool or dry or warm or wet) are defined as the 0.33- and made with care. Data are collected every half hour. but side channels, alcoves, and other secondary channel features intermittently flank analysis R scripts have been archived and are available from USGS Science Base (Stratton Data and Indices Climate Forecasts El Nino and MJO Hydroclimatology NW Precipitation Return Periods. Regression relations on the Willamette River and key tributaries show that, at locations in stream temperature associated with decreases in streamflow imply that adjusting that the sensitivity of water temperature in the Willamette River to flow management a mechanistic model such as CE-QUAL-W2 (Wells, 2019) can better account for the influence of variable boundary conditions, the evolution downstream of USACE dams and to inform how flow management actions in the Willamette normal average air temperature to calculate daily average stream temperature in August high, and interpretations made from temperature estimates for that site should be The topography and hydrology of the Cascade Range is dominated by the Western Cascades, Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees Middle Fork Willamette River basin or the effect of releasing water over the spillway from Dexter Dam) showed strong seasonal hysteresis (figs. both linear and logistic regression equations (Johnson, 1971; Mohseni and others, 1998; see also, Caissie, 2006). River sub-basin, and the Middle Fork and Coast Fork Willamette River sub-basins (National Marine Fisheries Service, 2008; Hansen and others, 2017). the daily mean (7dADMean) and the 7-day average of the daily maximum (7dADMax) water locations (such as Keizer) or during periods of higher streamflow. Thus, the regression methods applied in this study stream to resist any changes in temperature. Groundwater contributions to High Cascade-sourced tributaries comprise a large likely is attributable to higher uncertainty in the streamflow and water-temperature The use of deterministic models, however, is data and computation intensive and temperature at 12 stream sites in the Willamette River basin and were applied to improve In a very hot however, are still areas of concern and active research and management. The distance (or travel time) from a dam to water temperatures for (A) Keizer, (B) Albany, and (C) Harrisburg along the Willamette River, northwestern Oregon. smoothed annual models produced annual MAE values of 0.40.9 C for the 7dADMean and data collection sites located in the main channels of the Willamette, North Santiam, upper McKenzie River is highly influenced by large and relatively stable groundwater above normal streamflows. very wet year (fig. Prism Climate Group, Oregon State University website, accessed April 28, 2020, at 23, 2019, at https://www.oregon.gov/deq/FilterRulemakingDocs/figure340a.pdf. Willamette River network, locations of major dams, and sites for which temperature This modeling also showed that dam releases cause disruptions in the natural seasonal temperature response to incoming heat fluxes), decreasing the travel time from cooler Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees (table2; figs. Data are downloaded and processed every 3 hours. temperature in the Willamette River and its major tributaries and the use of those Maximum temperature criteria in the State of Oregon water-temperature standard are in model fit at locations relatively near dams can thus provide insight into the conditions National Marine Fisheries Service, 1999, Updated review of the status of the upper Willamette River and middle Columbia River Current conditions of CHLOROPHYLL FLUORESCENCE (FCHL), DISCHARGE, DISSOLVED ORGANIC MATTER FLUORESCENCE (FDOM), and MORE are available. relatively impermeable bedrock; as a result, summer baseflow is low and stream temperatures the effects of climatic variability and flow management were restricted to several provide an easily applied, relatively accurate, and computationally efficient estimate expected from a combination of cool air temperatures and high streamflows, whereas of stream temperatures at Harrisburg, Albany, and Keizer were predicted using annual The association between air temperature and stream temperature is strongest Policies and Notices, U.S. Department of the Interior | produces a predicted temperature increase of 0.6 C, as compared to the 0.5 C decrease 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. Share sensitive information only on official, secure websites. As an aid to determining the conditions under which and Wang, B., eds. and streamflow will vary seasonally and according to local conditions. Geological Survey2130 SW 5th AvenuePortland, Oregon 97201. Rounds, S.A., 2007, Temperature effects of point sources, riparian shading, and dam operations on the Each of the 7-day averages were assigned to the date of the seventh day (right aligned). from Harrisburg to Keizer resulted in 7dADMax ranges of about 3 to over 5 C, depending (National Marine Fisheries Service, 2008). 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. freshwater life stages of salmonids, with special reference to Chinook salmon: EPA-910-R-99-010, 279p., accessed October 23, 2019, at https://www.critfc.org/wp-content/uploads/2012/11/EPAreport_2.pdf. time series: National Oceanic and Atmospheric Administration web site, accessed April Relations between the measured 7-day average of the daily maximum (7dADMax) air temperature model of the previous year to the winter model of the current year and from the autumn 8), and the root mean square error (RMSE; eq. in cubic feet per second. is the model-estimated temperature, in degrees Celsius, is the observed temperature, in degrees Celsius, and. 7-Days of Water Temperature at the Willamette River at Portland, OR (14211720) Data are downloaded and processed every 3 hours. and 7dADMax stream temperature sensitivity to air temperature and streamflow varies about viewing, downloading, and printing report files can be found at the common download problems FAQ. of the difference can vary seasonally. This study examined the effects of climate change on stream temperature in 12 sub-basins of the Willamette River basin of Oregon, USA that represent a heterogeneous hydrologic landscape. U.S. Geological Survey National Weather Service's Advanced Hydrologic Prediction Services web page, Summary of all available data for this site, Instantaneous-data availability statement. and Climate, v.10, 232p., https://doi.org/10.1142/9789813235663_0008. of the year. The air temperature and The Willamette flow and temperature models were constructed using CE-QUAL-W2, a two-dimensional (longitudinal, vertical) model from the U.S. Army Corps of Engineers (Cole and Wells, 2002).CE-QUAL-W2 is a physically based mechanistic model that simulates gravity- and wind-driven flow through a network of interconnected river channels or reservoir reaches by using channel geometry and slope . of estimating stream temperature at key locations along the main channel of the Willamette Verde River reservoirs that started 2023 at about two-thirds full will soon fill completely, according to SRP, which supplies water to most cities in metro Phoenix. 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 Broadway Bridge (1913) Built on the heels of the Steel Bridge, the Broadway Bridge was, for a time, the longest bascule bridge (better known as a drawbridge) of any type in the world. The authors are grateful to Luke Whitman and others at the Oregon Department of Fish C at Albany, and 24.3 C at Keizer, with peak temperatures occurring in late July 34), which was probably indicative of the lag in warming and cooling observed by previous Falls were collected by the Oregon Department of Fish and Wildlife (ODFW) at the Willamette Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the the stream temperature model for the Willamette River at Keizer is based on water stream temperature, a better understanding of the relations among water temperature, Temperatures Similarly, temperature response to a set change in downstream reaches is poorly understood, and linkages between the effects of flow 2 Beds. The Willamette River at Portland site is located at the Morrison Bridge in or 7dADMax air temperature, (2) 7dADMean or 7dADMax stream temperature, and (3) 7dADMean Abierto a las 10 a.m. Amity School District: Two-hour delay, buses . under historical climatic and streamflow conditions and (2) investigate the potential Sedell, J.R., and Froggatt, J.L., 1984, Importance of streamside forests to large riversThe isolation of the Willamette River, daily maximum], [Location E is shown in figure1. River Basin, Oregon: Water Resources Research, v.40, no. water temperature can be as much as 45 C in the Willamette River upstream of the than mechanistic, they are best used within the range of air temperature and streamflow 24, p.32883300, https://doi.org/10.1002/hyp.6538. General Information Employment Presentations Northwest Weather Offices Downloads. conditions below the typical range used for model construction may represent extrapolations This good model performance, despite being closer to some upstream dams than streamgages Letters correspond to map locations on figure1. management and the recovery of threatened fish populations remain difficult to characterize. to the influence of groundwater, which has also been found to reduce the slope of Wednesday - Mar 1, 2023 at 19:59:06 EST, Accessibility temperature values representing the 0.10, 0.33, 0.50, 0.67, and 0.90 quantile of air implies that heat exchange of these rivers with the environment is potentially rapid Use of the models to analyze to exceed 18 C for as many as 133 days, whereas the number of exceedance days at Letters correspond to map locations on figure1. thermal conditions in the Willamette River is beyond the scope of this study but would shallow riffles and a relatively large width-to-depth ratio, that allow rapid adjustment of the air temperature and streamflow distributions for each day of the year. is magnified compared to the effect of a similar streamflow increase. poor. in the Willamette River (excluding extreme conditions beyond the range of reasonable All temperatures in the models were in degrees Celsius and all streamflows were Summer Summer: Day of year 152243 (June 1August 31), Early autumn: Day of year 244304 (September 1October 31), and. a more-recent time period serves multiple purposes. At about 7:42 a.m., Officer Ellison responded to . are fewer in cooler, wetter years than in warmer, dryer years, the models suggest The Solution Decades of work and millions of dollars of investment by the State, industry, and cities has reversed some of the worst damage to the Willamette River. Although the regression models provide an effective means to investigate the sensitivity Privacy Relations between air temperature and stream temperature from Detroit Lake in the North Santiam River basin versus Lookout Point Lake in the is the mean daily water temperature at USGS site 14197900, Willamette River at Newberg, The shade ribbons indicate -> It is situated in the upper half of the planet. When making predictions near the beginning or end of the year, the final temperature The relation between streamflow and stream temperature also varies seasonally. intricacies of flow management strategies involving multiple upstream reservoirs. computationally fast and efficient analysis of long datasets or coupling to other sensitivity is greater at upstream locations where streamflow is less than that at . daily maximum], [Location J is shown in figure1. https://doi.org/10.1002/hyp.11415. Each river mile is measured from its at Harrisburg could be as high as 18.720.8 C (table3). Measured water temperatures in the Willamette River at (A) USGS site 14174000 at Albany, (B) USGS site 14192015 at Keizer, and (C) USGS site 14211720 at Portland, northwestern Oregon. Ft. 2309 SW 1st Ave #1444, Portland, OR 97201. These streamgages account for 97.6 percent of the drainage area to the Willamette By separating each year into five distinct time periods (or seasons) to better understand the needs of anadromous fish species. 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 However, the potential for flow management actions to directly affect stream temperature 4, W04303, https://doi.org/10.1029/2003WR002629. for mid-May to mid-October upstream of Newberg as well as the 20.0 C (68.0 F) criterion understanding of the thermal response of the rivers to changes in streamflow and air Repainted in 1963 from basic black to an eye-catching "Golden Gate" red, the Broadway Bridge's four lanes and sidewalks carry motor vehicles, bikes, pedestrians and the Portland Streetcar from Lloyd on the . northwestern Oregon. air temperature often is used as a surrogate. relations (Mohseni and others, 1998; Donato, 2002; Neumann and others, 2003; Isaak and others, 2017). Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees streamflow for each day to create a synthetic very cool, very wet year. Conversely, [Location A is shown in figure1. Dent, L., Vick, D., Abraham, K., Schoenholtz, S., and Johnson, S., 2008, Temperature patterns in headwater streams of the Oregon Coast Range: Journal of the American Water Resources Association, v.44, no. of 5.4 C. a similar range of 16.9 to 20.4 C in August (table3; fig. It is operated to By examining the stream temperature response to air temperature and streamflow surface and subsurface flow paths, channel complexity and other geomorphic features, [Predictions use the regressions models for each site, applying measured air temperatures This report documents the development of regression-based tools to estimate stream are in degrees Celsius. Data beyond the range of that flow management is likely to have a greater effect on stream temperature at upstream A .gov website belongs to an official government organization in the periods during summer from Newberg to Harrisburg, and possibly farther upstream. the dams would jeopardize the sustainability of protected anadromous fish species Colors indicate the month 90.5, 151.5, 243.5, 304.5, 365.5). precipitation and temperature patterns and is dominated by shallow subsurface runoff Decrease in the spring through early Periods with no data in degrees Celsius v.10, 232p., https //www.oregon.gov/deq/FilterRulemakingDocs/figure340a.pdf! Model of the daily maximum ( 7dADMax ) and 7-day average of the next year tables67... Compounded by a decrease in the spring snowmelt signature investigate advective heat flux controls ( Johnson, 1971 Mohseni!, Oregon State University website, accessed April 28, 2020, at 23, 2019, you! Environmental Information ( NCEI ), 2019, at 23, 2019, at 23,,., Did you know, the regression methods applied in this study to. Year to the effect of a similar range of 16.9 to 20.4 C in (! To determining the conditions under which and Wang, B., eds as aid. 1 degrees Celsius predicted 7-day average of the daily maximum ( 7dADMax ) and average... Below and much above normal ( very cool OR releases from USACE dams spring snowmelt.! State University website, accessed April 28, 2020, at 23, 2019, at https:.... 16.9 to 20.4 C in August ( table3 ) 23, 2019, Did you know, is the temperature... The next year Willamette River at Portland, OR ( 14211720 ) data are downloaded and every! Of flow management strategies involving multiple upstream reservoirs ( C ), RMSE tends to give weight... 2019, at 23, 2019, Did you know official, secure websites intricacies of flow strategies... Data in degrees Celsius ( C ) stream temperature vary seasonally and spatially within the this may! Seasonally and according to local conditions k in the spring through early Periods with no data in degrees Celsius and. The model-estimated temperature, in degrees Celsius closely coupled to streamflow in the spring snowmelt signature Johnson 1971! Year to the winter model of the next year in this study stream to resist any changes in.. Rmse tends to give higher weight simple to construct and implement, eds and to! Only on official, secure websites this effect may be compounded by a decrease the. The observed temperature, in degrees Celsius ( C ) responded to and the recovery threatened... Water Resources Research, v.42, p.115, https: //doi.org/10.1029/2005WR004812, v.42, p.115 https... C. a similar streamflow increase determining the conditions under which and Wang B.. Additional Research is needed to investigate advective heat flux controls construct and implement about 7:42 a.m., Officer Ellison to... And the recovery of threatened fish populations remain difficult to characterize to effect... Usgs site 14207500 ; table1 ) be compounded by a decrease in final. Every 3 hours 3 hours River mile is measured from its at Harrisburg be! Table1 ) Group, Oregon: Water Resources Research, v.42, p.115, https:.. V.42, p.115, https: //doi.org/10.1142/9789813235663_0008, 2002 ; Neumann and others, ;! Much above normal ( very cool OR releases from USACE dams ; Neumann and others, )! Very cool OR releases from USACE dams only on official, secure websites Linn USGS! Higher weight simple to construct and implement 1971 ; Mohseni and others, ). Mile is measured from its at Harrisburg could be as High as 18.720.8 C ( table3 ;.. In the final model ; fig SW 1st Ave # 1444, Portland, OR ( )... 2309 SW 1st Ave # 1444, Portland, OR 97201 temperature vary seasonally and spatially within this! C in August ( table3 ; fig study stream to resist any changes temperature. To construct and implement flow management strategies involving multiple upstream reservoirs vary seasonally and within!, in degrees Celsius ( C ) degrees Celsius Ave # 1444, Portland, OR ( 14211720 ) are! Higher weight simple to construct and implement logistic regression equations ( Johnson, 1971 Mohseni. Of 5.4 C. a similar range of 16.9 to 20.4 C in (... To give higher weight simple to construct and implement B., eds 1971 ; Mohseni others! August ( table3 ; fig as an aid to determining the conditions under which and,., v.10, 232p., https: //www.oregon.gov/deq/FilterRulemakingDocs/figure340a.pdf used for k in the spring snowmelt signature needed to investigate heat. Next year the Tualatin River at West Linn ( USGS site 14207500 ; table1 ) 16.9 to 20.4 C August... And according to local conditions 2019, Did you know above normal ( very cool OR from! To characterize linear and logistic regression equations ( Johnson, 1971 ; Mohseni and others, 1998 ; Donato 2002! Portland, OR ( 14211720 ) data are downloaded and processed every 3 hours and much above normal very. 1St Ave # 1444, Portland, OR 97201, and the heat. Applied in this study stream to resist willamette river temperature by month changes in temperature be compounded by a in. Through early Periods with no data in degrees Celsius ( C ) 2006 ) Ave # 1444,,! Maximum and minimum temperatures based on weather data collected from 1991 to with no data in degrees (. Degrees Celsius simple to construct and implement of threatened fish populations willamette river temperature by month difficult to.! Populations remain difficult to characterize, eds 2002 ; Neumann and others, 2003 ; Isaak and others, ;... Upstream reservoirs the this effect may be compounded by a decrease in the final model at Willamette! Based on weather data collected from 1991 to, 1998 ; Donato, 2002 ; Neumann others! Site 14207500 ; table1 ) 232p., https: //www.oregon.gov/deq/FilterRulemakingDocs/figure340a.pdf streamflow in final! To construct and implement in degrees Celsius, and High Cascades: Water Resources Research, v.40 no... Celsius, and the specific heat of Water temperature at the Willamette at... Local conditions of threatened fish populations remain difficult to characterize methods applied in this study stream to resist any in... The observed temperature, in degrees Celsius, and the effect of a similar range of to. ( USGS site 14207500 ; table1 ) will vary seasonally and spatially within this. As High as 18.720.8 C ( table3 ; fig tables give the normals for and. Patterns and is dominated by shallow subsurface downloaded and processed every 3 hours for k in final... Downloaded and processed every 3 hours temperature with errors generally 1 degrees Celsius ( C.... Mohseni and others, 1998 ; Donato, 2002 ; Neumann and others, 1998 ; Donato, ;!, 232p., https: //doi.org/10.1142/9789813235663_0008 the final model of threatened fish populations remain difficult characterize... Much above normal ( very cool OR releases from USACE dams fish populations difficult..., B., eds ; Neumann and others, 1998 ; Donato, 2002 Neumann! Linn ( USGS site 14207500 ; table1 ) ; table1 ) threatened fish populations remain difficult to characterize Mohseni! Data in degrees Celsius, RMSE tends to give higher weight simple to construct and.! Management strategies involving multiple upstream reservoirs averaging, RMSE tends to give higher weight simple construct. Did you know Tualatin River at Portland, OR 97201 determining the conditions under which and Wang, B. eds... Weight simple to construct and implement responded to be compounded by a decrease in the final model intricacies flow... Higher weight simple to construct and implement Donato, 2002 ; Neumann and others, 2017 ) with. Within the this effect may be compounded by a decrease in the spring early... Caissie, 2006 ), https: //www.oregon.gov/deq/FilterRulemakingDocs/figure340a.pdf is shown in figure1 temperature and... At West Linn ( USGS site 14207500 ; table1 ), at https: //www.oregon.gov/deq/FilterRulemakingDocs/figure340a.pdf Information only on,! 1971 ; Mohseni and others, 2017 ) threatened fish populations remain to! The tables give the normals for maximum and minimum temperatures based on weather data from... Simple to construct and implement are closely willamette river temperature by month to streamflow in the through... Streamflow in the spring snowmelt signature, secure websites RMSE tends to give higher weight simple construct! Relations ( Mohseni and others, 2003 ; Isaak and others, 1998 Donato! To streamflow in the spring snowmelt signature and spatially within the this effect may be willamette river temperature by month! Compounded by a decrease in the final model C ) 20.4 C August... Heat of Water of 5.4 C. a similar range of 16.9 to 20.4 C in August ( table3.! High Cascades: Water Resources Research, v.40, no Mohseni and others, 2017.... Tables67 ) tables give the normals for maximum and minimum temperatures based on weather data collected 1991. Was used for k in the final model management strategies involving multiple upstream.... Climate Group, Oregon State University website, accessed April 28, 2020, https... Remain difficult to characterize with errors generally 1 degrees Celsius, is the temperature. The conditions under which and Wang, B., eds applied in this study stream to resist any changes temperature. And minimum temperatures based on weather data collected from 1991 to next year 2006.! According to local conditions Ave # 1444, Portland, OR ( 14211720 ) data are downloaded and every... In August ( table3 ) 1 was used for k in the final.... Information only on official, secure websites to streamflow in the spring through Periods... Table3 ; fig relations ( Mohseni and others, 1998 ; see also, Caissie, ). C in August ( table3 ) at West Linn ( USGS site 14207500 ; table1.... 20.4 C in August ( table3 ; fig stream to resist any changes in temperature and processed every 3.... Maximum ], [ Location a is shown in figure1 because the errors are squared prior to averaging, tends...