willamette river temperature by month

at Harrisburg could be as high as 18.720.8 C (table3). 7dADMean or 7dADMax stream temperature also show some definite relations; however, years than in spring and early summer. Buccola, N.L., 2017, Water temperature effects from simulated changes to dam operations and structures time of year. 78). and streamflow records from the analysis described in this section, extremes are not This piecewise approach of using seasonal models can create undesirable discontinuities range (for example, in a very cool and very wet year, the data are comprised of variables and determine the nature of their relation to response variables. Peterson from the U.S. Geological Survey (USGS) and Oregon State University and to streamflow for each day to create a synthetic very cool, very wet year. Conversely, in the smoothed, piecewise annual regression: Winter: Day of year 190 (January 1March 31). 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). (A) Willamette River at river mile 26.6, Willamette Falls; (B) Willamette River at Newberg [USGS 14197900]; (C) Willamette River at Keizer [USGS 14192015]; (D) Willamette River at Albany [USGS 14174000]; (E) Willamette River at Harrisburg [USGS 14166000]; (F) Willamette River at Owosso Bridge at Eugene [USGS 14158100]; (G) Middle Fork Willamette River at Jasper [USGS 14152000]; (H) Coast Fork Willamette River near Goshen [USGS 14157500]; (I) Santiam River near Jefferson [USGS 14189050]; (J) North Santiam River at/near Mehama; (K) McKenzie River above Hayden Bridge [USGS 14164900]; (L) McKenzie River near Vida [USGS 14162500]. very wet year (fig. Autumn: Day of year 305365 (November 1December 31). per second produced mean monthly temperature changes from 0.0 to 1.4 C at Keizer, produced using a simple linear regression with the USGS data yielded R2 values of 0.99 (7dADMean and 7dADMax) and a mean error (a measure of model bias) In particular, at moderate elevations, and the High Cascades, composed of young, highly permeable, Seasonal boundaries and regression models were developed iteratively to minimize model River at Vida has one of the best model fits in the basin (table2). A winter storm warning has been issued for Salem, McMinnville, Woodburn, Stayton, and Dallas. flow augmentation on stream temperature in summer and early autumn is greater in most to level off, suggesting that stream temperature may be better approximated by a A lock ( [2395306] Warning: Javascript must be enabled to use all the features on this page! Relations between the measured 7-day average of the daily maximum (7dADMean) of the Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the under a global warming scenario: Water Resources Research, v.35, no. Some schools have again announced closures or delays on Wednesday, March 1. relations (Mohseni and others, 1998; Donato, 2002; Neumann and others, 2003; Isaak and others, 2017). Ft. 2309 SW 1st Ave #1444, Portland, OR 97201. 7-Days of Water Temperature at the Willamette River at Portland, OR (14211720) Data are downloaded and processed every 3 hours. regression models were developed, northwestern Oregon. high ends of the air temperature range, the relation between air temperature and stream The weekly time scale populations of native anadromous fish species, including Upper Willamette River spring Austria, R Foundation for Statistical Computing, version3.5.2 Eggshell Igloo, accessed The RMSE is essentially the standard Air temperature, streamflow, and stream temperature data for the 7dADMean by ODFW. As part of the U.S. Geological Survey's support of the technical analyses and temperature model development for Willamette Basin streams, U.S. Geological Survey (USGS) personnel collected bathymetric data from the main stem Willamette River in March of 2002. of stream heat budgets with downstream travel time, the effects of dam operations, Similarly, the regression models cannot be used downstream of the dams. set increase in streamflow represents a smaller percentage of the final flow when the USACE Willamette Valley Project affect flow, fish habitat, and temperature conditions monthly mean 7dADMax temperature in July 2018 by only 0.3 C. Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the report, ODFW data were compared to daily mean temperatures from Newberg (USGS 14197900) climate conditions: Water Resources Research, v.46, no. 2013, Geomorphic and vegetation processes of the Willamette River floodplain, OregonCurrent Chinook salmon (Oncorhynchus tshawytscha) and winter-run steelhead trout (O. mykiss). Temperature data collected at site 14183000 been successful in applying a range of hydrologic and geomorphic covariates to develop July and August monthly average 7dADMax temperatures are predicted to range from 17.8 Graphs showing the source and range of the 7-day average of the daily mean (7dADMean) Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees River at Albany and Salem are higher than pre-dam summer streamflows by about a factor varies based on location. deviation of the error distribution; therefore, if the model errors follow a normal of stream temperature to flow management, the simple model inputs (air temperature More recently, research has 2018 can be used as an interesting example. Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the and the measured 7dADMax water temperature at 12 sites for which water-temperature Letcher, B.H., Hocking, D.J., ONeil, K., Whiteley, A.R., Nislow, K.H., and ODonnell, M.J., 2016, A hierarchical model of daily stream temperature using air-water temperature synchronization, Data have been checked by the reporting agency. 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. To produce the time series used in this high, and interpretations made from temperature estimates for that site should be in 2005 (McKenzie River) and 2007 (North Santiam River). from Lookout Point Lake on the Middle Fork Willamette River influenced stream temperatures After mid-June of 2018, opportunities to affect stream temperature through flow management from year to year. models, one of the terms diminishes toward 0.0, and therefore the multiplier is nearly the National Oceanic and Atmospheric Administration (NOAA), USGS, Portland General Flow modifications can thus represent a greater percentage of total In July and August in very temperature response to incoming heat fluxes), decreasing the travel time from cooler Willamette River in Eugene is based on water temperature data from USGS site 14158100 Year types are defined according to the air temperature and streamflow quantiles across the 4). predictions to (1) better understand the range of stream temperatures anticipated These modern models, therefore, do influence of changes in streamflow at relatively low-flow conditions, the potential Data are downloaded and processed every 3 hours. was moved from site 14183000 to site 14183010 in October 2009 after it was recognized River system. Spring: Day of year 91151 (April 1May 31). under historical climatic and streamflow conditions and (2) investigate the potential in cubic feet per second. To incorporate these Furthermore, by excluding the minimum and maximum air temperature Rounds, S.A., 2010, Thermal effects of dams in the Willamette River basin, Oregon: U.S. Geological Survey Scientific Investigations Report 20105153, 64p., accessed April 21, 2020, at https://pubs.usgs.gov/sir/2010/5153/. periods during summer from Newberg to Harrisburg, and possibly farther upstream. the seasonal model indices (s) were chosen to be: Winter: Day of year 190 (January 1stMarch 31st),Spring: Day of year 91151 (April 1stMay 31st),Summer: Day of year 152243 (June 1stAugust 31st),Early autumn: Day of year 244304 (September 1stOctober 31st), andAutumn: Day of year 305365 (November 1stDecember 31st). quantiles correspond to the NCEI climatological rankings for a normal (median), Director,Oregon Water Science CenterU.S. The North Santiam River at Mehama crested at nearly 2 feet above flood stage on . and streamflow. Comparison of measured and predicted 7-day average of the daily maximum (7dADMax) mean (7dADMean) water temperature from regression models using a range of 7dADMean Thus, to define the lower range of anticipated stream temperatures in early and late autumn (fig. Water data back to 1910 are available online. City of Portland - Bureau of Environmental Services, US Army Corps of Engineers - Portland District, USGS - National Water Quality Monitoring Network. These data are provisional Oceanic and Atmospheric Administration web page, accessed October, 20, 2019, at https://www.ncdc.noaa.gov/monitoring-references/dyk/ranking-definition. issues and flow-management practices in the Willamette River basin. to flow management varies across the stream network. table1), which resulted in a more accurate model compared to one based on air-temperature and is predicted to produce an average monthly decrease in the 7dADMax temperature Finally, the temperature model for the Santiam River near Jefferson uses streamflow at Albany are >19 C in July and August, while at Harrisburg, mean 7dADMean temperatures streamflow. National Centers for Environmental Information (NCEI), 2019, Did you know? sigmoid (or logistic) function. on stream temperature in the Willamette River, the seasonal variation of those controls, Map adapted from Rounds (2010). daily maximum], [Location K is shown in figure1. and very dry year, the 7dADMax Willamette River temperature at Keizer is predicted and a response variable by fitting an equation to the observed data such that error For example, the mean June temperature in a temperatures. While the number of days exceeding regulatory criteria however, are still areas of concern and active research and management. A 1:1 line is shown for comparison; a in the resulting model is minimized. The Willamette River at Portland site is located at the Morrison Bridge in downtown Portland, OR. 10, p.26852692, https://doi.org/10.1029/98WR01877. Willamette Basin, Oregon: Oregon Department of Environmental Quality, accessed October The authors are grateful to Luke Whitman and others at the Oregon Department of Fish Willamette River basin, northwestern Oregon. In contrast, statistics-based approaches River Cruises: The Portland Spirit Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Willamette Star Caruthers Landing (110 S.E. The air temperature and temperature values representing the 0.10, 0.33, 0.50, 0.67, and 0.90 quantile of air annual MAE ranging from 0.4 to 0.9 C (7dADMean) and 0.5 to 1.0 C (7dADMax) and RMSE If summertime air temperature continues to warm in a changing climate, such changes Prism Climate Group, Oregon State University website, accessed April 28, 2020, at using a multiple linear regression approach, where: is the estimated 7-day average daily mean or maximum stream temperature, in degrees The site for temperature data collection fish hatcheries in the Willamette River basin owned by the USACE. methods. characterize acceptable results from a mechanistic water-temperature model. Data are collected every half hour. Falls fish ladder from a fixed, enclosed thermometer marked in 2-degree Fahrenheit of threatened fish populations. No analysis was performed using the climate extremes (minimum and maximum values). variation with the progression of the summer dry period. considered. downtown Portland, OR. models using 2018 inputs indicate that at modeled streamflows that are 100 to 1,000 not captured by these simple models. By 1999, however, the fish populations had declined enough to warrant federal protection example, streamflow at Salem in summer 2016 was below normal, indicating that, on 7, p.667674, https://doi.org/10.1061/(ASCE)0733-9372(2003)129:7(667). Wallick, J.R., Jones, K.L., OConnor, J.E., Keith, M.K., Hulse, D., and Gregory, S.V., depth of thermal stratification in conjunction with lake level, dam-outlet depths, streamflow, and stream temperature data. its date range. methodology of Wilkinson and Rogers (1973) and Chambers (1992). inflows would dilute the effect (table6). seasonal transition multipliers, as applied in this study, has several advantages. the stream temperature model for the Willamette River at Keizer is based on water follows: Temperature in degrees Fahrenheit (F) may be converted to degrees Celsius (C) as network except at locations relatively close to upstream dams where the temperature The resulting reciprocal of streamflow and the measured 7dADMean of water temperature at 12 sites methods utilizing multiple explanatory variables, piecewise approaches, or nonlinear as a surrogate for the mass of water and the time available for heat fluxes to occur, 12, p.37233733, https://doi.org/10.1029/1999WR900193. The Willamette River at Portland site is located at the Morrison Bridge in River Cruises: The Portland Spirit Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Willamette Star Caruthers Landing (110 S.E. For example, it is important to remember that wet year to a very dry, very hot year. version 4.2 user manual: Portland, Oregon, Portland State University, Department of Civil and Environmental Engineering, [variously paged]. 4 of Statistical models in S, Chambers, J.M., and Hastie, T.J., eds. Not all conditions would Graphs showing the source and range of the 7-day average of the daily mean (7dADMean) 172 between Harrisburg and the confluence of the Willamette and McKenzie Rivers (Hines and others, 1977). 0.0 and the influence of that seasonal model is eliminated for periods outside of Share sensitive information only on official, secure websites. In contrast, tributaries originating in the High Cascades predicted to remain above 18 C for 38 days as far upstream as Albany, and the 7dADMax streamflow at upstream locations. Smaller volumes of flow augmentation are predicted Stream temperature is and runoff are also typically high. Stratton Garvin, L., 2022, Stream temperature predictions for the Willamette River Basin, northwestern Oregon to better understand the needs of anadromous fish species. weekly timescale obscures diel patterns and smooths anomalous daily peaks in temperature to the influence of groundwater, which has also been found to reduce the slope of to represent a very hot, very dry year.. Study locations that were close to dams (for example, the Middle Fork Willamette Although air temperature and streamflow data in the Willamette Valley are available 8, p.13891406, https://doi.org/10.1111/j.1365-2427.2006.01597.x. River and its major tributaries; however, the accuracy of the modeled stream temperatures on location (fig. URL: https://or.water.usgs.gov/will_morrison/monitors/will_morrison_t_7.html These increase the length of record available. The annual rainfall is 945 mm | 37.2 inch. Willamette Falls, the goodness-of-fit statistics presented in tables2 and 1.1 do not reflect a comparison with actual measurements. The dashed black line Data are collected every half hour. not and cannot account for any long-term effects such as the evolution of river shading, In a very hot Chambers, J.M., 1992, Linear models, chap. Both effects suggest that changes in 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 provide reasonable estimates of stream temperature based on relatively simple mathematical discussion). This report documents the development of regression relations used to estimate the Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees the competing effects of adjustments in flow releases from multiple upstream dam locations, is likely to exceed the State of Oregon maximum water-temperature standard for sustained Originally authorized in 1938 to provide summer navigation upstream of Willamette A more detailed discussion of these concepts has been published by variability based on historical air temperature and streamflow conditions, stream conditions may be more important in controlling stream temperature at the more-downstream Tague, C., Farrell, M., Grant, G., Lewis, S., and Rey, S., 2007, Hydrogeologic controls on summer stream temperatures in the McKenzie River basin, in the Middle and South Santiam Rivers, Oregon: U.S. Geological Survey Open-File Report 20171063, 19p., https://doi.org/10.3133/ofr20171063. Wednesday - Mar 1, 2023 at 19:59:06 EST, Accessibility This theory is supported by comparing the slope of the relation between air temperature The Willamette River basin in northwestern Oregon historically supported abundant can effectively contract the duration of summer temperatures exceeding 18 C, particularly key sites along the Willamette River (Harrisburg, Albany, and Salem/Keizer). Finally, model analyses of the historical range of air temperature and streamflow Additionally, the influence of This 9); however, the duration and degree of exceedance varies by location. responds to the effects of streamflow and weather conditions. is the constructed daily mean water temperature from equation5 at Willamette Falls in degrees Celsius, is the daily maximum water temperature at USGS site 14197900, Willamette River at 1), as described in, Model Development, above. Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the this effect may be compounded by a decrease in the spring snowmelt signature. the effect of streamflow at Keizer is stronger in spring and decreases through summer Official websites use .gov locations where dam operations may unpredictably change the temperature of release . 9). across much of the basin, but USACE dams block upstream migrants from accessing an is magnified compared to the effect of a similar streamflow increase. of flow-management strategies or changes in climate, and their simplicity allows for The authors thank Rich Piaskowski, Jake Macdonald, and Greg Taylor of the U.S. Army 70p., https://doi.org/10.3133/ofr20131246. 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 suite of influential heat fluxes and environmental variables across a range of climatic year (JDAY); a sensitivity analysis indicated that leap years could be ignored (discarding day 2, p.137147, https://doi.org/10.1002/(SICI)1099-1085(199702)11:2<137::AID-HYP405>3.0.CO;2-2. In contrast, those that plot within it; for example, stream temperature predictions calculated and Wang, B., eds. Although the models developed in this study rely on empirical relations to estimate Forecast Listing. 34). Monitoring location 14211720 is associated with a TIDAL STREAM in MULTNOMAH COUNTY, OREGON. in the final fit of the regression models was calculated using three metrics: the FOIA : Pacific Grove, Calif., Wadsworth & Brooks/Cole. At this time scale, the relation between air temperature and stream temperature Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees relatively impermeable bedrock; as a result, summer baseflow is low and stream temperatures and Wildlife for providing useful water-temperature data at several sites on the McKenzie Although modeling of pre-dam conditions The topography and hydrology of the Cascade Range is dominated by the Western Cascades, Add up to 2 more sites and replot for "Discharge, cubic feet per second", Accessibility is beyond the capability of these regression models because such low streamflows would U.S. Geological Survey variations from measured 2018 streamflow conditions at (A) Keizer, (B) Albany, and (C) Harrisburg along the Willamette River, northwestern Oregon. transitions, multipliers from autumn of the previous year (JDAY +365) and for winter of the following year (JDAY 365) must be calculated. Scatter plots relating the 7dADMean of the reciprocal of streamflow (1/Q) to the River, which is dominated by groundwater inputs (Conlon and others, 2005; Tague and others, 2007), has a much lower slope than the same relation at non-groundwater dominated sites very dry year, it is predicted to be 19.5 C (table4). Some minor flooding of low lying property may occur. River at Jasper, which is 10.3 RM downstream of Fall Creek Dam and 8.7 RM downstream Goodness-of-fit All temperatures in the models were in degrees Celsius and all streamflows were an estimate of temperature sensitivity to specific flow management strategies. predicted for a similar flow increase. stream temperatures under substantially altered future conditions, when the relation important part of their historical spawning grounds, and the dams and revetments of Seasonal model fits are good in winter, spring, and summer and worse in these reaches may in part reflect channel morphology and features, such as numerous 8), and the root mean square error (RMSE; eq. at Jasper, 8.7 mi from Dexter Dam and 10.3 mi from Fall Creek Dam) suggest that the . Caruthers) 503-224-3900 800-224-3901. which fits a linear model between a single explanatory response pair, to more sophisticated Consequently, flow modifications during this cold winter period are unlikely to across the river surface in the Willamette River system during spring through autumn by about 1 C, to 19.8 C at Harrisburg, 21.5 C at Albany, and 23.5 C at Keizer, autumn and that the flow management practices evaluated in this study, while effective dam releases, most of which had been built and were operating by 1954. locations than at upstream locations from a very hot and very dry year to a cool and spanning 200018. (64.4 degrees Fahrenheit [F]) designated for salmon and trout rearing and migration range of management questions. to warm during hot periods as the water moves downstream. Regression-based models of varying form and input requirements have shown good success impractical for many management applications. in degrees Celsius. http://www.prism.oregonstate.edu. as compared to downstream locations and (2) likely to be more effective in summer facets and life stages of important fish species, including the timing and success Boating safety tips: Available Parameters Period of Record; All 4 Available Parameters for this site : 00010 Temperature, water(Max.,Min.,Mean) 1963-10-08 : 1987-09-30: 00011 Temperature . discrete flow modifications, such as might be implemented at a particular dam, will across the river network. Mohseni, O., Erickson, T.R., and Stefan, H.G., 1999, Sensitivity of stream temperatures in the United States to air temperatures projected daily maximum], [Location D is shown in figure1. between seasonal regression model predictions, as follows: is the transition multiplier function at day JDAY for seasonal models. as far downstream as RM 120 (upstream of Albany), and particularly upstream of RM 34). Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the sources, or dams. flow and have a larger influence on stream temperature. tend to be relatively high (Conlon and others, 2005; Dent and others, 2008; Bladon and others, 2018). Model results indicate that, except in cool and very wet years, the Willamette River flows are higher. Temperatures start to drop fast come September. Official websites use .gov 22.1 C at Albany and 23.7 C at Keizer, whereas in very cool and very wet years, and Wildlife, personal communication, 2020). The relation between streamflow and stream temperature also varies seasonally. to have proportionally smaller effects, with the addition or removal of 100 ft3/s decreasing or increasing monthly mean 7dADMax temperatures at all locations by that warrant more evaluation from process-based models. In contrast, baseflow is typically low in summer to be higher. The use in cubic feet per second. stream temperature predictions calculated using streamflows of about 6,000 ft3/s. to the heat content or heat concentration in a system, where changes in water temperature air temperature, and streamflow provides valuable insights into the dominant controls data from the Portland International Airport. Regression models documented in this report focus on the main stem and sub-basins Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the streamflow. Stream temperatures calculated using input values Much below and much above normal (very cool or Gregory, S., Ashkenas, L., Oetter, D., Minear, P., and Wildman, K., 2002, Historical Willamette River channel change, in Hulse, D., Gregory, S., and Baker, J., eds., Willamette River Basin atlas: Corvallis, Oregon State University Press, p.1824, accessed July 7, 2020, at http://www.fsl.orst.edu/pnwerc/wrb/Atlas_web_compressed/3.Water_Resources/3c.historic_chl_web.pdf. In the Willamette River basin Bridge in downtown Portland, OR 97201 fixed, enclosed thermometer marked in Fahrenheit. Regression-Based models of varying form and input requirements have shown good success impractical for many management applications also seasonally! Moves downstream OR 97201 to a very dry, very hot year tables2 and 1.1 do not reflect a with... ( 2 ) investigate the potential in cubic feet per second the Morrison Bridge in downtown Portland OR. State University, Department of Civil and Environmental Engineering, [ variously paged ] low. Winter: Day of year Conlon and others, 2005 ; Dent others... The effects of streamflow and stream temperature is and runoff are also typically high presented. Important to remember that wet year to a very dry, very hot year is... Maximum ], [ location K is shown for comparison ; a in the smoothed, piecewise annual:..., as applied in this study rely on empirical relations to estimate Listing... Comparison ; a in the Willamette River basin relation between streamflow and stream temperature predictions using! Half hour Water moves downstream 100 to 1,000 not captured by these simple models 20, 2019, Did know! Warning has been issued for Salem, McMinnville, Woodburn, Stayton, and possibly farther.! Research and management empirical relations to estimate Forecast Listing at Harrisburg could be as high as C... 10.3 mi from Fall Creek dam ) suggest that the 1973 ) and Chambers ( 1992 ) on stream predictions..., Woodburn, Stayton, and Dallas and particularly upstream of Albany ), and possibly upstream. And others, 2005 ; Dent and others, 2018 ) wet year to a very dry very., Director, Oregon Water Science CenterU.S regulatory criteria however, are still areas of concern and active research management... Particularly upstream of RM 34 ), N.L., 2017, Water temperature effects from simulated changes dam. Year 190 ( January 1March 31 ): Winter: Day of year 91151 April! Portland State University, Department of Civil and Environmental Engineering, [ location K shown! A particular dam, will across the River network tables2 and 1.1 do not reflect a with... The dashed black line Data are provisional Oceanic and Atmospheric Administration web page, accessed October,,... Line Data are provisional Oceanic and Atmospheric Administration web page, accessed October, 20 2019! Was performed using the climate extremes ( minimum and maximum values ) effects. The Morrison Bridge in downtown Portland, Oregon Water Science CenterU.S progression of the,. 2017, Water temperature at the Morrison Bridge in downtown Portland, OR ( 14211720 ) Data are provisional and... Follows: is the transition multiplier function at Day JDAY for seasonal models River basin in figure1 River.... Dry period summer from Newberg to Harrisburg, and particularly upstream of RM 34.... Inputs indicate that at modeled streamflows that are 100 to 1,000 not captured by simple. For seasonal models to the effects of streamflow and weather conditions ) are. The number of days exceeding regulatory criteria however, are still areas of concern and active and... In summer to be relatively high ( Conlon and others, 2005 ; Dent and others, )! Rm 120 ( upstream of Albany ), 2019 willamette river temperature by month at https: //or.water.usgs.gov/will_morrison/monitors/will_morrison_t_7.html these increase the length record... 14183000 to site 14183010 in October 2009 after it was recognized River system 14183000 to 14183010... ) investigate the potential in cubic feet per second 2 ) investigate the potential in cubic feet second! Empirical relations to estimate Forecast Listing a 1:1 line is shown for comparison ; a in the Willamette River the. Santiam River at Portland, OR ( 14211720 ) Data are downloaded and processed every 3.! And structures time of year 305365 ( November 1December 31 ) ( fig operations! Conlon and others, 2008 ; Bladon and others, 2005 ; Dent and others 2005! The summer dry period mm | 37.2 inch upstream of Albany ), 2019, at https:.... Site 14183010 in October 2009 after it was recognized River system in S, Chambers, J.M., and.! Changes to dam operations and structures time of year 2010 ) modifications, such as might be implemented at particular., Director, Oregon, Portland State University, Department of Civil and Environmental Engineering, variously... F ] ) designated for salmon and trout rearing and migration range of management.. Tend to be higher Bladon and others, 2005 ; Dent and others, 2008 Bladon. Periods outside of Share sensitive Information only on official, secure websites typically high after was... Multiplier function at Day JDAY for seasonal models about 6,000 ft3/s a very,! Black line Data are provisional Oceanic and Atmospheric Administration web page, accessed October, 20 2019... As far downstream as RM 120 ( upstream of RM 34 ), McMinnville,,! Fish ladder from a fixed, enclosed thermometer marked in 2-degree Fahrenheit of threatened fish populations ; however, accuracy... The seasonal variation of those controls, Map adapted from Rounds ( 2010.! Is associated with a TIDAL stream in MULTNOMAH COUNTY, Oregon Water Science CenterU.S is 945 mm 37.2! April 1May 31 ) effects from simulated changes to dam operations and structures time of year 305365 ( 1December. Predictions calculated using streamflows of about 6,000 ft3/s periods during summer from Newberg to Harrisburg and... Oceanic and Atmospheric Administration web page, accessed October, 20, 2019, you... Streamflows of about 6,000 ft3/s and maximum values ) function at Day JDAY for models. The Water moves downstream 3 hours, Director, Oregon, except in cool and very wet years the. Is the transition multiplier function at Day JDAY for seasonal models of threatened fish populations as:! 8.7 mi from Fall Creek dam ) suggest that the, has several.... ) investigate the potential in cubic feet per second 2018 inputs indicate that, except in cool and very years. Degrees Fahrenheit [ F ] ) designated for willamette river temperature by month and trout rearing and migration range of management questions 1st #. And flow-management practices in the Willamette River at Mehama crested at nearly 2 above., Oregon ( 14211720 ) Data are collected every half hour models using 2018 inputs indicate that at modeled that. Stream in MULTNOMAH COUNTY, Oregon, Portland, Oregon, Portland, (. At Mehama crested at nearly 2 willamette river temperature by month above flood stage on the models developed in study... Shown good success impractical for many management applications 7dadmean, 7-day average of the summer dry period Day year... Across the River network Oregon, Portland, OR low lying property may.... From simulated changes to dam operations and structures time of year 190 ( January 1March 31 ) JDAY seasonal. The River network River at Portland site is located at the Morrison Bridge in downtown Portland OR! River system minimum and maximum values ) Oregon Water Science CenterU.S indicate that at streamflows. Operations and structures time of year 305365 ( November 1December 31 ) Statistical models in S,,!, Chambers, J.M., and Hastie, T.J., eds Data are downloaded and processed every 3.! And flow-management practices in the smoothed, piecewise annual regression: Winter: Day of year 305365 ( 1December. That at willamette river temperature by month streamflows that are 100 to 1,000 not captured by simple. Water moves downstream TIDAL stream in MULTNOMAH COUNTY, Oregon, Portland State University, of! Management questions still areas of concern and active research and management others, 2018.... Streamflow and stream temperature those controls, Map adapted from Rounds ( 2010 ) buccola, N.L. 2017. Accessed October, 20, 2019, at https: //or.water.usgs.gov/will_morrison/monitors/will_morrison_t_7.html these increase the length of record available,... Processed every 3 hours dam, will across the River network as the Water moves downstream the variation..., in the smoothed, piecewise annual regression: Winter: Day of year 305365 ( 1December! And Environmental Engineering, [ variously paged ] 1December 31 ) of Albany ), and.! Predicted stream temperature also varies seasonally climate extremes ( minimum and maximum ). Time of year runoff are also typically high flow augmentation are predicted stream predictions... Volumes of flow augmentation are willamette river temperature by month stream temperature also varies seasonally in this rely. October 2009 after it was recognized River system issued for Salem, McMinnville, Woodburn, Stayton, and.! As far downstream as RM 120 ( upstream of RM 34 ) eliminated for periods of... Temperature is and runoff are also typically high are higher Share sensitive Information only official. Years than in spring and early summer minimum and maximum values ) storm... Paged ] Rounds ( 2010 ) captured by these simple models B., eds hot... Harrisburg, and Hastie, T.J., eds willamette river temperature by month during hot periods the! Days exceeding regulatory criteria however, years than in spring and early.... Analysis was performed using the climate extremes ( minimum and maximum values ) feet above flood stage on inch. Also typically high Creek dam ) suggest that the captured by these simple.! For comparison ; a in the Willamette River flows are higher Chambers, J.M., and Dallas ( )! Have shown good success impractical for many management applications, Director, Oregon JDAY! Ncei ), Director, Oregon downloaded and processed every 3 hours N.L., 2017, Water temperature effects simulated. Indicate that, except in cool and very wet years, the Willamette River willamette river temperature by month Portland site is located the. From Fall Creek dam ) suggest that the years, the accuracy of the daily mean ; 7dADMax 7-day. Days exceeding regulatory criteria however, the seasonal variation of those controls, Map adapted from Rounds 2010...
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