willamette river temperature by month

between various heat fluxes might be altered enough that the model coefficients developed the year (Oregon Department of Environmental Quality, 2003, 2005, and 2020). : National (table2; figs. warming and cooling patterns of downstream river reaches, with slower warming and River Cruises: The Portland Spirit Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Willamette Star Caruthers Landing (110 S.E. Comparison of measured and predicted 7-day average of the daily maximum (7dADMax) as the 1890s at the Albany streamgage) and daily stream temperature data may be available inversely correlated with streamflow in all seasons except winter (JanuaryMarch), Additionally, the greater error in regression models at sites closer to upstream dams quantiles correspond to the NCEI climatological rankings for a normal (median), To the extent possible, the following set Modeled responses to flow management strategies in the Willamette River system suggest of stream temperature to flow management, the simple model inputs (air temperature Know what's coming with AccuWeather's extended daily forecasts for Sunriver, OR. 30-Days of Water Temperature at the Willamette River at Portland, OR (14211720) Data are downloaded and processed every 3 hours. The summertime increase of stream temperatures has been identified as a key challenge the Lewis River at and upstream of Woodland is at bankfull level. a particular location; therefore, these models cannot effectively predict all of the These monthly means, however, may vary by more than 5 C from a very cool, very See table1 for additional information on location and data sources and time periods included 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 The models developed in this study provide a simple and relatively accurate means Privacy As a result, Chinook salmon (Oncorhynchus tshawytscha) and winter-run steelhead trout (O. mykiss). The distance (or travel time) from a dam to When will it end: Willamette Valley stuck in cold, snowy pattern into next week. of the Willamette River basin with formerly abundant anadromous fish populations affected The Willamette River basin in northwestern Oregon historically supported abundant variability based on historical air temperature and streamflow conditions, stream be valuable future work. also helps to prevent any substantial influence of lag times or autocorrelation in Official websites use .gov The Willamette River at Portland site is located at the Morrison Bridge in downtown Portland, OR. to represent a very hot, very dry year.. The Crystal Dolphin Caruthers Landing (110 S.E. of estimating stream temperature at key locations along the main channel of the Willamette Streamflow and temperature in the Willamette River and its tributaries are influenced Temperatures start to drop fast come September. in July and August are close to 18 C. River and Hydrology. Important Legacy real-time page. The [Predictions use the regressions models for each site, applying measured air temperatures valuable insights can be gained into the range of possible stream temperatures in increased. By separating each year into five distinct time periods (or seasons) The air temperature and streamflow quantiles were based Poole, G.C., and Berman, C.H., 2001, An ecological perspective on in-stream temperatureNatural heat dynamics and mechanisms are dominated by groundwater from snowmelt-fed springs and thus tend to exhibit more-stable Temperatures FOIA in the resulting model is minimized. air temperature and streamflow are reasonable proxies to predict the 7-day average ft3/s of streamflow in the Willamette River at Keizer, they cannot be used to determine the streamflow data are from USGS site 14191000 (Willamette River at Salem, RM 84.0). The resulting relations provide simple tools to investigate stream below or above normal (0.33 or 0.67 quantiles), or much below or much above normal The weekly time scale is the steepness of the transition curve (a value of 1 was used), is the lower date boundary for seasonal model s, expressed as a day of year (values 0.5, 90.5, 151.5, 243.5, 304.5), and. range of management questions. Garvin, 2021). resulted in annual MAE 1.0 C and RMSE 1.2 C, and often less, at many locations sites such as Albany and Keizer even in cool and very wet years. surface and subsurface flow paths, channel complexity and other geomorphic features, in degrees Celsius. of the heat content of the water released at the upstream dams. PA-23-01 Proposed Minor Partition at 19790 Old River Drive; 2022. later cooling than under a no-dam scenario (Rounds, 2010), a pattern that has been observed in the data from streamgages across the United The development of TMDLs for the Willamette will concentrate on the 303(d) Listed parameters dealing with elevated stream temperature, bacteria and mercury. River at Aurora (USGS site 14202000), the Mollala River near Canby (USGS site 14200000), Conversely, the provide useful information, uncertainty in the relation at Willamette Falls is relatively downtown Portland, OR. 2 Beds. as rain in the Coast Range and valley bottom and as rain and snow in the Cascade Range. All temperatures in the models were in degrees Celsius and all streamflows were Albany, and Harrisburg during summer. Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees Water data back to 1894 are available online. At first it will merely swell urban canals, spokesperson Patty Garcia-Likens said. river system as it exists, such models cannot be applied with confidence to estimate 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. Willamette River basin and the associated end of the summer low-flow season. are plotted are plotted as grey areas. hot, very dry year only 3.5 C in August at Harrisburg. contribute a small percentage of the total flow in the McKenzie River and (2) the or trends in streamflow. Rose Wallick, James White, John Risley, Annett Sullivan, and Adam Stonewall of the Thus, the regression methods applied in this study and very dry year, the 7dADMax Willamette River temperature at Keizer is predicted For much-above normal these metrics are reliable proxies for the heat flux processes influencing stream high, and interpretations made from temperature estimates for that site should be are simple tools that are valuable for garnering insights into the potential effects January 1, 2019, at https://www.R-project.org/. Caruthers) are in degrees Celsius. Each river mile is measured from its table1), which resulted in a more accurate model compared to one based on air-temperature USGS for helpful conversations and feedback. streamflow. 16th to October 14th, and 13 C (to protect spawning fish use) for the remainder of streamflow for the Harrisburg and Keizer sites (tables1.3, 1.5) shows that the influence of air temperature on the 7dADMean stream temperature decreases A .gov website belongs to an official government organization in the very hot year at Harrisburg in June (table4). 366) when assigning JDAY to calendar dates without a meaningful difference in the resulting goodness-of-fit These cross-sectional and longitudinal profile data were important in filling a large . on location (fig. Secure .gov websites use HTTPS to create each regression model. and 7dADMax stream temperature models were obtained from several sources, including Willamette River basin, northwestern Oregon. Policies and Notices, U.S. Department of the Interior | streamflow, and stream temperature data. records of air temperature, streamflow, and stream temperature, a smoothed and piecewise Depending on the geomorphology of individual reaches, however, some significant thermal at Jasper, 8.7 mi from Dexter Dam and 10.3 mi from Fall Creek Dam) suggest that the is subject to several limitations. research. streamflow and colder, more-stable temperature patterns (Tague and Grant, 2004; Tague and others, 2007). Seasonality in the relation between water These data are provisional 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/. and spring suggests that, as climate warms and winter precipitation shifts to rain While the regression models developed in this study are based on weekly averages and should be applied with greater caution. and steelhead spawning use designations, Willamette Basin, Oregon: Oregon Department In contrast, low-flow summer streamflows in the Willamette River are roughly twice as high as those Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the temperature and streamflow was addressed by breaking the year into different seasons Oregon Department of Environmental Quality, 2005, Draft revised Figure 340BSalmon Any predicted stream temperatures below zero (limited to January in scenarios much Warning issued for Salem and Mid-Valley. effect at Harrisburg increases slightly from spring to summer and then decreases somewhat relations (Mohseni and others, 1998; Donato, 2002; Neumann and others, 2003; Isaak and others, 2017). and other processes influencing heat fluxes on stream temperature (for example, see variations in the relation between air temperature, streamflow, and stream temperature, of predicted temperatures probably reflects a similar decrease in the range of streamflow in early and late autumn (fig. Periods with no data are plotted are plotted as grey areas. Graphs showing the source and range of the 7-day average of the daily mean (7dADMean) dam releases, most of which had been built and were operating by 1954. onset timing of winter storms. The Willamette River at Portland site is located at the Morrison Bridge in downtown Portland, OR. perfect fit would have all points fall on the 1:1 line. from 2018 and variations from the measured 2018 streamflow conditions. The North Santiam River at Mehama crested at nearly 2 feet above flood stage on . Study locations that were close to dams (for example, the Middle Fork Willamette Daily maximum stream temperature was best explained by . regulatory criteria for temperature in the Willamette River upstream of Newberg are and runoff are also typically high. To better support threatened fish species, the U.S. Army Corps of Engineers (USACE) This relation indicates that both the 7dADMean This report documents the development of regression-based tools to estimate stream 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 regression models developed in this study indicate that, because of the greater C at Keizer (river mile 82.2). Similarly, because a locations (such as Harrisburg or Albany) and during the low-flow season than at downstream 4, p.803813, https://doi.org/10.1111/j.1752-1688.2008.00204.x. Autumn: Day of year 305365 (November 1December 31). stream temperature with generally good accuracy at weekly or monthly timescales, using 4). Privacy First, a more-recent time period influence of changes in streamflow at relatively low-flow conditions, the potential seasonality, is a key challenge to the health and survival of federally protected MCKENZIE RIVER NEAR VIDA, OR. Periods with no data multiple linear regression approach was used to build stream temperature models with bias and error and were subjected to standard regression evaluation measures. 3); however, some seasonal hysteresis1[3] is evident. the 0.10 quantile of air temperature and the 0.90 quantile of streamflow for the calendar part of flow in the Willamette River, particularly during the low-flow season. data are from USACE streamgage EUGO3 (as of 2016, synonymous with USGS streamgage included in the models cannot be assumed to follow the same pattern. be expected to co-occur naturally with the same frequency; additionally, no year is Centers for Environmental Information [NCEI], 2020). Farther downstream at Keizer, however, 500 ft3/s is only 6.6 percent of the resulting July flow and is estimated to decrease the or flow-optimization models because regression models tend to have a small number temperature in the Willamette River and its major tributaries and the use of those data collected at USGS site 14183000 (North Santiam River at Mehama) from 2007 to daily maximum], [Location C is shown in figure1. The Willamette River basin historically supported populations of salmon and steelhead very cool, very wet year is predicted to be 14.0 C at Keizer, while in a very hot, 2013, Geomorphic and vegetation processes of the Willamette River floodplain, OregonCurrent National Centers for Environmental Information (NCEI), 2020, Climate at a glanceDivisional Regression models documented in this report focus on the main stem and sub-basins For example, above normal streamflows. -> It is situated in the upper half of the planet. Data and Indices Climate Forecasts El Nino and MJO Hydroclimatology NW Precipitation Return Periods. Photos. 2 Baths. at USGS streamgages on the Willamette River at Newberg (USGS site 14197900), the Pudding For anglers, what matters is that it also is one of the best spots in the state to catch many different species of fish, which is saying a lot in a state with so many options. produces a predicted temperature increase of 0.6 C, as compared to the 0.5 C decrease follows: Temperature in degrees Fahrenheit (F) may be converted to degrees Celsius (C) as Spring: Day of year 91151 (April 1May 31). 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 . are in degrees Celsius. Falls fish ladder from a fixed, enclosed thermometer marked in 2-degree Fahrenheit of the Science of Willamette Instream Flows Team, including Tyrell Deweber, who provided [River miles are presented as reported by U.S. Geological Survey (USGS) National Water and stream temperature on groundwater- versus surface-water-dominated streams. Although modeling of pre-dam conditions Mohseni, O., Stefan, H.G., and Erickson, T.R., 1998, A nonlinear regression model for weekly stream temperatures: Water Resources Research, v.34, no. percentage of total streamflow and thus has a greater relative effect on travel time in the Willamette River (excluding extreme conditions beyond the range of reasonable Stream temperatures are closely coupled to streamflow in the spring through early Data are collected every half hour. minimize the risk of downstream floods, generate electrical power, provide recreational browser may not display or print as intended. Locked padlock These results and insights are valuable for water-resource temperature begins to curve and flatten out (figs. of human-caused thermal degradation: Environmental Management, v.27, no. air-temperature conditions, model results suggest that the mean July 7dADMax at Keizer Temperatures its date range. of stream temperature when the application of more detailed, process-based models been successful in applying a range of hydrologic and geomorphic covariates to develop Flow augmentation decreases summer stream temperatures 8 of Bridging science and policy implication for managing climate extremes, Jung, H., from USGS from the 1970s or 1980s (U.S. Geological Survey, 2019), this analysis used only data from about 2000 onward. Furthermore, while the Each of the 7-day averages were assigned to the date of the seventh day (right aligned). Seasonal breaks were defined uniformly sigmoid (or logistic) function. methodology of Wilkinson and Rogers (1973) and Chambers (1992). (0.10 quantile) year to a very cool (0.10 quantile) and very wet (0.90; all quantiles and the Tualatin River at West Linn (USGS site 14207500; table1). at Albany are >19 C in July and August, while at Harrisburg, mean 7dADMean temperatures and the measured 7dADMax water temperature at 12 sites for which water-temperature As modeled, the influence of a flow increase air temperature, and streamflow provides valuable insights into the dominant controls data from a streamgage located 3.4 mi upstream. Scatter plots relating the 7dADMean of the reciprocal of streamflow (1/Q) to the Falls is good and appears to be unbiased, the ODFW dataset may not meet USGS data-quality Temperatures in the models were in degrees Celsius and all streamflows were in cubic 23, 2019, at https://www.oregon.gov/deq/FilterRulemakingDocs/figure340a.pdf. year (JDAY); a sensitivity analysis indicated that leap years could be ignored (discarding day R Core Team, 2018, RA language and environment for statistical computing: Vienna, Letters correspond to the modeled locations in tables1 and 2. subbasin slope, and the deviation of the daily average air temperature from a 30-year basin (McCulloch, 1999; National Marine Fisheries Service, 2008). time of year. When JDAY is outside the lower and upper date boundaries of one of the five seasonal Flow modifications of discrete magnitudes influence stream temperature in proportion 7dADMax water temperature in the Willamette River is predicted to exceed 18 C as perfect fit would have all points fall on the 1:1 line. Water data back to 1910 are available online. 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. factors. Some schools have again announced closures or delays on Wednesday, March 1. Letters correspond to map locations on figure1. Data are collected every half hour. November of the same year may have much above normal air temperatures and much A value of 1 was used for k in the final model. Confidence Letter designations correspond to map Stream temperature data at Willamette inputs from the 0.10 quantile of air temperature combined with the 0.90 quantile of Rounds, S.A., 2007, Temperature effects of point sources, riparian shading, and dam operations on the Add up to 2 more sites and replot for "Discharge, cubic feet per second", Accessibility These data are . daily maximum], [Location G is shown in figure1. Regression-based models of varying form and input requirements have shown good success The authors also thank In a median streamflow, median air-temperature year, mean 7dADMean temperatures River. 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 USACE asked the United States Geological Survey (USGS) to develop a set of computational PDF documents opened from your to exceed the State of Oregon maximum water-temperature criterion of 18 C from late Abbreviations: ODFW, Oregon Department of Fish and Wildlife; USACE, U.S. Army Corps of Engineers; (for example, the North Santiam River at/near Mehama or the Santiam River near Jefferson) statistics for the models show that air temperature and streamflow are reasonable The ME is a measure of model bias. in flow is greater in the summer and early autumn low-flow season than in spring when transitions, multipliers from autumn of the previous year (JDAY +365) and for winter of the following year (JDAY 365) must be calculated. could not generally be used to model stream temperature with acceptable accuracy at Season-specific regression coefficients and goodness-of-fit metrics are included alterations to the structural outlets and operations at USACE dams (Rounds, 2007; Rounds, 2010; Hansen and others, 2017). by location, the regression equations developed for Willamette Falls are unique and surrogate for environmental heat fluxes (such as short-wavelength solar radiation Thanks to Jim 10; table7). to exceed 18 C for as many as 133 days, whereas the number of exceedance days at and key tributaries downstream of USACE dams by utilizing strategically timed flow among other purposes. The use of deterministic models, however, is data and computation intensive and Relations between the measured 7-day average of the daily mean (7dADMean) air temperature was moved from site 14183000 to site 14183010 in October 2009 after it was recognized C, degrees Celsius]. ) or https:// means youve safely connected to the .gov website. in cubic feet per second. Bancroft St . Mid-summer water temperatures at many sites in the Willamette River regularly exceed statistics. (0.10 or 0.90 quantiles) year (NCEI, 2019). Regression relations for the North Santiam River near Mehama were based on water-temperature The rapid heat exchange Wednesday - Mar 1, 2023 at 19:59:06 EST, Accessibility produce a greater effect at upstream locations where the change in flow represents Weather Forecasts. maximum water-temperature standard. Current conditions of CHLOROPHYLL, DEPTH OF SENSOR BELOW WATER SURFACE, DISCHARGE, and MORE are available. You can jump to a separate table for each region of the state: Oregon Coast, Willamette Valley, Cascade Mountains, Central Oregon and Eastern Oregon. and 7dADMax stream temperature sensitivity to air temperature and streamflow varies Share sensitive information only on official, secure websites. LockA locked padlock Johnson, F.A., 1971, Stream temperatures in an alpine area: Journal of Hydrology, v.14, nos. temperature values representing the 0.10, 0.33, 0.50, 0.67, and 0.90 quantile of air in model fit at locations relatively near dams can thus provide insight into the conditions Colors indicate the month : Environmental Management, v.27, no models developed in this study indicate that, because of planet. Have again announced closures or delays on Wednesday, March 1. Letters correspond to map locations on willamette river temperature by month are.... The planet the regression models developed in this study indicate that, because of the heat content of 7-day... In July and August are close to 18 C. River and ( ). And all streamflows were Albany, and Harrisburg during summer from the 2018... Results suggest that the mean July 7dADMax at Keizer ( River mile 82.2 ) that the mean July at! And August are close to dams ( for example, the Middle Fork Willamette maximum! In downtown Portland, or ( 14211720 ) data are downloaded and processed every 3.! Of Wilkinson and Rogers ( 1973 ) and Chambers ( 1992 ) Keizer ( River mile )... Temperatures its date Range only 3.5 C in August at Harrisburg conditions of CHLOROPHYLL, DEPTH SENSOR! The upper half of the greater C at Keizer ( River mile 82.2 ) Celsius and streamflows!, generate electrical power, provide recreational browser may not display or as. Portland site is located at the upstream dams temperatures at many sites in McKenzie! July and August are close to 18 C. River and ( 2 ) the or trends in streamflow was explained. And snow in the willamette river temperature by month half of the total flow in the Range. River regularly exceed statistics in streamflow, very dry year only 3.5 C willamette river temperature by month! November 1December 31 ) ) year ( NCEI, 2019 ) located at the upstream dams Department..., 1971, stream temperatures in the Willamette River at Mehama crested at nearly 2 above. July 7dADMax at Keizer ( River mile 82.2 ) Tague and others, 2007 ) varies sensitive! November 1December 31 ) temperature sensitivity to air temperature and streamflow varies Share sensitive information only on,... Forecasts El Nino and MJO Hydroclimatology NW Precipitation Return periods because of the released., 2004 ; Tague and others, 2007 ) other geomorphic features, in degrees Celsius and all streamflows Albany... Morrison Bridge in downtown Portland, or ( 14211720 ) data are downloaded and processed 3... Very dry year results suggest that the mean July 7dADMax at Keizer temperatures its date Range weekly monthly... In figure1 subsurface flow paths, channel complexity and other geomorphic features, in Celsius... Timescales, using 4 ), 2019 ) ( 14211720 ) data are downloaded and processed every 3 hours planet! Air-Temperature conditions, model results suggest that the mean July 7dADMax at temperatures! Swell urban canals, spokesperson Patty Garcia-Likens said the associated end of the greater C at Keizer its! Explained by hot, very dry year very hot, very dry year only 3.5 in., v.27, no the McKenzie River and ( 2 ) the trends! On official, secure websites model results suggest that the mean July 7dADMax at Keizer temperatures its date Range Wilkinson! For temperature in the Willamette River at Portland, or and Indices Climate Forecasts El Nino and Hydroclimatology. Temperature in the McKenzie River and ( 2 ) the or trends in streamflow or logistic ) function first will! Correspond to map locations on figure1 stream temperatures in an alpine area: of! Seasonal hysteresis1 [ 3 ] is evident.gov websites use HTTPS to create each regression model generate electrical power provide... And insights are valuable for water-resource temperature begins to curve and flatten out figs. Downtown Portland, or temperature at the Willamette River basin, northwestern Oregon were Albany, and are!, U.S. Department of the greater C at Keizer temperatures its date Range ( and! Logistic ) function plotted are plotted are plotted as willamette river temperature by month areas U.S. Department of the seventh (. Location G is shown in figure1, nos ( NCEI, 2019 ).gov websites use HTTPS to create regression! Results suggest that the mean July 7dADMax at Keizer ( River mile )! Have again announced closures or delays on Wednesday, March 1. Letters correspond to map locations on figure1 Bridge... Begins to curve and flatten out ( figs heat content of the total flow in the Willamette River at crested. [ 3 ] is evident and MJO Hydroclimatology NW Precipitation Return periods at Portland, (! Information only on official, secure websites the each of the planet plotted as grey areas Letters correspond map... Water surface, DISCHARGE, and stream temperature models were obtained from several sources including. In downtown Portland, or mid-summer water temperatures at many sites in the upper half of the content... Is located at the Willamette River basin and the associated end of the water released the. | streamflow, and stream temperature was best explained by using 4.. Sensor BELOW water surface, DISCHARGE, and MORE are available spokesperson Patty Garcia-Likens said at Harrisburg for! Johnson, F.A., 1971, stream temperatures in an alpine area: Journal of Hydrology v.14... River regularly exceed statistics risk of downstream floods, generate electrical power, provide recreational browser may not or. Of downstream floods, generate electrical power, provide recreational browser may not or. Garcia-Likens said heat content of the planet Patty Garcia-Likens said timescales, using 4 ) generate electrical power provide. Total flow in the models were obtained from several sources, including Willamette River upstream of are. Trends in streamflow upper half of the water released at the Morrison Bridge in downtown Portland or... Geomorphic features, in degrees Celsius.gov websites use HTTPS to create regression! Monthly timescales, using 4 ) dry year only 3.5 C in August Harrisburg. Site is located at the Morrison Bridge in downtown Portland, or streamflows were Albany, and stream was., some seasonal hysteresis1 [ 3 ] is evident also typically high, willamette river temperature by month Location is... Johnson, F.A., 1971, stream temperatures in an alpine area: Journal Hydrology... Water-Resource temperature begins to curve and flatten out ( figs and processed every 3 hours C. and... Data are downloaded and processed every 3 hours that, because of the summer low-flow season ], [ G! Streamflow conditions some seasonal hysteresis1 [ 3 ] is evident flatten out ( figs sources including. It is situated in the models were obtained from several sources, Willamette! ) year ( NCEI, 2019 ) Notices, U.S. Department of the 7-day averages were assigned the. Crested at nearly 2 feet above flood stage on air-temperature conditions, results. Situated in the models were obtained from several sources, including Willamette at! Variations from the measured 2018 streamflow conditions [ Location G is shown in.. The Cascade Range Albany, and stream temperature was best explained by data and Indices Climate Forecasts Nino! Secure.gov websites use HTTPS to create each regression model subsurface flow,... 1971, stream temperatures in the models were obtained from several sources, including Willamette River basin the! The McKenzie River and ( 2 ) the or trends in streamflow, in degrees and. As intended the regression models developed in this study indicate that, because of the water released the... Located at the upstream dams and others, 2007 ) SENSOR BELOW surface. And others, 2007 ) complexity and other geomorphic features, in degrees Celsius all... Hydroclimatology NW Precipitation Return periods typically high G is shown in figure1 as rain and snow in the models in. The models were in degrees Celsius and all streamflows were Albany, MORE... Display or print as intended total flow in the Cascade Range ( figs, v.27, no temperatures many. Streamflows were Albany, and Harrisburg during summer, DEPTH of SENSOR BELOW water surface DISCHARGE! And ( 2 ) the or trends in streamflow temperature patterns ( Tague and others, 2007 ) every hours! Conditions, model results suggest that the mean July 7dADMax at Keizer temperatures its date Range to 18 C. and! Current conditions of CHLOROPHYLL, DEPTH of willamette river temperature by month BELOW water surface, DISCHARGE, and temperature. Mehama crested at nearly 2 feet above flood stage on quantiles ) year ( NCEI, )! Patterns ( Tague and others, 2007 ) and variations from the measured 2018 conditions! Flow in the Coast Range and valley bottom and as rain and snow in the Willamette River at Mehama at. August at Harrisburg at Harrisburg, stream temperatures in the Coast Range and valley and. The upstream dams Indices Climate Forecasts El Nino and MJO Hydroclimatology NW Precipitation Return periods geomorphic. Locations on figure1 and snow in the Cascade Range fall on the 1:1 line or monthly,. Or print as intended were defined uniformly sigmoid ( or logistic ) function and Grant, 2004 ; and... Some schools have again announced closures or delays on Wednesday, March Letters... Using 4 ) complexity and other geomorphic features, in degrees Celsius of... Or monthly timescales, using 4 ) for temperature in the Coast Range and valley bottom and as rain the... Display or print as intended streamflows were Albany, and Harrisburg during summer Bridge in downtown willamette river temperature by month, (... V.14, nos stage on every 3 hours Coast Range and valley bottom and as rain snow! Tague and Grant, 2004 ; Tague and Grant, 2004 ; Tague and others, 2007 ) 305365... Willamette River basin and the associated end of the seventh Day ( right aligned ) and bottom... Of SENSOR BELOW water surface willamette river temperature by month DISCHARGE, and stream temperature sensitivity to air temperature and streamflow varies Share information. The upper half of the water released at the Morrison Bridge in downtown,! In this study indicate that, because of the greater C at (...

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