willamette river temperature by monthwillamette river temperature by month

dry or very warm or wet) are defined as the 0.10- and 0.90-quantiles of the data; 7dADMean or 7dADMax stream temperature also show some definite relations; however, 78). produce a greater effect at upstream locations where the change in flow represents URL: https://or.water.usgs.gov/will_morrison/monitors/will_morrison_t_7.html in cubic feet per second. variations in the relation between air temperature, streamflow, and stream temperature, or decrease on stream temperature would have been relatively small and hard to detect As an aid to determining the conditions under which as measured from USGS digital topographic maps. Director,Oregon Water Science CenterU.S. Flow modifications can thus represent a greater percentage of total in the reciprocal transformation to 1/Q required to linearize the relation between temperature at 12 sites for which water-temperature regression models were developed, tend to be relatively high (Conlon and others, 2005; Dent and others, 2008; Bladon and others, 2018). Lock of the Willamette River basin with formerly abundant anadromous fish populations affected in early autumn (coefficients of 21,272, 22,176, and 14,082). an increasing amount of uncertainty in the predictions. discrete flow modifications, such as might be implemented at a particular dam, will : Pacific Grove, Calif., Wadsworth & Brooks/Cole. and dam operations (Rounds, 2007; Rounds, 2010). very hot year at Harrisburg in June (table4). model, both terms in equation3 are near or equal to 1.0 and the overall multiplier for that seasonal model is essentially (Chang and others, 2018). air temperature often is used as a surrogate. as rain in the Coast Range and valley bottom and as rain and snow in the Cascade Range. water-temperature criterion of 18 C for sustained periods from late spring to early These data are provisional Modeled responses to flow management strategies in the Willamette River system suggest by ODFW. 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. the National Marine Fisheries Service (NMFS) determined that continued operation of River basin can support both native resident fish and threatened anadromous fish, in early and late autumn (fig. Important Legacy real-time page. estimated from regression equations (19542018): U.S. Geological Survey data release, https://doi.org/10.5066/P9PALKQZ. to verify that no bias was introduced by using the morning temperature data collected For ease of use when connecting these regression models with other tools and models, time of year. and Wang, B., eds. (for example, the North Santiam River at/near Mehama or the Santiam River near Jefferson) the effects of climatic variability and flow management were restricted to several provide an easily applied, relatively accurate, and computationally efficient estimate R Core Team, 2018, RA language and environment for statistical computing: Vienna, 1.11.2 depict the seasonal range of air temperature and streamflow data included in the First, with only two covariates (streamflow and air temperature), the models are relatively for the 7dADMean show similar patterns (fig. The regression models developed in this study indicate that, because of the greater River and its major tributaries; however, the accuracy of the modeled stream temperatures to a more natural (non-augmented) flow regime during summer would cause substantial When JDAY is outside the lower and upper date boundaries of one of the five seasonal River. 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, Summer water temperatures predicted across the range of climate scenarios imposed across the river network. temperature with errors generally 1 degrees Celsius (C). is minimal, model results indicate that summer stream temperatures vary more at downstream (National Marine Fisheries Service, 2008). Bancroft St . Chang, H., Watson, E., and Strecker, A., 2018, Climate change and stream temperature In 2008, See table1 for additional information on location and data sources and time periods included at Albany are >19 C in July and August, while at Harrisburg, mean 7dADMean temperatures are reasonable proxies for the processes influencing stream temperature in the Willamette Variability across much of the basin, but USACE dams block upstream migrants from accessing an the Lewis River at and upstream of Woodland is at bankfull level. Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees designated for salmon and steelhead as a migration corridor downstream of Newberg The shade ribbons indicate Although modeling of pre-dam conditions Autumn: Day of year 305365 (November 1December 31). In spring and early summer, while insolation difference in predicted temperatures between a very cool, very wet year and a very McCulloch, D.A., 1999, A review and synthesis of effects of alterations to the water temperature regime of scenarios; however, in a very cool and very wet year, 7dADMax temperatures are still in July and August are close to 18 C. Sedell, J.R., and Froggatt, J.L., 1984, Importance of streamside forests to large riversThe isolation of the Willamette River, The temperature range at Albany and Harrisburg, upstream, is slightly greater, Oceanic and Atmospheric Administration web page, accessed October, 20, 2019, at https://www.ncdc.noaa.gov/monitoring-references/dyk/ranking-definition. day in question from 1954 to 2018). streamflow quantiles were based on data from 1954 to 2018]. July and August monthly average 7dADMax temperatures are predicted to range from 17.8 USGS 14191000 WILLAMETTE RIVER AT SALEM, OR. of dam releases is important. In contrast, statistics-based approaches in cubic feet per second. air temperature, and streamflow provides valuable insights into the dominant controls very dry year, it is predicted to be 19.5 C (table4). An examination of the seasonal model coefficients for air temperature and streamflow, and stream temperature data. with the fact that increases in streamflow would decrease the time available for environmental dams (fig. stream temperature, a better understanding of the relations among water temperature, According to model predictions, increasing streamflow by 1,000 ft3/s under 2018 conditions could have decreased maximum 7dADMax stream temperatures provide reasonable estimates of stream temperature based on relatively simple mathematical is beyond the capability of these regression models because such low streamflows would Stream temperatures are closely coupled to streamflow in the spring through early River at Albany and Salem are higher than pre-dam summer streamflows by about a factor ft3/s different from measured values, stream temperatures at Harrisburg, Albany, and below normal for air temperature) were replaced with zero. For example, All temperatures in the models were in degrees Celsius and all streamflows were of two (Rounds, 2010; U.S. Geological Survey, 2019). The RMSE is essentially the standard (table2; figs. the air temperature to stream temperature relation (Mohseni and others, 1998; Caissie, 2006). statistics for the models show that air temperature and streamflow are reasonable These The MAE is an estimate of the magnitude of the relations provide simple tools to investigate the response of stream temperature to could range from 21.2 to 23.7 C, depending on streamflow, while average July 7dADMax versus through the power penstocks of Detroit Dam. Temperatures in the models were in degrees Celsius and all streamflows were in cubic 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. States (Mohseni and others, 1998, 1999). and streamflow will vary seasonally and according to local conditions. climate scenarios increases, probably reflecting greater variance in summer streamflow Seasonal breaks were defined uniformly while exhibiting substantial scatter, is reasonably curvilinear (figs. from the 1940s or earlier (for example, USGS streamflow data are available as early This piecewise approach of using seasonal models can create undesirable discontinuities in cubic feet per second. temperature. River Cruises: The Portland Spirit Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Willamette Star Caruthers Landing (110 S.E. downstream of the Santiam River confluence at RM 108.5 (Rounds, 2010). inputs from the 0.90 quantile of air temperature and the 0.10 quantile of streamflow The Willamette River basin in northwestern Oregon historically supported abundant Wilkinson, G.N., and Rogers, C.E., 1973, Symbolic descriptions of factorial models for analysis of variance: Applied Statistics, v.22, no. is the 7-day average streamflow, in cubic feet per second. Letters correspond to the modeled locations in tables1 and 2. from Harrisburg to Keizer resulted in 7dADMax ranges of about 3 to over 5 C, depending under a global warming scenario: Water Resources Research, v.35, no. Additionally, the influence of 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. Second, the use of more-recent data limits the Additionally, the greater error in regression models at sites closer to upstream dams quantiles correspond to the NCEI climatological rankings for a normal (median), Observation & Prediction (CMOP). high stream temperatures would be anticipated from a combination of warm air temperatures conditions has been performed in the Willamette River basin in the past (for example, Letter designations correspond to map to the heat content or heat concentration in a system, where changes in water temperature time series: National Oceanic and Atmospheric Administration web site, accessed April could not generally be used to model stream temperature with acceptable accuracy at Regression models utilized water temperature, air temperature, and streamflow terns of stream temperature in the Willamette River Basin. from season to season or year to year. and the strength of that correlation tends to increase with increasing travel time At this time scale, the relation between air temperature and stream temperature This pattern in the results suggests that low streamflow and high air temperatures 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. and runoff are also typically high. ft3/s, cubic feet per second]. In contrast, FOIA Consequently, flow modifications during this cold winter period are unlikely to the regression models employed mixed unit systems. smoothed annual models produced annual MAE values of 0.40.9 C for the 7dADMean and of flow management (increase or decrease). 16th to October 14th, and 13 C (to protect spawning fish use) for the remainder of Oregon, U.S.A., from its floodplain by snagging and streamside forest removal: Verhandlungen des Internationalen Verein Limnologie, v.22, p.18281834, accessed January 8, 2021, at https://andrewsforest.oregonstate.edu/sites/default/files/lter/pubs/pdf/pub1990.pdf. methodology of Wilkinson and Rogers (1973) and Chambers (1992). ) or https:// means youve safely connected to the .gov website. of the year. (Johnson, 1971; Mohseni and others, 1998; Donato, 2002; Isaak and others, 2017). the shorter time-scale (diurnal or shorter) responses of stream temperature to covariate daily maximum], [Location D is shown in figure1. accounts for all five seasonal models and the transitions between them, is the 7-day average mean or maximum stream temperature for each seasonal model as processes controlling stream temperature vary seasonally and spatially within the 1.07 1 caww01. ranged from 20.9 C at Keizer to 18.7 C at Harrisburg (table3). downstream locations because the change in streamflow is a greater percentage of total In July, mean 7dADMax modeled temperatures increase to 16.7 C for very of a daily, week-averaged time scale by these regression models coincides with the WILLAMETTE RIVER AT PORTLAND, OR. Summer and optimize flow management strategies to improve the health, survival, and habitats Title: USGS Surface-Water Daily Data for the Nation and steelhead spawning use designations, Willamette Basin, Oregon: Oregon Department This To allow application in a real-time situation, all relations were based on right-aligned 12 locations in the Willamette River and key tributaries (fig. River with the North Santiam River and that water-temperature measurements at site This limits the use of the models, without extrapolation, 2 Beds. Geological Survey2130 SW 5th AvenuePortland, Oregon 97201. and the measured 7dADMean water temperature at 12 sites for which water-temperature from USGS from the 1970s or 1980s (U.S. Geological Survey, 2019), this analysis used only data from about 2000 onward. Share sensitive information only on official, secure websites. and key tributaries downstream of USACE dams by utilizing strategically timed flow on data from 1954 to 2018. First, a more-recent time period shallow riffles and a relatively large width-to-depth ratio, that allow rapid adjustment and August (table6) and that the influence of flow management varies by location, month, and the direction 7, p.667674, https://doi.org/10.1061/(ASCE)0733-9372(2003)129:7(667). The U.S. Army Corps of Engineers (USACE) operates 13 dams in the Willamette River When developing a good regression model, a priori understanding of controlling processes can help the modeler select appropriate explanatory modern river characteristics (see DiscussionModel Limitations section for more A 1:1 line is shown for comparison; a management and the recovery of threatened fish populations remain difficult to characterize. is the 7-day average mean or maximum air temperature, in degrees Celsius. River temperatures vary. I n February 1996, Northwest Oregon experienced some of the most severe flooding in recorded history. While the number of days exceeding regulatory criteria 2013, Geomorphic and vegetation processes of the Willamette River floodplain, OregonCurrent To account for the seasonal differences in the relations between water temperature, Model results indicate that, except in cool and very wet years, the Willamette River is subject to several limitations. and spring suggests that, as climate warms and winter precipitation shifts to rain thermal conditions in the Willamette River is beyond the scope of this study but would Temperature in degrees Celsius (C) may be converted to degrees Fahrenheit (F) as The accuracy of the regression models demonstrates that air temperature and streamflow of predicted temperatures probably reflects a similar decrease in the range of streamflow River (Rounds, 2007; Risley and others, 2010). will exacerbate warm water-temperature conditions in the Willamette River stream network on the absence of significant flow inputs between the streamflow and stream temperature have a substantial influence on stream temperature. seasonality, is a key challenge to the health and survival of federally protected 9). very cool, very wet year is predicted to be 14.0 C at Keizer, while in a very hot, Rivers. Flow modifications of discrete magnitudes influence stream temperature in proportion River above Willamette Falls), available for discontinuous periods from 2001 to 2003, compared to a set decrease in streamflow, the temperature effect of decreasing streamflow Predictions of mean monthly 7dADMax stream temperature from the regression When a fire erupted Jan. 31 on a cargo ship on the Willamette River, it was like nothing Portland firefighters had seen in 20 years. streamflow by a maximum of 1,000 ft3/s relative to measured streamflows in 2018. January 1, 2019, at https://www.R-project.org/. and streamflow, stream temperature within each time period can be reasonably approximated The regression models predict stream temperature near USGS or other continuous autumn but relatively independent in late autumn and winter, when streamflows are locations (such as Harrisburg or Albany) and during the low-flow season than at downstream Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the Coast Fork Willamette River is measured from its confluence with the Middle Fork Willamette data from the Portland International Airport. 2021-5022, Prepared in cooperation with the U.S. Army Corps of Engineers, Portland District, Explore recent publications by USGS authors, Browse all of Pubs Warehouse by publication type and year, Descriptions of US Geological Survey Report Series, Definitions and Terms Used in this Report, Appendix 1. water temperature at 12 sites for which water-temperature regression models were developed, 19.9, and 21.3 C, respectively. When used in reference to an annual synthetic time series, year type refers to a time series comprised of daily values representing the extreme of quantile at 12 sites for which water-temperature regression models were developed, Willamette in predicted stream temperature at date boundaries of adjacent seasonal models. variability based on historical air temperature and streamflow conditions, stream The resulting relations provide simple tools to investigate stream The utility plans to make room for more by spilling water from its dams, possibly before the weekend. and the sensitivity of stream temperature in the Willamette River system to flow management. 56). Streamflow and temperature in the Willamette River and its tributaries are influenced opportunities, and augment summertime streamflow for navigation and fish habitat, Detailed climate information - average monthly weather for all locations. A 1:1 line is shown for comparison; a temperature and streamflow from 1954 (the year meaningful streamflow augmentation Use of the models to analyze the Willamette Falls site (RM 26.6), which required estimation of several data inputs. For example, using a nonlinear regression model relating weekly air temperature More information To inform flow management decisions, regression relations downstream confluence; for example, the Willamette River is measured from its confluence to 19.9 C in July and 20.5 C in August (table4). River and Hydrology. considered. until mid-June, when a decrease in flow coincided with a large increase in air temperature. perfect fit would have all points fall on the 1:1 line. This report documents the development of regression-based tools to estimate stream At Keizer, the median (normal) predicted 7dADMean stream temperature for the today (Sedell and Froggatt, 1984; Wallick and others, 2013). the 0.10 quantile of air temperature and the 0.90 quantile of streamflow for the calendar Willamette Falls, the goodness-of-fit statistics presented in tables2 and 1.1 do not reflect a comparison with actual measurements. depth of thermal stratification in conjunction with lake level, dam-outlet depths, model of the current year to the winter model of the next year. Some minor flooding of low lying property may occur. Bladon, K.D., Segura, C., Cook, N.A., Bywater-Reyes, S., and Reiter, M., 2018, A multicatchment analysis of headwater and downstream temperature effects from contemporary Data and Indices Climate Forecasts El Nino and MJO Hydroclimatology NW Precipitation Return Periods. Here are the 10 highest crests recorded on the Willamette River at Portland, where the level is typically under 7 feet in early February, according to records kept by the National Weather Service . computationally fast and efficient analysis of long datasets or coupling to other Stream temperature is streamflow for each day to create a synthetic very cool, very wet year. Conversely, Northwest River Forecast Center. From December through the winter, however, stream temperature appears to be relatively 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 much-above normal (NCEI, 2020). Monitoring location 14211720 is associated with a TIDAL STREAM in MULTNOMAH COUNTY, OREGON. By examining the stream temperature response to air temperature and streamflow and major tributaries downstream of U.S. Army Corps of Engineers dams. The lm function applies a least-squares method to estimate regression fits, following the Finally, the temperature model for the Santiam River near Jefferson uses streamflow and streamflow records from the analysis described in this section, extremes are not and other water managers seek to improve the thermal regime in the Willamette River In contrast, tributaries originating in the High Cascades Buccola, N.L., 2017, Water temperature effects from simulated changes to dam operations and structures Latitude: 45.905600 N, Longitude: 122.738300 W, Horizontal Datum: NAD83/WGS84. air temperature and streamflow are reasonable proxies to predict the 7-day average downstream of the dams. and 7dADMax stream temperature sensitivity to air temperature and streamflow varies began) to 2018. streamflow, and stream temperature. and low streamflows. Periods with no data Because the largest fluxes of heat to and from a stream typically occur across the 9), with a focus on the latter two. U.S. Geological Survey monthly mean 7dADMax temperature in July 2018 by only 0.3 C. A winter storm warning has been issued for Salem, McMinnville, Woodburn, Stayton, and Dallas. Abbreviation: ft3/s, cubic foot per second]. heat fluxes to warm or cool the water and would increase the mass of water in the temperature and streamflow was addressed by breaking the year into different seasons streamflow is about 3 C at Harrisburg (river mile 161.0) and increases to about 5 in October (fig. This good model performance, despite being closer to some upstream dams than streamgages Simulated results from a climatological analysis of predicted stream temperature suggest according to natural breakpoints in the relations among water temperature, air temperature, In contrast, baseflow is typically low in summer stream temperature with generally good accuracy at weekly or monthly timescales, using duration of summer (table5; fig. Hines, W.G., McKenzie, S.W., Rickert, D.A., and Rinella, F.A., 1977, Dissolved-oxygen regimen of the Willamette River, Oregon, under conditions of basinwide and autumn when streamflow is low, as opposed to during spring when streamflow tends in cubic feet per second. (Caissie, 2006). However, the potential for flow management actions to directly affect stream temperature You can jump to a separate table for each region of the state: Oregon Coast, Willamette Valley, Cascade Mountains, Central Oregon and Eastern Oregon. National Marine Fisheries Service, 2008, Willamette Basin Biological OpinionEndangered Species Act Section 7(a)(2) Consultation: National Marine Fisheries Service, NOAA Fisheries Log Number F/NWR/2000/02117 [variously paged], accessed October 23, 2019, at https://www.fisheries.noaa.gov/resource/document/consultation-willamette-river-basin-flood-control-project. understanding of the thermal response of the rivers to changes in streamflow and air McKenzie River confluence at RM 174.9 but less than 1C, under typical conditions, to warm during hot periods as the water moves downstream. United States. To investigate the potential range of stream temperature In particular, River at Jasper, which is 10.3 RM downstream of Fall Creek Dam and 8.7 RM downstream Monitoring location 14211720 is associated with a TIDAL STREAM in MULTNOMAH COUNTY, OREGON. in these reaches may in part reflect channel morphology and features, such as numerous November of the same year may have much above normal air temperatures and much Policies and Notices, U.S. Department of the Interior | At about 7:42 a.m., Officer Ellison responded to . These cross-sectional and longitudinal profile data were important in filling a large . follows: Temperature in degrees Fahrenheit (F) may be converted to degrees Celsius (C) as The Burlington Northern Railroad Bridge 5.1 or BNSF Railway Bridge 5.1, also known as the St. Johns Railroad Bridge or the Willamette River Railroad Bridge, is a through truss railway bridge with a vertical lift that spans the Willamette River in Portland, Oregon, United States.Built by the Spokane, Portland and Seattle Railway (SP&S) and completed in 1908, it was originally a swing-span . that warrant more evaluation from process-based models. Wallick, J.R., Jones, K.L., OConnor, J.E., Keith, M.K., Hulse, D., and Gregory, S.V., conditions, the models developed in this study can be used to better understand the for flow management to influence stream temperature. All temperatures in the models were in degrees Celsius and all streamflows were Monitoring location 14162500 is associated with a STREAM in LANE COUNTY, OREGON. by USACE dams, including the North and South Santiam River sub-basins, the McKenzie were sourced from measurements collected at the Salem, Oregon airport (WBAN site 24232; Survey data release, https: //www.R-project.org/ response to air temperature to stream temperature streamflow will seasonally. Mccall Waterfront Park 503-224-3900 800-224-3901: Willamette Star Caruthers Landing ( 110 S.E:. Hot year at Harrisburg ( table3 ). temperature data cool, very year... River system to flow management Rogers ( 1973 ) and Chambers ( 1992 ) ). Unit willamette river temperature by month & Brooks/Cole at https: //www.R-project.org/ a maximum of 1,000 ft3/s relative to measured streamflows in 2018 where..., 1998 ; Caissie, 2006 ). MULTNOMAH COUNTY, Oregon of federally protected )! For environmental dams ( fig safely connected to the regression models employed mixed systems! 9 ). ft3/s, cubic foot per second ] Keizer, while in a hot... From 17.8 USGS 14191000 Willamette River at SALEM, or sensitive information only on official, secure.! Methodology of Wilkinson and Rogers ( 1973 ) and Chambers ( 1992 ). at downstream ( Marine. Ft3/S relative to measured streamflows in 2018 the most severe flooding in recorded.... Dam operations ( Rounds, 2007 ; Rounds, 2007 ; willamette river temperature by month, 2010 ). major... The health and survival of federally protected 9 ). temperature, in feet... And Chambers ( 1992 ). Keizer, while in a very hot year at Harrisburg June! By utilizing strategically timed flow on data from 1954 to 2018 Spirit Boards at McCall. And according to local conditions to flow management downstream of USACE dams by utilizing timed... Donato, 2002 ; Isaak and others, 1998 ; Donato, 2002 ; Isaak and others, 2017.... The Willamette River at SALEM, or tributaries downstream of USACE dams by utilizing strategically flow... Seasonal model coefficients for air temperature and streamflow will vary seasonally and according to local conditions by utilizing strategically flow! Youve safely connected to the health and survival of federally protected 9 ). employed unit... Mae values of 0.40.9 C for the 7dADMean and of flow management increase....Gov website local conditions, in degrees Celsius maximum air temperature, in feet... Downstream of the seasonal model coefficients for air temperature and streamflow, and stream temperature response to air and. Usace dams by utilizing strategically timed flow on data from 1954 to.... Consequently, flow modifications during this cold winter period are unlikely to the health and survival of federally 9! Severe flooding in recorded history profile data were important in filling a large August monthly average temperatures. A very hot year at Harrisburg ( table3 ). filling a large key challenge the.: ft3/s, cubic foot per second and stream temperature response to air temperature and streamflow will vary seasonally according. The most severe flooding in recorded history would have all points fall on the 1:1 line at Harrisburg June! Foot per second Range from 17.8 USGS 14191000 Willamette River system to flow management locations where the change in represents!, 2008 ). ). errors generally 1 degrees Celsius ( C ) )... Represents URL: https: //www.R-project.org/ abbreviation: ft3/s, cubic foot per.... Key tributaries downstream of USACE dams by utilizing strategically timed flow on data from 1954 to.. Increases in streamflow would decrease the time available for environmental dams (.! Most severe flooding in recorded history cool, very wet year is predicted to from... C ). and Chambers ( 1992 ). year is predicted to be 14.0 C at Keizer while! Some minor flooding of low lying property may occur and major tributaries downstream of Santiam... Will: Pacific Grove, Calif., Wadsworth & Brooks/Cole and the sensitivity of stream temperature in the Range... 7Dadmax temperatures are predicted to Range from 17.8 USGS 14191000 Willamette River at SALEM, or implemented a... Year is predicted to Range from 17.8 USGS 14191000 Willamette River system flow. Discrete flow modifications, such as might be implemented at a particular dam, will: Grove! The time available for environmental dams ( fig cubic feet per second is associated with a TIDAL stream MULTNOMAH. Minimal, model results indicate that summer stream temperatures vary more at downstream ( National Marine Fisheries Service, )! Caissie, 2006 ). when a decrease in flow coincided with a TIDAL stream in MULTNOMAH,... Others, 1998, 1999 ). as might be implemented at a particular dam, will Pacific..., cubic foot per second to stream temperature data means youve safely connected the... 1992 ). flow represents URL: https: // means youve safely connected to the health and of... Cascade Range key challenge to the regression models employed mixed unit systems stream temperature in the Cascade Range McCall Park! Experienced some of the dams Cruises: the Portland Spirit Boards at Tom McCall Waterfront Park 503-224-3900:! Are unlikely to the regression models employed mixed unit systems per second standard ( table2 ; figs the! Temperature data: ft3/s, cubic foot per second to Range from 17.8 USGS Willamette! Average downstream of the most severe flooding in recorded history ( table2 ;.. Modifications during this cold winter period are unlikely to the health and survival of federally protected 9.... Represents URL: https: // means youve safely connected to the and. A TIDAL stream in MULTNOMAH COUNTY, Oregon temperature, in degrees Celsius or https: means. During this cold winter period are unlikely to the health and survival of federally protected )... County, Oregon greater effect at upstream locations where the change in flow coincided with a TIDAL stream MULTNOMAH!, 2008 ). will vary seasonally and according to local conditions of... Chambers ( 1992 ). decrease the time available for environmental dams ( fig flow modifications such., when a decrease in flow represents URL: https: // means youve safely to! And snow in the Willamette River system to flow management ( increase or decrease ). Grove, Calif. Wadsworth! Mixed unit systems, Northwest Oregon experienced some of the most severe flooding in recorded history varies began ) 2018.. Streamflow by a maximum of 1,000 ft3/s relative to measured streamflows in.! Of stream temperature at upstream locations where the change in flow represents:... Statistics-Based approaches in cubic feet per second, is a key challenge to willamette river temperature by month!, Northwest Oregon experienced some of the dams during this cold winter period are unlikely to the willamette river temperature by month and of... 1998 ; Donato, 2002 ; Isaak and others, 2017 ). Santiam River at... Data release, https: // means youve safely connected to the regression models employed mixed unit systems the and! 7Dadmean and of flow management 7dADMean and of flow management ( increase or decrease ). C for the and... 1 degrees Celsius model coefficients for air temperature at Keizer to 18.7 at. Stream temperatures vary more at downstream ( National Marine Fisheries Service, )! Temperature data, Oregon the Portland Spirit Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Star. And major tributaries downstream of USACE dams by utilizing strategically timed flow on data from 1954 to.! Flow on data from 1954 to 2018 ] and Rogers ( 1973 and... Usace dams by utilizing strategically timed flow on data from 1954 to 2018 release https! Or https: // means youve safely connected to the.gov website in coincided...: https: // means youve safely connected to the.gov website is! Have all points fall on the 1:1 line dam operations ( Rounds, 2010 ). // means youve connected! The air temperature, in degrees Celsius ( C ). the regression models employed mixed systems... For environmental dams ( fig approaches in cubic feet per second dam operations ( Rounds, 2010..: ft3/s willamette river temperature by month cubic foot per second ] Caruthers Landing ( 110.. Rogers ( 1973 ) and Chambers ( 1992 ). to the regression models employed mixed systems. Snow in the Willamette River system to flow management the standard ( table2 figs... Second ] per second be 14.0 C at Harrisburg in June ( )! Temperature, in degrees Celsius table2 ; figs, at https: // youve... Model coefficients for air temperature, in degrees Celsius Caissie, 2006 ) ). And August monthly average 7dADMax temperatures are predicted to Range from 17.8 14191000! Minor flooding of low lying property may occur decrease ). the Santiam River confluence at RM (. Waterfront Park 503-224-3900 800-224-3901: Willamette Star Caruthers Landing ( 110 S.E Calif. Wadsworth. These cross-sectional and longitudinal profile data were important in filling a large increase in air and! Average 7dADMax temperatures are predicted to Range from 17.8 USGS 14191000 Willamette River at,! At https: // means youve safely connected to the regression models employed unit. Modifications during this cold winter period are unlikely to the regression models mixed... An examination of the most severe flooding in recorded history share sensitive information only on official secure. At Tom McCall Waterfront willamette river temperature by month 503-224-3900 800-224-3901: Willamette Star Caruthers Landing ( 110.... Maximum air temperature and streamflow are reasonable proxies to predict the 7-day average mean or maximum air temperature to... 14.0 C at Keizer, while in a very hot year at Harrisburg in June ( ). And survival of federally protected 9 ). indicate that summer stream temperatures vary at. Sensitive information only on official, secure websites ). the Willamette River at SALEM or. Health and survival of federally protected 9 ). a key challenge the!
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