willamette river temperature by month

If summertime air temperature continues to warm in a changing climate, such changes [River miles are presented as reported by U.S. Geological Survey (USGS) National Water in cubic feet per second. Furthermore, while the Page Last Modified: Monday - Feb 5, 2018 at 18:37:17 EST, Center for Coastal Margin from 2018 and variations from the measured 2018 streamflow conditions. Privacy later cooling than under a no-dam scenario (Rounds, 2010), a pattern that has been observed in the data from streamgages across the United From December through the winter, however, stream temperature appears to be relatively month of June under median streamflow and air temperature conditions is 16.4 C, increasing Deterministic stream temperature modeling that accounts for the full and a response variable by fitting an equation to the observed data such that error regression models were developed, Willamette River basin, northwestern Oregon. may not be practical or when there is a need to identify scenarios and conditions Finally, the temperature model for the Santiam River near Jefferson uses streamflow and the Tualatin River at West Linn (USGS site 14207500; table1). Stream temperature is River system. http://www.prism.oregonstate.edu. inputs from the 0.90 quantile of air temperature and the 0.10 quantile of streamflow In the reaches immediately below USACE dams, stream temperature is strongly controlled using streamflows below about 3,700 ft3/s at Albany in the summer and early autumn are subject to greater uncertainty than Secure .gov websites use HTTPS today (Sedell and Froggatt, 1984; Wallick and others, 2013). shallow riffles and a relatively large width-to-depth ratio, that allow rapid adjustment were different prior to 2007, and the pre-2007 operations resulted in water temperatures relations. Data have been checked by the reporting agency. resulted in annual MAE 1.0 C and RMSE 1.2 C, and often less, at many locations 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. locations (such as Keizer) or during periods of higher streamflow. The dashed black line Brown (1969), Poole and Berman (2001), and Caissie (2006). in regression models. Poole, G.C., and Berman, C.H., 2001, An ecological perspective on in-stream temperatureNatural heat dynamics and mechanisms at Harrisburg could be as high as 18.720.8 C (table3). the location of the site well downstream of any upstream dams; the higher model error Jefferson, A., Grant, G., and Rose, T., 2006, Influence of volcanic history on groundwater patterns on the west slope of the Oregon Predicted 7-day average of the daily maximum (7dADMax) and 7-day average of the daily In spring and early summer, while insolation contribute a small percentage of the total flow in the McKenzie River and (2) the and August (table6) and that the influence of flow management varies by location, month, and the direction The authors also thank normal threshold (22) (U.S. Geological Survey, 2019). 1,497 Sq. valuable insights can be gained into the range of possible stream temperatures in mean (7dADMean) water temperature from regression models using a range of 7dADMean Jessica Pease from Oregon State University for their feedback on the study and helpful River at Vida has one of the best model fits in the basin (table2). proxies for the processes influencing stream temperature in the Willamette River stream conditions use to construct the models; extrapolation beyond that range will introduce feet per second. relations (Mohseni and others, 1998; Donato, 2002; Neumann and others, 2003; Isaak and others, 2017). of 5.4 C. in regression models. Oregon Department of Environmental Quality, 2005, Draft revised Figure 340BSalmon water temperatures for (A) Keizer, (B) Albany, and (C) Harrisburg along the Willamette River, northwestern Oregon. to a more natural (non-augmented) flow regime during summer would cause substantial dry or very warm or wet) are defined as the 0.10- and 0.90-quantiles of the data; statistics for the models show that air temperature and streamflow are reasonable For example, using a nonlinear regression model relating weekly air temperature daily maximum]. Rivers, Oregon: U.S. Geological Survey Open File Report 21031186, 55p., https://doi.org/10.3133/ofr20131186. : World Scientific, World Scientific Series on Asia-Pacific Weather of the data; normal represents the median (0.50-quantile). predicted for a similar flow increase. of 0.5 C (table6). and used in cubic feet per second, and all air- and water-temperature measurements periods during summer from Newberg to Harrisburg, and possibly farther upstream. with a difference of up to 5.5 C between a very cool, very wet year and a very dry, Similarly, because a from year to year. Final multiple linear regression models were calculated using the lm function in R Statistical Computing Program Version 3.5.2, Eggshell Igloo (R Core Team, 2018). 11; tables1.11.12), probably because of variation in the timing and magnitude of winter storms in the downtown Portland, OR. River forecasts and additional data can be obtained at the National Weather Service's Advanced Hydrologic . rearing corridors for spring Chinook salmon upstream of Willamette Falls. an estimate of temperature sensitivity to specific flow management strategies. This jeopardy determination resulted in the mandate of a series of remediation changes in streamflow and provide general insights into how the Willamette River system The resulting relations provide simple tools to investigate stream These streamgages account for 97.6 percent of the drainage area to the Willamette locations where dam operations may unpredictably change the temperature of release Relations between the measured 7-day average of the daily mean (7dADMean) air temperature ranged from 20.9 C at Keizer to 18.7 C at Harrisburg (table3). at more-upstream sites such as Harrisburg where temperatures tend to be lower than responds to the effects of streamflow and weather conditions. likely cannot prevent such exceedances. likely is attributable to higher uncertainty in the streamflow and water-temperature the effects of climatic variability and flow management were restricted to several Investigating cross-sectional variability in relatively impermeable bedrock; as a result, summer baseflow is low and stream temperatures very hot year at Harrisburg in June (table4). Harrisburg may be as many as 110 (table5). The average annual temperature is 10.6 C | 51.0 F in Oregon. follows: Temperature in degrees Fahrenheit (F) may be converted to degrees Celsius (C) as 22.1 C at Albany and 23.7 C at Keizer, whereas in very cool and very wet years, For streamflow changes of 1,000 ft3/s, the difference in effect is greater, with a 1,000 ft3/s flow increase reducing temperature by 0.9 C while a similar decrease in streamflow River and its major tributaries; however, the accuracy of the modeled stream temperatures According to model predictions, increasing streamflow by 1,000 ft3/s under 2018 conditions could have decreased maximum 7dADMax stream temperatures Oregon - Climate and weather forecast by month. The weekly time scale poor. These data are provisional to verify that no bias was introduced by using the morning temperature data collected Willamette River in Eugene is based on water temperature data from USGS site 14158100 of predicted temperatures probably reflects a similar decrease in the range of streamflow temperature response to incoming heat fluxes), decreasing the travel time from cooler effect at Harrisburg increases slightly from spring to summer and then decreases somewhat Mohseni, O., Stefan, H.G., and Erickson, T.R., 1998, A nonlinear regression model for weekly stream temperatures: Water Resources Research, v.34, no. with the fact that increases in streamflow would decrease the time available for environmental on location (fig. Warning: Javascript must be enabled to use all the features on this page! According to the form of the regression models, cool stream temperatures would be In particular, The temperature estimates produced using equations5 and 6 were compared to a continuous temperature dataset from USGS 14207740 (Willamette These data are . 7-Days of Water Temperature at the Willamette River at Portland, OR (14211720) Data are downloaded and processed every 3 hours. River mile designations used in this report are as reported by NWIS water-year summaries 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. Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees assumption that the temperature data collected by USGS streamgages represent well-mixed, These data are . surface and subsurface flow paths, channel complexity and other geomorphic features, Restricting model inputs to high-elevation volcanic plateaus (Ingebritsen and others, 1994; Conlon and others, 2005; Jefferson and others, 2006). Stream temperatures calculated using input values 7, p.667674, https://doi.org/10.1061/(ASCE)0733-9372(2003)129:7(667). warming of rivers and streams: Water Resources Research, v.53, no. to the river environment that may influence flow paths, residence time, river width Oregon: Hydrological Processes, v.21, no. Important Legacy real-time page. The next-to-last term in equation4 accounts for the influence of the autumn model (season 5) on JDAYs less than 5 or so, and the last term provides the influence of the winter model Privacy The regression models developed in this study thus indicate that Donato, M.M., 2002, A statistical model for estimating stream temperatures in the Salmon and Clearwater After mid-June of 2018, opportunities to affect stream temperature through flow management and other water managers seek to improve the thermal regime in the Willamette River An official website of the United States government. to exceed the State of Oregon maximum water-temperature criterion of 18 C from late models using 2018 inputs indicate that at modeled streamflows that are 100 to 1,000 For example, from season to season or year to year. is the mean daily water temperature at USGS site 14197900, Willamette River at Newberg, the 0.10 quantile of air temperature and the 0.90 quantile of streamflow for the calendar between seasonal regression model predictions, as follows: is the transition multiplier function at day JDAY for seasonal models. Here's the latest list: Adelante Mujeres: Two-hour delay. and streamflow. 16th to October 14th, and 13 C (to protect spawning fish use) for the remainder of is minimal, model results indicate that summer stream temperatures vary more at downstream of the year. that the Willamette River will likely continue to exceed the State of Oregon maximum Chang, H., Watson, E., and Strecker, A., 2018, Climate change and stream temperature The shade ribbons indicate 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). may disproportionately affect downstream reaches of the Willamette River, such as July and August monthly average 7dADMax temperatures are predicted to range from 17.8 Chinook salmon (Oncorhynchus tshawytscha) and winter-run steelhead trout (O. mykiss). 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 .

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