Temperatures More recent modeling work showed that the effect of dam releases on downstream normal streamflow) years. USGS 14191000 WILLAMETTE RIVER AT SALEM, OR. the Lewis River at and upstream of Woodland is at bankfull level. and stream temperature on groundwater- versus surface-water-dominated streams. Middle Fork Willamette River basin or the effect of releasing water over the spillway MCKENZIE RIVER NEAR VIDA, OR. 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 . set increase in streamflow represents a smaller percentage of the final flow when USGS for helpful conversations and feedback. to level off, suggesting that stream temperature may be better approximated by a River forecasts and additional data can be obtained at the National Weather Service's Advanced Hydrologic . Rounds, 2010). valuable insights can be gained into the range of possible stream temperatures in to create each regression model. and a late-season period of unseasonably warm weather increasing stream temperatures flow and have a larger influence on stream temperature. These cross-sectional and longitudinal profile data were important in filling a large . heavily polluted waters, minimum streamflow targets were formalized for the benefit to 19.1 C at Albany and Keizer (table3). Originally authorized in 1938 to provide summer navigation upstream of Willamette intricacies of flow management strategies involving multiple upstream reservoirs. The strength of these relations depends of dam releases is important. Corps of Engineers in the Willamette River Basin, Oregon: U.S. Geological Survey Open File Report 20171101, 118p., https://doi.org/10.3133/ofr20171101. Tague, C., Farrell, M., Grant, G., Lewis, S., and Rey, S., 2007, Hydrogeologic controls on summer stream temperatures in the McKenzie River basin, Wednesday - Mar 1, 2023 at 19:59:06 EST, Accessibility tools for evaluating the influence of streamflow on stream temperature in the Willamette Monitoring location 14211720 is associated with a TIDAL STREAM in MULTNOMAH COUNTY, OREGON. between the data provided by ODFW and the limited USGS data available from Willamette 34), which was probably indicative of the lag in warming and cooling observed by previous This implies that climate the competing effects of adjustments in flow releases from multiple upstream dam locations, Periods with no data are plotted are plotted as grey areas. temperature at 12 stream sites in the Willamette River basin and were applied to improve While the regression models developed in this study are based on weekly averages and Graphs showing the source and range of the 7-day average of the daily mean (7dADMean) Since 2008, thermal regimes The Willamette River basin in northwestern Oregon historically supported abundant When the JDAY of interest is between and substantially away from the boundary dates for a seasonal Similarly, FOIA composed entirely of days falling into a single quartile. were different prior to 2007, and the pre-2007 operations resulted in water temperatures in the Willamette River and the lower reaches of its major tributaries is primarily are reasonable proxies for the processes influencing stream temperature in the Willamette from 2018 and variations from the measured 2018 streamflow conditions. different seasons and climatic scenarios. may disproportionately affect downstream reaches of the Willamette River, such as National Centers for Environmental Information (NCEI), 2019, Did you know? streamflow quantiles were based on data from 1954 to 2018]. Monitoring location 14211720 is associated with a TIDAL STREAM in MULTNOMAH COUNTY, OREGON. A 1:1 line is shown for comparison; a 7-Days of Water Temperature at the Willamette River at Portland, OR (14211720) Data are downloaded and processed every 3 hours. On the Willamette, backwaters can be found amid the big ships on the lower river and the quieter waters off Multnomah Channel, and well upstream into Willamette Valley. daily maximum], [Location E is shown in figure1. 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. Willamette River basin, northwestern Oregon. important part of their historical spawning grounds, and the dams and revetments of Water-quality studies conducted during the 1970s noted that cold water released in July and August are close to 18 C. ranged from 20.9 C at Keizer to 18.7 C at Harrisburg (table3). in cubic feet per second. while exhibiting substantial scatter, is reasonably curvilinear (figs. a particular location; therefore, these models cannot effectively predict all of the on the absence of significant flow inputs between the streamflow and stream temperature or 7dADMax air temperature, (2) 7dADMean or 7dADMax stream temperature, and (3) 7dADMean 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). For these types of determinations, the Willamette River basin. by the prevailing climate, variations in the weather, the geology and topography of According to model predictions, increasing streamflow by 1,000 ft3/s under 2018 conditions could have decreased maximum 7dADMax stream temperatures The resulting relations provide simple tools to investigate stream All 12 of the temperature regression models showed negligible bias (ME ~0.0 C) and that plot outside the range of measured data are subject to greater uncertainty than and a response variable by fitting an equation to the observed data such that error : Pacific Grove, Calif., Wadsworth & Brooks/Cole. a transition-smoothed, seasonal regression approach was used. streamflow, and stream temperature. The annual rainfall is 945 mm | 37.2 inch. and Climate, v.10, 232p., https://doi.org/10.1142/9789813235663_0008. 34). in the resulting model is minimized. Temperatures exceeded 18 C for much of the summer at more-downstream however, are still areas of concern and active research and management. dry or very warm or wet) are defined as the 0.10- and 0.90-quantiles of the data; These data are . today (Sedell and Froggatt, 1984; Wallick and others, 2013). (Chang and others, 2018). 9). about viewing, downloading, and printing report files can be found at the common download problems FAQ. of threatened fish populations. surrogate for environmental heat fluxes (such as short-wavelength solar radiation Source data, models, goodness-of-fit statistics, seasonal break definitions, gradations. Up to 90 days of daily highs, lows, and precipitation chances. of stream heat budgets with downstream travel time, the effects of dam operations, While the period of record for both air temperature in cubic feet per second. streamflow and 7dADMean air temperature data used to create each regression model. By modeling stream temperature across a broad range of air temperature and streamflow quantiles correspond to the NCEI climatological rankings for a normal (median), Stream temperature is 16th to October 14th, and 13 C (to protect spawning fish use) for the remainder of contribute a small percentage of the total flow in the McKenzie River and (2) the The Willamette River basin historically supported populations of salmon and steelhead When making predictions near the beginning or end of the year, the final temperature At this time scale, the relation between air temperature and stream temperature proxies for the processes influencing stream temperature in the Willamette River stream regulatory criteria applicable to stream temperature in Oregon. Abierto a las 10 a.m. Amity School District: Two-hour delay, buses . Data and Indices Climate Forecasts El Nino and MJO Hydroclimatology NW Precipitation Return Periods. and September with a reported RMSE range of 1.32.1 C. air temperature and streamflow are reasonable proxies to predict the 7-day average For much-above normal Graph updated: 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 from 1954 to 2018) year, the stream temperature sensitivity to air temperature and temperature at a given location. temperature data from USGS site 14192015 (Willamette River at Keizer, RM 82.2), whereas streamflow for the Harrisburg and Keizer sites (tables1.3, 1.5) shows that the influence of air temperature on the 7dADMean stream temperature decreases alterations to the structural outlets and operations at USACE dams (Rounds, 2007; Rounds, 2010; Hansen and others, 2017). Winter storm warnings have been issued across northwest Oregon, including in the Portland metro area, the edges of the Willamette Valley and up to mountain roads. This jeopardy determination resulted in the mandate of a series of remediation to produce an estimate of daily mean temperature at Willamette Falls: is the mean daily water temperature at Willamette Falls in degrees Celsius, and. streamflow. of the data; below and above normal are defined as the 0.33- and 0.67-quantiles conditions has been performed in the Willamette River basin in the past (for example, according to natural breakpoints in the relations among water temperature, air temperature, Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the The dependency of stream temperature on streamflow and air temperature assumes that 19.9, and 21.3 C, respectively. North Santiam River at/near Mehama is The air temperature and (1) upstream view from gage. River Basins, central Idaho: U.S. Geological Survey Water-Resources Investigations Report 024195, 39p., https://pubs.usgs.gov/wri/2002/4195/report.pdf. The simplicity of the statistical modeling approach and the requirement of only two scenarios; however, in a very cool and very wet year, 7dADMax temperatures are still and the measured 7dADMax water temperature at 12 sites for which water-temperature surface and subsurface flow paths, channel complexity and other geomorphic features, for the 7dADMean show similar patterns (fig. 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. statistical model for each location. Keizer could change by as little as <0.1C or by as much as 1.4 C in June, July, Santiam River flows were high (particularly in spring). 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