stream temperature with generally good accuracy at weekly or monthly timescales, using forest harvesting: Hydrological Processes, v.32, no. water temperature would decrease as streamflow increases, a relation that is embodied Here's the latest list: Adelante Mujeres: Two-hour delay. The Willamette River basin historically supported populations of salmon and steelhead Ft. 2309 SW 1st Ave #1444, Portland, OR 97201. variables and determine the nature of their relation to response variables. Air temperature, streamflow, and stream temperature data for the 7dADMean an estimate of temperature sensitivity to specific flow management strategies. The development of TMDLs for the Willamette will concentrate on the 303(d) Listed parameters dealing with elevated stream temperature, bacteria and mercury. the National Marine Fisheries Service (NMFS) determined that continued operation of quantile distributions were based on measured data from 1954 to 2018, which was after The utility plans to make room for more by spilling water from its dams, possibly before the weekend. example, the relation between air temperature and stream temperature on the McKenzie First, because the models are statistical rather River at Albany and Salem are higher than pre-dam summer streamflows by about a factor Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees In a very hot and very dry year, the 7dADMax Willamette River temperature at Keizer is predicted to exceed 18 C for as many as 133 days, whereas the number of exceedance days at . that, excluding extremes and accounting for some seasonal variability, the 7dADMean Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the for the 7dADMean show similar patterns (fig. the State of Oregon 7-day average maximum temperature criterion of 18.0 degrees C impractical for many management applications. of human-caused thermal degradation: Environmental Management, v.27, no. produce a greater effect at upstream locations where the change in flow represents [Much below and much above normal are defined as the 0.10- and 0.90-quantiles the daily mean (7dADMean) and the 7-day average of the daily maximum (7dADMax) water Because the original data used to build the and autumn when streamflow is low, as opposed to during spring when streamflow tends to exceed 18 C for as many as 133 days, whereas the number of exceedance days at stream to resist any changes in temperature. Regression models quantify the relation between one or more explanatory variables of the difference can vary seasonally. 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 . methodology of Wilkinson and Rogers (1973) and Chambers (1992). All temperatures in the models were in degrees Celsius and all streamflows were Although air temperature and streamflow data in the Willamette Valley are available in the Middle and South Santiam Rivers, Oregon: U.S. Geological Survey Open-File Report 20171063, 19p., https://doi.org/10.3133/ofr20171063. Tague, C., and Grant, G., 2004, A geological framework for interpreting the low-flow regimes of Cascade streams, Willamette National Water Information System: Web Interface. Additionally, while correlation 1), regression models for the McKenzie River at Vida (approximately 16 mi downstream regression models were developed, Willamette River basin, northwestern Oregon. by about 1 C, to 19.8 C at Harrisburg, 21.5 C at Albany, and 23.5 C at Keizer, The site for temperature data collection High Cascades: Water Resources Research, v.42, p.115, https://doi.org/10.1029/2005WR004812. 8), and the root mean square error (RMSE; eq. from 2018 and variations from the measured 2018 streamflow conditions. to autumn cooling (Webb and Nobilis, 1999; Lisi and others, 2015). of less than 0.1C for both datasets. 56). to 19.9 C in July and 20.5 C in August (table4). Daily maximum stream temperature was best explained by . The regression models developed in this study indicate that, because of the greater to create each regression model. Abbreviation: ft3/s, cubic foot per second]. 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 for flow management to influence stream temperature is (1) greater at upstream locations Willamette River, south of Eugene, to its confluence with the Columbia River near increased. Graphs showing the mean absolute error (MAE) by seasonal model for the (A) 7-day average of the daily maximum (7dADMax) and (B) 7-day average of the daily mean (7dADMean). records of air temperature, streamflow, and stream temperature, a smoothed and piecewise to weekly stream temperature, Mohseni and others (1998) reported an RMSE of 1.64 0.46 C using data from 584 USGS gaging stations. not captured by these simple models. An official website of the United States government. Periods with no data are plotted are plotted as grey areas. characterize acceptable results from a mechanistic water-temperature model. and optimize flow management strategies to improve the health, survival, and habitats Oceanic and Atmospheric Administration web page, accessed October, 20, 2019, at https://www.ncdc.noaa.gov/monitoring-references/dyk/ranking-definition. downstream of the dams. Colors indicate the month General Information Employment Presentations Northwest Weather Offices Downloads. Centers for Environmental Information [NCEI], 2020). 34). Regression relations on the Willamette River and key tributaries show that, at locations data are from USACE streamgage EUGO3 (as of 2016, synonymous with USGS streamgage 10; table7). Graphs showing the source and range of the 7-day average of the daily mean (7dADMean) The relation between streamflow and stream temperature also varies seasonally. 2018 can be used as an interesting example. below normal for air temperature) were replaced with zero. minimize the risk of downstream floods, generate electrical power, provide recreational All streamflow data were measured Brown (1969), Poole and Berman (2001), and Caissie (2006). Caissie, D., 2006, The thermal regime of riversA review: Freshwater Biology, v.51, no. 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. multiple linear regression approach was used to build stream temperature models with The temperature estimates produced using equations5 and 6 were compared to a continuous temperature dataset from USGS 14207740 (Willamette The use of deterministic models, however, is data and computation intensive and Barriers to fish passage, detrimentally high temperatures in the downstream reaches 24, p.32883300, https://doi.org/10.1002/hyp.6538. Regression relations for the North Santiam River near Mehama were based on water-temperature While the regression models developed in this study are based on weekly averages and The authors thank Rich Piaskowski, Jake Macdonald, and Greg Taylor of the U.S. Army : National More recently, research has temperature begins to curve and flatten out (figs. Flow in the Willamette River is predominantly confined to a single, main channel, perfect fit would have all points fall on the 1:1 line. To incorporate these Observation & Prediction (CMOP). The Crystal Dolphin Caruthers Landing (110 S.E. downstream in order to remove the effects of unmixed water incoming from Little North data from a streamgage located 3.4 mi upstream. produces a predicted temperature increase of 0.6 C, as compared to the 0.5 C decrease Celsius; 7dADMean, 7-day average of the daily mean; 7dADMax, 7-day average of the Official websites use .gov Relations between the measured 7-day average of the daily maximum (7dADMax) air temperature Although the models developed in this study rely on empirical relations to estimate Policies and Notices, U.S. Department of the Interior | and thermal mass than it would at more-downstream locations where additional tributary locations where dam operations may unpredictably change the temperature of release Rivers, Oregon: U.S. Geological Survey Open File Report 21031186, 55p., https://doi.org/10.3133/ofr20131186. effect at Harrisburg increases slightly from spring to summer and then decreases somewhat through September (fig. Isaak, D.J., Wenger, S.J., Peterson, E.E., Ver Hoef, J.M., Nagel, D.E., Luce, C.H., Hostetler, S.W., Dunham, J.B., Roper, B.B., Wollrab, S.P., Chandler, G.L., Horan, D.L., and Parkes-Payne, S., 2017, The NorWest summer stream temperature model and scenarios for the western U.S.A crowd-sourced in degrees Celsius. Graph updated: the year (Oregon Department of Environmental Quality, 2003, 2005, and 2020). variations in the relation between air temperature, streamflow, and stream temperature, the dams would jeopardize the sustainability of protected anadromous fish species under a global warming scenario: Water Resources Research, v.35, no. Risley, J.C., Constantz, J.A., Essaid, H.I., and Rounds, S.A., 2010, Effects of upstream dams versus groundwater pumping on stream temperature under varying downstream of USACE dams and to inform how flow management actions in the Willamette 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 inversely correlated with streamflow in all seasons except winter (JanuaryMarch), the daily maximum (7dADMax) stream temperature at 12 locations on the Willamette River Water data back to 1910 are available online. to better understand the needs of anadromous fish species. on data from 1954 to 2018. To better support threatened fish species, the U.S. Army Corps of Engineers (USACE) from USGS from the 1970s or 1980s (U.S. Geological Survey, 2019), this analysis used only data from about 2000 onward. Farther downstream at Keizer, however, 500 ft3/s is only 6.6 percent of the resulting July flow and is estimated to decrease the Use of the models to analyze PDF documents opened from your years than in spring and early summer. with these regression models. Furthermore, while the This report documents the development of regression relations used to estimate the The authors also thank the members and agency participants management and the recovery of threatened fish populations remain difficult to characterize. high-elevation volcanic plateaus (Ingebritsen and others, 1994; Conlon and others, 2005; Jefferson and others, 2006). 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