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The Atlas of Oregon ranks 31 rivers in the state by average streamflow; the top five are the Columbia, Snake, Willamette, Santiam, and Umpqua. [1] Not all Oregon rivers with high average flows are on this list of longest streams because neither their main stems nor any of their tributaries (including what are called "forks") are at least 50 ...
The United States Geological Survey ((USGS)) is a publicly available source of remotely sensed hydrological data. Historical and real-time streamflow data are also available via the internet from sources such as the National Weather Service (NWS) and the United States Environmental Protection Agency (EPA). A benefit of using GIS softwares for ...
Real-time streamflow data is integral for decision making (e.g., evacuations, or regulation of reservoir water levels during flooding). [43] Streamflow data can be estimated by data provided by stream gauges, which measure the water level of a river. However, water and debris from flooding may damage stream gauges, resulting in lack of ...
The site and region data include the highway-site characteristics, the ecoregions, the upstream-basin characteristics, and, if a lake analysis is selected, the lake-basin characteristics. The hydrologic data include precipitation, streamflow, and runoff-coefficient statistics.
autocorrelation method to compare streamflow data to itself by shifting or "lagging" initial discharge dataset 1 time unit. A Lag-10 would mean the initial data is shifted 10 days, then is compared to an unshifted version of the data. Not to be confused with lag time. Lag time the time interval from the maximum rainfall to the peak discharge.
It then flows southeast through the west side of the city and the Oregon State University campus to enter the river near Reser Stadium and Avery Park. It passes under U.S. Route 20 , concurrent here with Oregon Route 34 , between the stadium and Marys River, about 1 mile (1.6 km) from its confluence with the Willamette River .
A stream gauge provides continuous flow over time at one location for water resource and environmental management or other purposes. Streamflow values are better indicators than gage height of conditions along the whole river. Measurements of streamflow are made about every six weeks by United States Geological Survey (USGS) personnel. They ...
USGS operates a number of water-related programs, notably the National Streamflow Information Program [23] and National Water-Quality Assessment Program. [24] USGS Water data is publicly available from their National Water Information System [25] database.