2011
DOI: 10.3133/sir20105260
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Regional skew for California, and flood frequency for selected sites in the Sacramento-San Joaquin River Basin, based on data through water year 2006

Abstract: For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprodTo order this and other USGS information products, visit http://store.usgs.gov Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the … Show more

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Cited by 22 publications
(16 citation statements)
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“…The peak flow records at lower‐elevation sites have a higher percentage of winter rainfall AR‐generated peaks, while the higher‐elevation sites have fewer AR‐generated peaks due to the more typical springtime snowmelt runoff. This elevation pattern and mixed population was found when developing the new regional skew values for flood frequency analysis in California [ Parrett et al ., ] and when developing regional regression equations for ungaged basins in the Sierra Nevada hydrologic region [ Gotvald et al ., ].…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The peak flow records at lower‐elevation sites have a higher percentage of winter rainfall AR‐generated peaks, while the higher‐elevation sites have fewer AR‐generated peaks due to the more typical springtime snowmelt runoff. This elevation pattern and mixed population was found when developing the new regional skew values for flood frequency analysis in California [ Parrett et al ., ] and when developing regional regression equations for ungaged basins in the Sierra Nevada hydrologic region [ Gotvald et al ., ].…”
Section: Resultsmentioning
confidence: 99%
“…Mixed populations were recently documented at several high‐elevation U.S. Geological Survey (USGS) streamgaging stations in the Sierra Nevada leading to complications when determining at‐site flood frequency estimates used to develop regional skew and regional regression equations for ungaged basins in California [ Parrett et al ., ; Gotvald et al ., ]. A combination of several large winter‐storm rain peaks and the more typical, smaller magnitude springtime snowmelt peaks were common among these sites [ Gotvald et al ., ].…”
Section: Introductionmentioning
confidence: 99%
“…The USGS gage just downstream from Seven Oaks Dam (USGS 11051500) has an annual peak flow record dating to 1897, and the major tributaries such as Mill Creek, City Creek, and Lytle Creek have USGS gages with records dating to the 1920s. For comparison, we updated these flood‐frequency estimates using the entire period of record for each gage (Parrett et al, ; Veilleux, Cohn, Flynn, Mason, & Hummel, ) and computed transport rates for all sites based on the two different sets of flow estimates. The CoE flood‐frequency estimates were chosen for presentation herein for two reasons: (a) the differences between transport rates computed from the two sets of flow estimates were well within our uncertainty estimates (described below) and (b) the CoE flood‐frequency estimates for the case with Seven Oaks Dam in place are preferable because they are based on reservoir storage and operating rules.…”
Section: Methodsmentioning
confidence: 99%
“…Thus, we replaced the gauge data with estimated natural flows for the 1955-2012 period (Northwest River Forecast Center (NWRFC), unpublished data), which were calculated based on upstream gauges, storage volume, and release rates at Folsom. In this study, we assumed a skew parameter of zero for the LP3 distribution, which is a reasonable assumption for the historic period considering that the calculated station skew at Fair Oaks gauge is −0.035 with a standard deviation of 0.233 [39]. While this assumption may not hold into the future, limited historical records already result in unstable skew parameters [40], and projections of future skew are even more uncertain than mean and standard deviation.…”
Section: Sensitivity Of the Current System To Flood Regime Changesmentioning
confidence: 99%