Subdivision of the Quaternary Alluvium East of the Front Range Near Denver, Colorado

Scott, G. R.

doi:10.1130/0016-7606(1960)10[1541:sotqae]2.0.co;2

Cited by 43 publications

(92 citation statements)

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“…The most important soil properties that are used for correlation in this study include the presence or thickness of organic-rich A horizons, carbonate accumulation, and color. In addition, Bureau of Reclamation and other researchers have conducted paleoflood, geomorphic, and geologic investigations in the region of this study; radiocarbon data and soil properties from these previous studies were used to estimate the age of deposits for this study by correlating terrace surfaces and their associated soil properties (Hunt, 1954;Scott, 1960;Scott, 1963;Machette, 1985;Cornwell, 1986;May, 2003).…”

Section: Methodology Used To Identify Non-exceedance Bounds and Respementioning

confidence: 99%

Paleoflood investigations to improve peak-streamflow regional-regression equations for natural streamflow in eastern Colorado, 2015

Kohn¹,

Stevens²,

Harden³

et al. 2016

Scientific Investigations Report

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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://store.usgs.gov/.Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.Suggested citation: Kohn, M.S., Stevens, M.R., Harden, T.M., Godaire, J.E., Klinger, R.E., and Mommandi, Amanullah, 2016, Paleoflood investigations to improve peak-streamflow regional-regression equations for natural streamflow in eastern Colorado, 2015: U.S. Geological Survey Scientific Investigations Report 2016-5099, 58 p., http://dx.doi.org/10.3133/sir20165099. ISSN 2328-0328 (online) iii AcknowledgmentsThe authors would like to recognize Robert Jarrett, formerly of the U.S. Geological Survey (USGS), who was instrumental in helping develop the concept for this study and a plan to execute it. Julie Kiang of the USGS offered invaluable technical assistance during the undertaking of the study. Graph showing relation between 1-percent annual exceedance-probability discharges computed from the peak-streamflow regional-regression equations in the Foothills and Plains hydrologic regions of Colorado and the 1-percent annual exceedance-probability discharges computed from the peak-streamflow regional-regression equations in Capesius and Stephens (2009) Conversion FactorsInch/Pound to International System of Units Elevation, as used in this report, refers to distance above the vertical datum.Water year in this report is defined as the period from October 1st of one year through September 30th of the following year and is named for the year of the ending date. equations and when eastern Colorado was divided into two separate hydrologic regions. To make further reductions in the uncertainties of the peak-streamflow regional-regression equations in the Foothills and Plains hydrologic regions, additional streamgages or crest-stage gages are needed to collect peakstreamflow data on natural streams in eastern Colorado. Generalized-Least Squares regression was used to compute the final peak-streamflow regional-regression equations for peakstreamflow. Dividing eastern Colorado into two new individual regions at -104° longitude resulted in peak-streamflow regionalregression equations with the smallest SEP. The new hydrologic region located between -104° longitude and the Kansas-Nebraska State line will be designated the Plains hydrologic region and the hydrologic region comprising the rest of eastern Colorado located west of the -104° longitude and east of the Rocky Mountains and below 7,500 feet in the South Platte River Basin and below 9,000 feet in the Arkan...

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Section: Methodology Used To Identify Non-exceedance Bounds and Respementioning

confidence: 99%

Paleoflood investigations to improve peak-streamflow regional-regression equations for natural streamflow in eastern Colorado, 2015

Kohn¹,

Stevens²,

Harden³

et al. 2016

Scientific Investigations Report

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show abstract

“…Broadway Alluvium is considered coeval with the Pinedale glaciation (Bryan and Ray, 1940;Hunt, 1954;Scott, 1960Scott, , 1975Madole, 1991), which spanned from >31 ka to about 15-13 ka (Nelson and others, 1979;Madole, 1986;Schildgen and others, 2002;others, 2004, 2007;Licciardi and Pierce, 2008;Madole and others, 2010;Young and others, 2011;Schweinsberg and others, 2016). Fluvial sediment load may have been greatest during and shortly after deglaciation (Church and Ryder, 1972;Madole, 1991;Schildgen and others, 2002;Lindsey and others, 2005), a process that started either about 17 ka (Licciardi and others, 2004;Benson and others, 2005;Schaefer and others, 2006) or about 16-15 ka (Young and others, 2011) and largely was completed between about 15 and 13 ka (Benson and others, 2007;Young and others, 2011;and references therein).…”

Section: Mainstream Deposits Of Broadway Alluvium (Late Pleistocene)-mentioning

confidence: 99%

“…Age of Verdos Alluvium is constrained by its association with the Lava Creek B ash (Scott, 1960;Madole, 1991;Kellogg and others, 2008; and references therein), which erupted from the Yellowstone Plateau volcanic field about 640 ka (Lanphere and others, 2002). Beds of Lava Creek B ash in Verdos Alluvium have been documented at several sites along the South Platte River corridor northeast of Weldona 7.5΄ quadrangle (Scott, 1978(Scott, , 1982Izett and Wilcox, 1982) Eolian sand (Holocene and late Pleistocene)-Forms simple and compound parabolic dunes and low-relief sand sheets.…”

Section: Mainstream Deposits Of Broadway Alluvium (Late Pleistocene)-mentioning

confidence: 99%

Geologic map of the Weldona 7.5' quadrangle, Morgan County, Colorado

Berry¹,

Taylor²,

Slate³

et al. 2018

Scientific Investigations Map

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“…An extensive collection of studies has examined the alluvial aquifer of the South Platte River and its tributaries. Stratigraphy of the alluvial deposits was originally described by Hunt (1954) and Scott (1960) and later by Scott (1963). Several workers developed maps of the extent, thickness, and depth to water of the South Platte alluvial aquifer beginning in the 1950s (Bjorklund and Brown, 1957;Smith and others, 1964;Duke and Longenbaugh, 1966;Nelson, Haley, Patterson, & Quirk, Inc., 1967;Hurr and others, 1972 a, b, c;Hurr and others, 1975;Konikow, 1975;Nadler and Schumm, 1981;Robson and others, 2000 a, b).…”

Section: Previous Workmentioning

confidence: 99%

Evaluation of groundwater levels in the South Platte River alluvial aquifer, Colorado, 1953-2012, and design of initial well networks for monitoring groundwater levels

Wellman¹

2015

Scientific Investigations Report

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Subdivision of the Quaternary Alluvium East of the Front Range Near Denver, Colorado

Cited by 43 publications

References 0 publications

Paleoflood investigations to improve peak-streamflow regional-regression equations for natural streamflow in eastern Colorado, 2015

Paleoflood investigations to improve peak-streamflow regional-regression equations for natural streamflow in eastern Colorado, 2015

Geologic map of the Weldona 7.5' quadrangle, Morgan County, Colorado

Evaluation of groundwater levels in the South Platte River alluvial aquifer, Colorado, 1953-2012, and design of initial well networks for monitoring groundwater levels

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