Methods for estimating the magnitude and frequency of peak streamflows at ungaged sites in and near the Oklahoma Panhandle

Abstract

BSLDEM10M Mean drainage-basin slope CANOPY_PCT Percentage of forest-canopy cover CONTDA Contributing drainage area CSL10_85FM 10-85 stream channel slope GIS Geographic information system GLS Generalized least squares IACWD Interagency Advisory Committee on Water Data IMPNLCD01 Percentage of impervious cover LC01CROP Percentage of drainage area with crop cover LPIII Log-Pearson Type III LOWESS Locally weighted scatterplot smoothing NWISWeb National Water Information System Website ODOT Oklahoma Department of Transportation OK_HIPERMA Percentage of drainage area on the High Plains aquifer OLS Ordinary least squares OUTLETELEV Outlet elevation

Methods for estimating the magnitude and frequency of peak streamflows for unregulated streams in Oklahoma developed by using streamflow data through 2017

“…Details regarding the basin characteristics listed in table 2 are available in the accompanying data release (Labriola and others, 2019). Basin characteristics were calculated for each streamgage by using GIS techniques and the USGS StreamStats application others, 2004, 2008;Smith and Esralew, 2010) to ensure consistency and reproducibility. Regression equations and flow statistics at streamgages are integrated into the USGS StreamStats Web-based tool available at http://water.usgs.gov/ osw/streamstats/index.html (USGS, 2016).…”

“…StreamStats allows users to obtain flow statistics, basin characteristics, and other information for user-selected stream locations. The user can select a stream location on a GIS-based interactive map of Oklahoma, and StreamStats will delineate the drainage basin upstream from the selected location, compute basin characteristics, and compute flow statistics at the ungaged stream location by using regression estimates (Smith and Esralew, 2010).…”