https://data.amerigeoss.org/dataset/686b2310-24e4-483d-a4b2-5c16d1b74aba
type: Dataset
description: This dataset contains site information, basin characteristics, results of flood-frequency analysis, and a generalized (regional) flood skew for 76 selected streamgages operated by the U.S. Geological Survey (USGS) in the upper White River basin (4-digit hydrologic unit 1101) in southern Missouri and northern Arkansas. The Little Rock District U.S. Army Corps of Engineers (USACE) needed updated estimates of streamflows corresponding to selected annual exceedance probabilities (AEPs) and a basin-specific regional flood skew. USGS selected 111 candidate streamgages in the study area that had 20 or more years of gaged annual peak-flow data available through the 2020 water year. After screening for regulation, urbanization, redundant/nested basins, drainage areas greater than 2,500 square miles, and streamgage basins located in the Mississippi Alluvial Plain (8-digit hydrologic unit 11010013), 77 candidate streamgages remained. After conducting the initial flood-frequency analysis to generate at-site (station) skew and its mean squared error (MSE) for development of the regional flood skew, four streamgages with less than 20 years of pseudo effective record length (PRL) and two streamgages with an excessive amount of censored annual peak flows were removed, leaving 71 streamgages (44 in Arkansas and 27 in Missouri) for use in the study. Flood-frequency analysis was done using the Expected Moments Algorithm (EMA) in version 7.3 of USGS software PeakFQ (Veilleux and others, 2014; England and others, 2019). Ten basin characteristics were tested as explanatory variables in a generalized additive model (GAM) of flood skew, but a lack of statistical significance of the variables, including two-dimensional smooths of the locations of the streamgages and the centroids of their basins, indicated that a weighted mean flood skew of -0.132, with a mean squared error of 0.160 and standard error of 0.400, was appropriate. The regional flood skew agrees well with regional flood skew pr…
issued: 2025-11-22T09:30:54.484884
modified: 20210907
spatial: Location
title: Annual peak-flow data and results of flood-frequency analysis for 76 selected streamflow gaging stations operated by the U.S. Geological Survey in the upper White River basin, Missouri and Arkansas, computed using an updated generalized (regional) flood skew
contact point: Organization
  fn: Daniel M. Wagner
keyword: amerigeo
keyword: amerigeoss
keyword: arkansas
keyword: ckan
keyword: flood-frequency
keyword: geo
keyword: geoss
keyword: missouri
keyword: national
keyword: north-america
keyword: regional-skew
keyword: united-states
keyword: usgs-60c01ba3d34e86b938921612
keyword: weighted-mean
keyword: white-river
theme: {geospatial}

Original Metadata
type: Distribution
description: The metadata original format
format: XML
issued: 2022-07-28T20:41:05.856921
modified: 2025-11-22T09:30:54.475131
access URL: https://data.usgs.gov/datacatalog/metadata/USGS.60c01ba3d34e86b938921612.xml
media type: text/xml

Digital Data
type: Distribution
description: Landing page for access to the data
format: XML
issued: 2022-07-28T20:41:05.856931
modified: 2025-11-22T09:30:54.475564
access URL: https://doi.org/10.5066/P9C3L7IN
media type: application/http

US Migrating
type: Agent