Item talk:Q57592
From geokb
{
"USGS Publications Warehouse": { "schema": { "@context": "https://schema.org", "@type": "CreativeWork", "additionalType": "USGS Numbered Series", "name": "Methods for peak-flow frequency analysis and reporting for streamgages in or near Montana based on data through water year 2015", "identifier": [ { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse IndexID", "value": "sir20185046", "url": "https://pubs.usgs.gov/publication/sir20185046" }, { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse Internal ID", "value": 70196155 }, { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.3133/sir20185046", "url": "https://doi.org/10.3133/sir20185046" } ], "inLanguage": "en", "isPartOf": [ { "@type": "CreativeWorkSeries", "name": "Scientific Investigations Report" } ], "datePublished": "2018", "dateModified": "2018-09-25", "abstract": "This report documents the methods for peak-flow frequency (hereinafter \u201cfrequency\u201d) analysis and reporting for streamgages in and near Montana following implementation of the Bulletin 17C guidelines. The methods are used to provide estimates of peak-flow quantiles for 50-, 42.9-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities for selected streamgages operated by the U.S. Geological Survey Wyoming-Montana Water Science Center (WY\u2013MT WSC). These annual exceedance probabilities correspond to 2-, 2.33-, 5-, 10-, 25-, 50-, 100-, 200-, and 500-year recurrence intervals, respectively.Standard procedures specific to the WY\u2013MT WSC for implementing the Bulletin 17C guidelines include (1) the use of the Expected Moments Algorithm analysis for fitting the log-Pearson Type III distribution, incorporating historical information where applicable; (2) the use of weighted skew coefficients (based on weighting at-site station skew coefficients with generalized skew coefficients from the Bulletin 17B national skew map); and (3) the use of the Multiple Grubbs-Beck Test for identifying potentially influential low flows. For some streamgages, the peak-flow records are not well represented by the standard procedures and require user-specified adjustments informed by hydrologic judgement. The specific characteristics of peak-flow records addressed by the informed-user adjustments include (1) regulated peak-flow records, (2) atypical upper-tail peak-flow records, and (3) atypical lower-tail peak-flow records. In all cases, the informed-user adjustments use the Expected Moments Algorithm fit of the log-Pearson Type III distribution using the at-site station skew coefficient, a manual potentially influential low flow threshold, or both.Appropriate methods can be applied to at-site frequency estimates to provide improved representation of long-term hydroclimatic conditions. The methods for improving at-site frequency estimates by weighting with regional regression equations and by Maintenance of Variance Extension Type III record extension are described.Frequency analyses were conducted for 99 example streamgages to indicate various aspects of the frequency-analysis methods described in this report. The frequency analyses and results for the example streamgages are presented in a separate data release associated with this report consisting of tables and graphical plots that are structured to include information concerning the interpretive decisions involved in the frequency analyses. Further, the separate data release includes the input files to the PeakFQ program, version 7.1, including the peak-flow data file and the analysis specification file that were used in the peak-flow frequency analyses. Peak-flow frequencies are also reported in separate data releases for selected streamgages in the Beaverhead River and Clark Fork Basins and also for selected streamgages in the Ruby, Jefferson, and Madison River Basins.", "description": "Report: vi, 39 p.; Data Releases", "publisher": { "@type": "Organization", "name": "U.S. Geological Survey" }, "author": [ { "@type": "Person", "name": "Sando, Steven K.", "givenName": "Steven K.", "familyName": "Sando", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0003-1206-1030", "url": "https://orcid.org/0000-0003-1206-1030" }, "affiliation": [ { "@type": "Organization", "name": "WY-MT Water Science Center", "url": "https://www.usgs.gov/centers/wyoming-montana-water-science-center" } ] }, { "@type": "Person", "name": "McCarthy, Peter M.", "givenName": "Peter M.", "familyName": "McCarthy", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0003-3194-041X", "url": "https://orcid.org/0000-0003-3194-041X" }, "affiliation": [ { "@type": "Organization", "name": "WY-MT Water Science Center", "url": "https://www.usgs.gov/centers/wyoming-montana-water-science-center" } ] } ], "funder": [ { "@type": "Organization", "name": "WY-MT Water Science Center", "url": "https://www.usgs.gov/centers/wyoming-montana-water-science-center" } ], "spatialCoverage": [ { "@type": "Place", "additionalType": "country", "name": "United States", "url": "https://geonames.org/4074035" }, { "@type": "Place", "additionalType": "state", "name": "Montana" }, { "@type": "Place", "geo": [ { "@type": "GeoShape", "additionalProperty": { "@type": "PropertyValue", "name": "GeoJSON", "value": { "type": "FeatureCollection", "features": [ { "type": "Feature", "geometry": { "type": "Polygon", "coordinates": [ [ [ -105.038405, 45.000345 ], [ -105.848065, 45.000396 ], [ -105.913382, 45.000941 ], [ -105.914258, 44.999986 ], [ -105.928184, 44.993647 ], [ -106.263586, 44.993788 ], [ -107.050801, 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