3) Streambed particle data

Metadata Updated: November 12, 2020

Seventeen streamflow-gaging stations, operated by the U.S. Geological Survey and distributed across the Ouachita Mountains of Arkansas and Oklahoma were selected for analysis. Bed material sampling was conducted to obtain information on the particle-size distributions of the streambed materials and to determine the shapes of the individual particles comprising the streambeds. Information on stream-bed particle-size distribution was used to compute the potential rate of bed-load transport and is a parameter used in the Rosgen (Rosgen, 1996) stream reach classification system. Streambed-material particle sizes were measured using two methods. The first method was Wolman pebble counts conducted across the riffles and pools within each study reach. A step-toe procedure was used to collect approximately 100 samples at each riffle and pool. Materials only from the active streambed were measured. For each sample the longest (A) axis, intermediate (B) axis, and shortest (C) axis were measured and recorded. From this pebble count data the bedrock tallies were removed and cumulative frequency curves were developed, from which the median (D50) and one standard deviation from the median (D16 and D84) particle sizes were determined. Bedrock is defined as any exposure of native solid rock in the streambed or along the streambanks. The second streambed-material particle-size sampling method was a sieve analysis of bar samples. A 5-gallon pail (approximately 50 – 60 lbs) of bar gravel was collected from the downstream face of a point-bar approximately 1/3 of the way down the face. The sample was dried and weighed to the nearest 0.1 of a gram to determine the total sample weight. The sample was then placed in a nest of sieves and a mechanical sieve shaker was used to shake the sample particles through the sieves. Next, the particles from each sieve were removed and weighed. The final total weights retained on each sieve were summed and compared to the original total weight before sieving. From the weight retained on each sieve cumulative frequency curves were developed, the median (D50) and one standard deviation from the median (D16 and D84) particles sizes were determined. References Rosgen, D.L., 1996, Applied river morphology: Pagosa Springs, Colorado, Wildland Hydrology Books, 390 p. This child item contains particle information for the 17 study sites. The data for each site is in a zipped file including: 1) Tables with study site Wolman pebble and bar measurements (CSV files). 2) Graphs of streambed particle size cumulative frequency curves and particle shape analysis (JPG files).

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License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Date May 23, 2019
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) January 1, 2019 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from DOI Open Data

Additional Metadata

Resource Type Dataset
Metadata Date May 23, 2019
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) January 1, 2019 (publication)
Responsible Party U.S. Geological Survey, Lower Mississippi-Gulf Water Science Center (Point of Contact)
Contact Email
Guid
Access Constraints Use Constraints: 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 contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner whenever applicable. The data have been approved for release and publication by the U.S. Geological Survey (USGS). Although the data have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, the data are released on the condition that neither the USGS nor the U.S. Government may be held liable for any damages resulting from authorized or unauthorized use. Although the data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Users of the data are advised to read all metadata and associated documentation thoroughly to understand appropriate use and data limitations., Access Constraints: none
Bbox East Long -91.837463378855
Bbox North Lat 35.263204615158
Bbox South Lat 34.229609065849
Bbox West Long -94.633483886561
Coupled Resource
Frequency Of Update notPlanned
Licence 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 contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner whenever applicable. The data have been approved for release and publication by the U.S. Geological Survey (USGS). Although the data have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, the data are released on the condition that neither the USGS nor the U.S. Government may be held liable for any damages resulting from authorized or unauthorized use. Although the data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Users of the data are advised to read all metadata and associated documentation thoroughly to understand appropriate use and data limitations.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2001-01-01
Temporal Extent End 2016-01-01

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