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Dataset Overview | National Centers for Environmental Information (NCEI)

Valley/stream bottom elevations and sediment thickness/grain size measurements for the lower Patapsco River, Maryland, proximal to Bloede Dam from 1986-11-13 to 2021-08-17 (NCEI Accession 0284223)

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This data set includes valley and stream bottom elevations for the lower Patapsco River, MD, proximal to the former Bloede Dam (removed in 2018). Elevations were taken at fixed transects upstream and downstream of the dam and at greater density in the former reservoir area. Above average flows in August 2018 made some parts of the channel through the impoundment too deep to survey with the total station, so some data for this survey were collected with a boat-mounted echosounder. The data set also includes qualitative and quantitative sediment texture characterizations at the fixed transects (facies maps and grain size measurements, respectively) and sediment cores taken in the former reservoir to estimate stored sediment thickness and grain size. Data were submitted to NCEI in the format of CSV, KMZ, and PDF files.

All pre-2018 spatial data are horizontally referenced to NAD 1983 State Plane Maryland FIPS 1900 in US Survey Feet; vertical: NAVD88, international feet. This includes the file "Approximate limit of stored sediment.kmz". Two exceptions are the files "Left limit lidar elevations (2015).kmz" and "Inferred depths.kmz" for which the vertical is NAVD88, US Survey Feet. For all spatial data collected in 2018 and after, the horizontal reference is NAD 1983 (2011) State Plane Maryland FIPS 1900, US Survey Feet, and the vertical is NAVD88, international feet.

To access aerial imagery supporting SfM photogrammetry associated with this project, please see the Data_README file for the link to a separate NCEI accession.
  • Cite as: Collins, Mathias J.; Van Ryswick, Stephen (2023). Valley/stream bottom elevations and sediment thickness/grain size measurements for the lower Patapsco River, Maryland, proximal to Bloede Dam from 1986-11-13 to 2021-08-17 (NCEI Accession 0284223). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0284223. Accessed [date].
gov.noaa.nodc:0284223
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Distribution Formats
  • CSV
  • KMZ
  • KML
  • PDF
  • Text File
Ordering Instructions Contact NCEI for other distribution options and instructions.
Distributor NOAA National Centers for Environmental Information
+1-301-713-3277
ncei.info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Time Period 1986-11-13 to 2021-08-17
Spatial Bounding Box Coordinates
West: -76.791
East: -76.687
South: 39.211
North: 39.265
Spatial Coverage Map
General Documentation
Associated Resources
  • Collins, M.J., Baker, M.E., Cashman, M.J., Miller, A. & Van Ryswick, S. (2024). Impounded sediment and dam removal: Erosion rates and proximal downstream fate. Earth Surface Processes and Landforms, 49(9), 2690-2703. Available from: https://doi.org/10.1002/esp.5850
Publication Dates
  • publication: 2023-12-07
  • revision: 2024-05-17
  • creation: 2023-10-20
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Historical archive - data has been stored in an offline storage facility
Data Update Frequency As needed - NCEI Accession 0284223 was revised and a new version of the archival package was published. Updates to existing archival packages may provide additional files or replace obsolete files. The latest version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. Please see journal.txt in the /about directory for additional details on changes made.
Supplemental Information
In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number.
Purpose These data were collected to support studies of environmental response to dam removal. They were used in the analyses of a forthcoming publication entitled "Impounded sediment and dam removal: erosion rates and proximal downstream fate" by Collins et al.
Use Limitations
  • accessLevel: public
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Dataset Citation
  • Cite as: Collins, Mathias J.; Van Ryswick, Stephen (2023). Valley/stream bottom elevations and sediment thickness/grain size measurements for the lower Patapsco River, Maryland, proximal to Bloede Dam from 1986-11-13 to 2021-08-17 (NCEI Accession 0284223). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0284223. Accessed [date].
Cited Authors
Collaborators
  • Stephen Van Ryswick
    Maryland Geological Survey
Contributors
Resource Providers
Points of Contact
Publishers
Acknowledgments
  • Funding Agency: NOAA Office of Habitat Conservation (NMFS/OHC)
  • Funding Agency: US DOI; Fish and Wildlife Service
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • landHydrology
Global Change Master Directory (GCMD) Science Keywords Provider Keywords
  • elevation
  • sediment facies
  • sediment grain size
  • sediment thickness
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords Provider Instruments
  • echo sounder
  • total station
Place keywords Provider Location Keywords
  • Lower Patapsco River
  • Maryland
Keywords NCEI ACCESSION NUMBER
Keywords Send2NCEI Submission Package ID
  • UC81P7
Use Constraints
  • Cite as: Collins, Mathias J.; Van Ryswick, Stephen (2023). Valley/stream bottom elevations and sediment thickness/grain size measurements for the lower Patapsco River, Maryland, proximal to Bloede Dam from 1986-11-13 to 2021-08-17 (NCEI Accession 0284223). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0284223. Accessed [date].
Access Constraints
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Fees
  • In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Processing Steps
  • 2023-12-07T20:31:06Z - NCEI Accession 0284223 v1.1 was published.
  • 2024-03-25T23:11:44Z - NCEI Accession 0284223 was revised and v2.2 was published.
    Rationale: Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.
  • 2024-05-17T23:56:08Z - NCEI Accession 0284223 was revised and v3.3 was published.
    Rationale: Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.
Output Datasets
Lineage information for: dataset
Processing Steps
  • Parameter or Variable: CORE - BOTTOM (measured); Units: international feet; Observation Category: in situ; Sampling Instrument: sediment sampler - corer; Sampling and Analyzing Method: visual and textural description by measured depth horizons
  • Parameter or Variable: sediment facies (measured); Units: square feet (US Survey Feet); Observation Category: in situ; Sampling and Analyzing Method: visual estimate
  • Parameter or Variable: SEDIMENT - GRAIN SIZE (measured); Units: millimeter; Observation Category: in situ; Sampling and Analyzing Method: Wolman pebble counts
  • Parameter or Variable: SEDIMENT - GRAIN SIZE (measured); Units: millimeter; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - grab; Sampling and Analyzing Method: laboratory sieve and hydrometer analyses
  • Parameter or Variable: elevation (measured); Units: international feet; Observation Category: in situ; Sampling Instrument: total station with prism pole; Sampling and Analyzing Method: standard elevation survey methods
Acquisition Information (collection)
Instrument
  • echo sounder
  • sediment sampler - corer
  • sediment sampler - grab
  • visual estimate
Last Modified: 2026-08-26T19:03:35Z
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