David J Dean Paul E Grams Ronald E Griffiths Joel A Unema Shannon L Sartain David J Topping 20241023 tabular data Flagstaff, AZ U.S. Geological Survey Additional information about Originators: Dean, David J, https://orcid.org/0000-0003-0203-088X; Grams, Paul E, https://orcid.org/0000-0002-0873-0708; Griffiths, Ronald, https://orcid.org/0000-0003-3620-2926; Unema, Joel A, https://orcid.org/0000-0002-7428-219X; Sartain, Shannon L, https://orcid.org/0000-0003-2395-6825; Topping, David, https://orcid.org/0000-0002-2104-4577 https://doi.org/10.5066/P13MZCVJ Merrill, M. D. Pierce, P. E. Meister, C. C Jones, M. M Karacan, C. Ö. Wiens, A. M. Warwick, P. D. Shaffer, B. N. 2025 publication Earths Future v. 13 N/A American Geophysical Union https://doi.org/10.3133/sir20255075 These data were compiled to determine the rate and magnitude of channel-planform change, and the topographic change of the channel and floodplain in Echo, Island, and Rainbow Parks within Dinosaur National Monument between the 1990s and 2019. The objective(s) of our study were to analyze geomorphic change within Echo, Island, and Rainbow Parks to determine the magnitude and style of channel change with respect to the past two decades of combined streamflow from Flaming Gorge Dam and the relatively unregulated Yampa River. These data represent river channel planform delineations made within a geographic information system, and topographic channel and floodplain data collected using total stations, depth sounders, Real-Time Kinematic GNSS, and multibeam sonar. These data were collected by U.S. Geological Survey, Southwest Biological Science Center, Grand Canyon Monitoring and Research Center researchers in June 2019. The purpose of these data are to determine the amount of change to the channel and floodplain. Researchers in the future could use our data to measure continued channel and floodplain change. These data provide channel planform data delineated on aerial photographs, and topographic data of the channel and floodplain obtained with ground-surveys within Echo, Island, and Rainbow Parks in Dinosaur National Monument. Channel planform data were digitally mapped on aerial photographs between the 1990s and 2018. Total station data were collected between 1993 and 1998, with bathymetric data collected using a depth sounder. RTK GNSS and multibeam sonar data were collected in June 2019, whereby the sub-aerial topography were collected using RTK GNSS surveys, and bathymetry was collected using multibeam sonar. These data can be used to analyze changes in past channel and floodplain conditions and may be used as a baseline for future analyses of topographic change. Data users should read the entire metadata record and acquire the manuscript identified as the ‘Larger Work Citation’ to have a complete understanding of how these data were created and used. These data are specific to the uses identified above, as described in the ‘Larger Work Citation’, and any other use of these data would be inappropriate. See 'Distribution liability' statements for more information. 1993 1994 1995 1996 2019 observed Complete None planned -109.1937064 -108.9539165 40.6016409 40.4220173 USGS Thesaurus bathymetry bathymetry measurement controlled flooding datasets digital elevation model erosion geology geologic processes geomorphology hydrology natural resource management sand deposits sedimentation topographic maps topography unconsolidated deposits USGS Metadata Identifier USGS:66e218afd34ecba8b8677ac6 USGS information products data release ISO 19115 Topic Categories elevation environment geoscientificInformation imageryBaseMapsEarthCover inlandWaters None dam deposition (sediment) sand surface change Geographic Names Information System (GNIS) Colorado Echo Park Green River Island Park Rainbow Park Utah Yampa River Getty Thesaurus of Geographic Names Dinosaur National Monument Flaming Gorge Dam No access constraints No use constraints. License, Creative Commons Zero v1.0 Universal. David J Dean U.S. Geological Survey Research Hydrologist mailing and physical

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Flagstaff AZ 86001 US 928-556-7297 djdean@usgs.gov We'd like to thank Mark Wondzell at the National Park Service Water Resources Division for funding the data collection herein and the analyses within the associated Scientific-Investigations Report. TBD 2022 TBD (online) TBD https://doi.org/XXXX The unique values for each attribute field were reviewed and checked for spelling, consistency of terms, accuracy, adherence to controlled vocabularies, and completeness. Attribute values are within expected ranges. Range queries were conducted to confirm that numerical values were not outside a reasonable range for a particular field. Outlier checks were performed by plotting numerical values bounded within a range. Bounding dates were confirmed as correct. Site coordinates were reviewed with ArcGIS mapping software. Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. No formal positional accuracy tests were conducted No formal positional accuracy tests were conducted Development of the CrossSection_Data_1990s table: Between November 1993 and September/October 1994, Utah State University established a network of 66 cross sections extending from approximately 1.5 kilometer downstream from Flaming Gorge Dam (FGD) to Split Mountain Canyon, within Dinosaur National Monument. The endpoints of these cross sections were monumented with either rebar or fence posts. In some cases, existing fence posts were used as monuments. Topographic data were collected in a local coordinate system and were not georeferenced. The topography of the floodplain at these cross sections was measured using a total station, and the topography of the wetted portion of the channel was measured with a depth sounder. Endpoint locations were georeferenced in 2019 with Real-time kinematic (RTK) Global Navigation Satellite System (GNSS) surveys, and geoid elevations were calculated after georeferencing the endpoints. 2022 Development of CrossSection_Data_2019 data table: RTK GNSS resurveys of the cross sections originally established in the 1990s were conducted in 2019. The cross section endpoints established in the 1990s were located in the field and then surveyed to georeference them to UTM Zone 12N coordinates. The emergent topography along each cross-section was measured by surveying along the line connecting the two endpoints of the cross section using the “stake out” procedure in Trimble Access data collection software. Submerged bathymetry was measured using a Norbit iWBMSh multibeam echosounder with an integrated Applanix OceanMaster GNSS-aided inertial navigation system. Bathymetric elevations measured with the multibeam sonar were extracted along each cross section line and merged with the RTK GNSS data of the emergent topography to obtain topographic data along the entire cross section. 2022 Data Quality Assessment and Quality Control (QAQC): Total station and RTK GNSS data were collected using standard techniques. In the field, repeat backsight measurements using the total station were made to ensure accuracy over time and space. The accuracy of the RTK GNSS surveys were maintained and verified using resurveys of benchmarks and/or control points in the field to ensure no spatial inconsistencies were present. Multibeam data were acquired with a Norbit iWBMSh multibeam echosounder with integrated Applanix POS-MV Oceanmaster inertial navigation system. Data were collected within Hypack 2017 software using RTK positioning with a base station receiver setup on a stable reference point. Data were post-processed using PosPac MMS v8.0 to compute the smoothed best estimate of boat trajectory (SBET) for the surveys. Raw data were edited by hand, and using Hypack filters, to remove bad soundings, and the SBET files were applied to the edited data. Edited soundings were filtered within Hypack to a uniform density of 1 point per 0.25 m2 in Island Park, and 1 point per 0.5 m2 in Rainbow Park, using the mean elevation for each grid cell. Quality Assurance (QA) - Resurveys of control points and benchmarks in the field were conducted to ensure quality assurance. Quality Control (QC) - Following field data collection, all data was reviewed for errors in the total station, RTK GNSS, and multibeam sonar data. Suspect data with large error were removed from analysis. 2022 Finalize Data for Dissemination: Data sent to the Southwest Biological Science Center Data Steward for dissemination and preservation per USGS Data Management Policies SM 502.6, SM 502.7, SM 502.8 and SM 502.9 (1 October 2016). 2024 CrossSection_Data_1990s This data table represents topographic data collected along channel cross sections using total stations and depth sounders in Echo, Island, and Rainbow Parks in Dinosaur National Monument 1993 to 1996. These data were collected to serve as a topographic baseline from which subsequent geomorphic change could be determined. The purpose of this data table is to serve the historical topographic data for people interested in analyzing channel and floodplain changes in Dinosaur National Park. Producer defined Cross_Section This attribute in the data table represents the assigned number to each cross section when the cross sections were established in the 1990s. The attribute values represent the cross section number. Cross section 48 is subdivided by; "a" which refers the most upstream cross section, "b" which refers the second most upstream cross section, "c" which refers the third most upstream cross section, and "d" which refers the most downstream cross section. Producer defined 34 56 integer number Point This attribute in the data table represents the data point along each cross section line. Producer defined 1 113 integer number Distance_m This attribute in the data table represents the distance along the cross section line, measured from the left end point. Producer defined 0 574.3609642 meters Elevation_Local_m This attribute in the data table represents the local elevation relative to an arbitrary datum. Producer defined 68.651 1000.853 meters Elevation_Geoid18_m This attribute in the data table represents the georeferenced ground surface elevations using the North American Datum of 1983, and the UTM coordinate system Zone 12N. Ground surfaces were obtained using Geoid 2018A. The attribute values represent the georeferenced ground surface elevations using the North American Datum of 1983, and the UTM coordinate system Zone 12. Ground surfaces were obtained using Geoid 2018. Producer defined 1501.447683 1548.8568 meters Code This attribute in the data table represents a descriptive code for some points. When blank, data point represents a standard topographic point. Producer defined The various attribute values (number, letters & words) represent endpoint number or edges of water for each cross section. Date_Surveyed This attribute in the data table represents the date of data point collection. Producer defined 11/17/1993 6/20/1996 mm/dd/yyyy CrossSection_Data_2019 This data table represents topographic data collected along channel cross sections using RTK GNSS and multibeam sonar in Echo, Island, and Rainbow Parks in Dinosaur National Monument in 2019. These data are repeat surveys of the cross sections initially established in the 1990s. The purpose of this data table is to serve the historical topographic data for people interested in analyzing channel and floodplain changes in Dinosaur National Park. Producer defined Cross_Section This attribute in the data table represents the assigned number to each cross section when the cross sections were established in 2019. The attribute values represent the cross section number. Cross section 48 is subdivided by; "a" which refers the most upstream cross section, "b" which refers the second most upstream cross section, "c" which refers the third most upstream cross section, and "d" which refers the most downstream cross section. Producer defined 34 56 integer number Point This attribute in the data table represents the data point along each cross section line. Producer defined 1 381 integer number Easting_m This attribute in the data table represents the easting of each data point relative to the origin of the UTM zone, UTM Zone 12N, NAD83 2011. Producer defined 654686.856 670484.888 meters Northing_m This attribute in the data table represents the northing of each data point relative to the origin of the UTM zone, UTM Zone 12N, NAD83 2011. Producer defined 4484238.088 4488305.548 meters Distance_m This attribute in the data table represents the distance along the cross section line, measured from the left end point. Producer defined 0 598.4618484 meters Ellipsoid_ht_m This attribute in the data table represents the ellipsoid height of each point collected durign RTK GNSS surveys. Producer defined 1488.859 1565.007 meters Elevation_Geoid18_m This attribute in the data table represents the ground surface elevation of each point collected durign RTK GNSS surveys, calculated using Geoid 2018. The attribute values represent the ground surface elevation of each point collected durign RTK GNSS surveys, calculated using Geoid 2018. Producer defined 1501.524048 1554.504 meters Code This attribute in the data table represents a descriptive code for some points. When blank, data point represents a standard topographic point. Producer defined The various attribute values (number, letters & words) represent descriptive codes for points along the cross section. When blank, data point represents a standard topographic point. Date_Surveyed This attribute in the data table represents the date of data point collection. Producer defined 6/6/2019 6/18/2019 mm/dd/yyyy Geoid_Separation_m This attribute in the data table represents the separation between the Geoid and Ellipsoid. Producer defined -15.993 -15.562 meters GS ScienceBase U.S. Geological Survey mailing and physical

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Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov The author(s) of these data request that data users contact them regarding intended use and to assist with understanding limitations and interpretation. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. This file contains data available in comma-separated values (csv) format. The user must have software capable of displaying the data table. 20250930 David J Dean U.S. Geological Survey Research Hydrologist mailing and physical

2255 North Gemini Drive

Flagstaff AZ 86001 US 928-556-7297 djdean@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998