Li H. Erikson Curt D. Storlazzi Gerry A. Hatcher Thomas E. Reiss Anita C. Engelstad 20221217 comma-delimited text data release DOI: 10.5066/P94V9W0S Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P94V9W0S Li H. Erikson Curt D. Storlazzi Brian D. Collins Gerry A. Hatcher Thomas E. Reiss Anita C. Engelstad 2022 data release DOI: 10.5066/P94V9W0S Pacific Coastal and Marine Science Center, Santa Cruz, CA U.S. Geological Survey https://doi.org/10.5066/P94V9W0S Bathymetry data were collected in the Wainwright Inlet, the mouth of the Kuk River, and in the nearshore region off Wainwright, Alaska, in August of 2009. Bathymetry was measured with a single-beam echo-sounder (10 Hz 144 ODOM Echotrac CV-100) mounted on the stern of a small vessel and synchronized to a 145 Real-Time Kinematic (RTK) Global Positioning Systems (GPS). The depth is measured relative to approximate Mean Sea Level (see attribute accuracy report in this file for further details on the MSL), and depth values are meters below the water surface. The GPS sampling rate was 1 Hz with vehicle speeds maintained at less than 15 km/hour, resulting in a sample point resolution of 3-5 meters. Data are available in a single csv file. Data were obtained to provide baseline information and to support the development of numerical models for assessing past and future coastal hazards. These data are intended for policy makers, resource managers, science researchers, students, and the general public. These data are not intended to be used for navigation. Additional information about the field activity from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=TM109AR Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20090813 20090818 ground condition at time data were collected Complete None planned -160.14601 -159.95314 70.56534 70.64741 USGS Metadata Identifier USGS:d6c09a87-69b8-46b0-bd73-717521d30a96 ISO 19115 Topic Category geoscientificInformation Marine Realms Information Bank (MRIB) keywords seabed tidal inlet single-beam echo sounder Data Categories for Marine Planning Bathymetry and Elevation USGS Thesaurus bathymetry bathymetry measurement sea-floor characteristics geospatial datasets single-beam echo sounder None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC Geographic Names Information System (GNIS) State of Alaska Chukchi Sea Wainwright Kuk River Wainwright Inlet None USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Bathymetry_Measurement_Locations.png Satellite image showing the areas where bathymetry data were collected JPEG Data were post-processed using Trimble and MATLAB on a PC equipped with Windows 7 and 10 operating systems. There is no established vertical geodetic, nor tidal datum for much of Arctic Alaska, including where this study took place. A mean sea level elevation was estimated using data measured with the NortekTM pressure sensor (see 2009TimeSeriesData_WaterDepths*) and is considered a proxy for a local mean sea level datum in the study area. Reported bathymetry is relative to that datum. No formal accuracy assessment was performed. All data fall within expected ranges. Dataset is considered complete for the information presented, as described in the abstract. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. The horizontal positioning errors are estimated to be plus/minus 0.1 m, based on system configuration, sea state (waves, local tides), vessel speed and the assumed speed of sound in water (1500 m/s). A formal accuracy assessment of the vertical positional information in the data set has not been conducted. The vertical positioning errors are estimated to be plus/minus 0.15 m, based on system configuration, sea state (local tides, waves), vessel speed and the assumed speed of sound in water (1500 m/s). Single-beam bathymetry data were collected using a single-beam echo-sounder (10 Hz 144 ODOM Echotrac CV-100) mounted on the stern of a small vessel and synchronized to a 145 RTK/GPS. Data were processed using SonarWiz software and depths were extracted using automated bottom tracking methods. Depth values are given in meters below the water surface. 20091009 Point Point 53909 0.00001 0.00001 Decimal degrees WGS 1984 WGS_1984 6378137.0 298.257223563 approximately Mean Sea Level 0.01 meters Explicit elevation coordinate included with horizontal coordinates 2009BathymetryData_.csv File containing geographic coordinates and bathymetry measurements Producer defined Latitude(deg_WGS84) Latitude coordinate Producer defined 70.56534 70.64741 Decimal degrees 0.00001 Longitude(deg_WGS84) Longitude coordinate Producer defined -160.14601 -159.95314 Decimal degrees 0.00001 Depth(m) Water depth at time of collection Producer defined 1.04 17.61 meters 0.01 The first line of the csv file is a header line. U.S. Geological Survey U.S. Geological Survey - CMGDS mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Resource_Description: These data are available in csv format 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 on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. comma-delimited text csv contains bathymetry data No compression applied. 1.3 https://doi.org/10.5066/P94V9W0S Data can be downloaded using the Network_Resource_Name link then scrolling down to the Sonar Data section. None. The csv data can be viewed with any text reading software. 20221217 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998