Identification_Information: Citation: Citation_Information: Originator: Horen, K.C. Originator: Christian, J.E. Originator: Doiron, Nadine Originator: Poisson, A.C. Originator: Siemsen, Z.J. Publication_Date: 2023 Title: Single-beam bathymetric data near Chefornak, Alaska, collected August 17, 2022 Geospatial_Data_Presentation_Form: csv Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2023-11 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 8 p. Online_Linkage: https://doi.org/10.14509/31009 Description: Abstract: Single-beam bathymetric data near Chefornak, Alaska, collected August 17, 2022, Raw Data File 2023-11, provides bathymetric data collected near Chefornak, Alaska, on August 17, 2022. The purpose of this survey is to provide bathymetric data for the assessment of coastal hazards and riverine erosion studies. These data were collected using an M2Ocean Hydroball integrated bathymetric sensor and processed using CIDCO DepthStar software. Coincident Global Navigation Satellite System (GNSS) base station and water level time series data were collected using Trimble survey equipment and a Solinst Levelogger pressure and temperature sensor, respectively, to correct horizontal and vertical positions. This data product does not meet the International Hydrographic Organization (IHO) bathymetric coverage standard (IHO, 2022), is not intended for use in determining navigability, and is released as a Raw Data File with an open end-user license. The data are available from the DGGS website: http://doi.org/10.14509/31009. Purpose: This work provides bathymetric data for the assessment of coastal hazards and riverine erosion studies. Supplemental_Information: >bathymetry: Bathymetric sounding data delivered in comma delimited (CSV) format with column headers and accompanied by a data dictionary detailing the header names, definitions, and applicable units. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20220917 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -164.286386 East_Bounding_Coordinate: -164.257200 North_Bounding_Coordinate: 60.170685 South_Bounding_Coordinate: 60.159239 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: DGGS Theme_Keyword: Bathymetry Theme_Keyword: Channel Theme_Keyword: Coastal Theme_Keyword: Coastal Erosion Theme_Keyword: Coastal and River Theme_Keyword: DGGS Theme_Keyword: Drainage Patterns Theme_Keyword: Engineering Theme_Keyword: Engineering Geology Theme_Keyword: Environment Theme_Keyword: Environmental Theme_Keyword: Erosion Theme_Keyword: Flood Theme_Keyword: Geologic Theme_Keyword: Geologic Hazards Theme_Keyword: Geological Process Theme_Keyword: Geology Theme_Keyword: Geomorphology Theme_Keyword: Hazards Theme_Keyword: Instrumentation Theme_Keyword: River Erosion Theme_Keyword: Surface Theme_Keyword: Surface Water Theme_Keyword: Water Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Chefornak Place_Keyword: Kinia River Place_Keyword: Southwest Alaska Access_Constraints: This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Use_Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Data_Set_Credit: We thank the Native Village and City of Chefornak for supporting the creation of these data products, made possible with National Fish and Wildlife Foundation's National Coastal Resilience Funding through our partners at the Alaska Native Tribal Health Consortium. The views and conclusions contained in this docu-ment are those of the authors and should not be interpreted as representing the opinions or policies of the Alaska Division of Geological & Geophysical Surveys, the U.S. Government, the National Fish and Wildlife Foundation, or the National Fish and Wildlife Foundation's funding sources. Mention of trade names or commercial products does not constitute endorsement by the Alaska Division of Geological & Geophysical Surveys, the U.S. Government, the National Fish and Wildlife Foundation, or the National Fish and Wildlife Foundation's funding sources. Cross_Reference: Citation_Information: Originator: Buzard, R.M. Originator: Overbeck, J.R. Originator: Turner, M.M. Originator: Christian, J.E. Publication_Date: 2022 Title: Coastal flood impact assessments for Alaska communities: Kotlik Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2021-1C Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 57 p Online_Linkage: https://doi.org/10.14509/30783 Cross_Reference: Citation_Information: Originator: Overbeck, J.R. Originator: Buzard, R.M. Originator: Turner, M.M. Originator: Miller, K.Y. Originator: Glenn, R.J. Publication_Date: 2020 Title: Shoreline change at Alaska coastal communities Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2020-10 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 29 p., 47 sheets Online_Linkage: https://doi.org/10.14509/30552 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The use of the IHO minimum bathymetric standards (IHO, 2022) would be inappropriate for assessment of these data, which do not meet the IHO prescribed systematic survey pattern criteria. To avoid misinterpretation, DGGS has developed order of accuracy criteria for the qualification of bathymetric survey data separate from but based on the IHO standards. The reported accuracy of these data is intended to express quality only and should not be considered sufficient for safe navigation. Logical_Consistency_Report: Not applicable Completeness_Report: This data releaase is complete. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: We quantified the horizontal accuracy using methods described in the accompanying report. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: We quantified the vertical accuracy using methods described in the accompanying report. Lineage: Process_Step: Process_Description: Field collection - DGGS used an M2Ocean Hydroball bathymetric sensor, composed of an Imagenex 852 single-beam echosounder (SBES), a Tallysman TW3972 GNSS antenna, and a Honeywell HMR3000 inclinometer to col-lect field data. On August 17, 2022, DGGS temporarily installed a Trimble R10 receiver sampling at 5 Hz as a GNSS base station over known benchmark 946 6084 D with a published solution available from https://www.ngs.noaa.gov/OPUS/getDatasheet.jsp?PID=BBHK19&ts=21202103238. Base station data were used to correct the HydroBall sensor positions. To provide water level corrections, DGGS collected derived water level time series data from a temporarily installed Solinst model 3001 Levelogger Edge LT M10/F30 pressure and temperature sensor fully submerged approximately 20 m offshore, and at the Kipnuk Airport Automated Surface/Weather Observing System (ASOS/AWOS) station PAKI located approximately 28 km to the southeast. Process_Date: 20220817 Process_Step: Process_Description: Survey setails - The bathymetric survey was performed on August 17 from 3:30 PM to 6:30 PM AKDT. The weather throughout the survey was mostly cloudy, with light wind and wave heights under 0.3 m. The Hydroball was attached to a catamaran configuration and towed behind a small boat equipped with an outboard motor at speeds below 4 knots. The Imagenex 852 SBES was configured with a maximum range of 20 m, gain of 5 dB, and pulse length of 120 microseconds. Due to time and vessel constraints, the bathymetric survey was per-formed using a survey pattern inconsistent with the requirements outlined in the IHO standards (IHO, 2022). Approximately 10.0 km of riverine bathymetry were surveyed. Process_Date: 20220817 Process_Step: Process_Description: Data processing - Data were processed using methods described in the accompanying report. Process_Date: 2022 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 3 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -165 Latitude_of_Projection_Origin: 0 False_Easting: 500000.000000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: .00000001 Ordinate_Resolution: .00000001 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: NAD83 (2011) Ellipsoid_Name: GRS 80 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257222101 Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: NAVD88, GEOID12B Depth_Resolution: 0.08 Depth_Distance_Units: meters Depth_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: rdf2023-11-bathymetric-data.csv, rdf2023-11-bathymetric-data-dictionary.csv Entity_Type_Definition: Bathymetric sounding data delivered in comma delimited (CSV) format with column headers and accompanied by a data dictionary detailing the header names, definitions, and applicable units. Entity_Type_Definition_Source: DGGS Entity_Attribute_Layer_Name: bathymetry Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Resource_Description: RDF 2023-11 Distribution_Liability: The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. Standard_Order_Process: Non-digital_Form: DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount. Fees: Contact DGGS for current pricing Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: csv Format_Version_Date: 20230717 Format_Information_Content: bathymetry Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.14509/31009 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20230717 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Person: Simone Montayne Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Use_Constraints: If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys. Metadata_Extensions: Online_Linkage: https://dggs.alaska.gov/metadata/dggs.ext Profile_Name: dggs metadata extensions