Identification_Information: Citation: Citation_Information: Originator: Kinsman, N.E.M. Publication_Date: 2015 Title: Single-beam bathymetry data collected in shallow-water areas near Gambell, Golovin, Hooper Bay, Savoonga, Shishmaref, and Wales, Alaska, 2012-2013 Geospatial_Data_Presentation_Form: report and digital data Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2015-2 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 14 p. Online_Linkage: http://dx.doi.org/10.14509/29348 Description: Abstract: Nearshore bathymetry is a vital link that joins offshore water depths to coastal topography. Seamless water depth information is a critical input parameter for reliable storm surge models, enables the calculation of sediment budgets, and is necessary baseline data for a range of coastal development decisions. Bathymetric data collection capabilities of an active coastal geohazard field program operated by the Alaska Division of Geological & Geophysical Surveys (DGGS) were expanded in 2012. Resultant datasets presented in this report include nearshore bathymetric measurements of critical shallow-water coastal areas in the vicinity of six western Alaska communities: Gambell, Golovin, Hooper Bay, Savoonga, Shishmaref, and Wales. These data are provided in the form of vector shiptracks and processed single-beam sounding point clouds. This work was completed with a low-cost, portable sonar system capable of shallow water measurements in rural settings; the system will be maintained for use or loan by DGGS for data collections of this type for the useful life of the equipment. Purpose: One of the long-recognized gaps in many coastal datasets is water depth directly adjacent to the shoreline. In few places is this more true than in the data-sparse coastal waters of western Alaska. Between the marine depths and onshore elevations lies a critical zone to which traditional ship-based bathymetric surveys do not extend. These areas are best accessed with portable sonar systems attached to small watercraft capable of navigating shallow waters. Nearshore bathymetric data is a vital component to understanding how coastal storms impact landscapes because marine energy is dissipated (wave breaking) and transformed (wave refraction, shoaling) as it moves across this zone in high-energy storm events. Community-scale models of coastal storm impacts, tsunami inundation, and other scenario-based coastal hazard mapping require seamless topographic-bathymetric grids of depths and elevations transitioning from the marine to terrestrial environment. As many communities seek detailed inundation modeling for storm surge preparation and planning purposes, we need to fill gaps in baseline bathymetric data along Alaska's coast. Other uses for nearshore bathymetry include, but are not limited to, expanding our understanding of coastal/inlet dynamics, quantifying alongshore sediment budgets, calibrating bathymetric mapping with remote sensing platforms, monitoring nearshore benthic environments. Supplemental_Information: This digital data distribution package provides the shiptrack shapefiles and point clouds of the associated single-beam soundings. >shiptracks: Sounding measurement acquisition path for Gambell (GAM) and Savoonga (SVA). >soundings: A point cloud of the single-beam soundings for Gambell (GAM) and Savoonga (SVA). Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2012 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -171.762077 East_Bounding_Coordinate: -171.689758 North_Bounding_Coordinate: 63.796846 South_Bounding_Coordinate: 63.766194 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Bathymetry Theme_Keyword: Coastal Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Bering Sea Place_Keyword: Chukchi Sea Place_Keyword: Gambell Place_Keyword: Golovin Place_Keyword: Hooper Bay Place_Keyword: Hooper Bay Quadrangle Place_Keyword: Saint Lawrence Quadrangle Place_Keyword: Savoonga Place_Keyword: Shishmaref Place_Keyword: Shishmaref Quadrangle Place_Keyword: Solomon Quadrangle Place_Keyword: Teller Quadrangle Place_Keyword: Wales Place_Keyword: Yukon-Kuskokwim Delta Temporal: Temporal_Keyword_Thesaurus: Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America Temporal_Keyword: Holocene 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: GIS 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_Electronic_Mail_Address: dggsgis@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Data_Set_Credit: In addition to support from the Western Alaska Landscape Conservation Cooperative (WALCC), this project received funding from qualified outer continental shelf oil and gas revenues through the Coastal Impact Assistance Program, U.S. Fish and Wildlife Service, U.S. Department of the Interior. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the Western Alaska Landscape Conservation Cooperative or the U.S. Government. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Government. Special thanks are extended to our partners at the Alaska Ocean Observing System (AOOS) and to the local residents who worked with us in each community. DGGS staff and interns that participated in the collection and processing of this data include: Meagan DeRaps, Alexander Gould, Jacquelyn Overbeck (nee Smith), and Lauren Southerland. Local boat operators include: Jack Fagerstrom, Golovin; Jimmy Seetomona, Shishmaref; Amos Oxereok, Wales; Eddie Ungott, Gambell; Dylan Iya and Bryan Rookok, Jr., Savoonga; and James Hale and Rudy Smith, Hooper Bay. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: An accuracy assessment was conducted on each included dataset for quality assurance purposes. See table 2 in the accompanying report for methods and discussion of the full results. Logical_Consistency_Report: Not applicable Completeness_Report: Not applicable Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal uncertainty varies by community. See table 2 in the accompanying report for methods and discussion of the full results. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Vertical uncertainty varies by community. See table 2 in the accompanying report for methods and discussion of the full results. Lineage: Process_Step: Process_Description: Bathymetry survey - DGGS coastal hazards field crew spent one to three days collecting nearshore bathymetric measurements in areas adjacent to existing or proposed coastal development. Shiptracks were designed to be perpendicular to the shore, spaced at an interval appropriate to the opportunistic survey window, and aligned with onshore coastal elevation measurements, when available. Additional depth readings were focused on the mouths of inlets and in tidally-influenced lagoons, river mouths, or estuaries adjacent to developed areas. Water depths were measured from a small watercraft using an Ohmex SonarMite transducer with associated accessories and software consistent with the widely-used 'Hydrolite' System from Seafloor Systems. The echosounder has a 200 KHz frequency, 4 degree beam width, and a ping rate of 6 Hertz. This equipment was combined with a Topcon DGPS receiver, external antenna, and field controller. Some minor changes were made to the purchased system to make it more appropriate for fieldwork in Alaska; these included transom-mount modifications, replacement of the aluminum pole mount with a steel pole, and extended cables to keep the equipment away from saltwater regardless of what type of boat was used for the survey. Bathymetric survey equipment was fitted to boats available on site. Local boat operators were hired to pilot the sensor platforms, allowing our team to benefit from extensive local knowledge of coastal waters, ensure that planned tracks were feasible with the available boat, and maximize the inclusion of known bathymetric features of importance (for example, persistent sandbars). Process_Date: 2014 Process_Step: Process_Description: Post-survey processing - We conducted post-survey processing to correct for sensor position and assess final measurement accuracy. The steps involved in the data collection and post-processing workflow are illustrated in the accompanying report. Process_Date: 2014 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: 2 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -171 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: .01 Ordinate_Resolution: .01 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: GRS 80 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257222101 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: NAVD88(GEOID12A) Altitude_Resolution: 0.01 Altitude_Distance_Units: Meters Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: rdf2015-2-GAM_shiptracks.shp, rdf2015-2-SVA_shiptracks.shp Entity_Type_Definition: Sounding measurement acquisition path for Gambell (GAM) and Savoonga (SVA). Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: shiptracks Attribute: Attribute_Label: Name Attribute_Definition: Sounding Group Attribute_Definition_Source: Accompanying report, table 2 Attribute_Domain_Values: Unrepresentable_Domain: Sounding groups names are a concatenation of the community code and a group number. Group numbers were assigned sequentially based on the order of data collection. Detailed_Description: Entity_Type: Entity_Type_Label: rdf2015-2-GAM_soundings.shp, rdf2015-2-SVA_soundings.shp Entity_Type_Definition: A point cloud of the single-beam soundings for Gambell (GAM) and Savoonga (SVA). Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: soundings Attribute: Attribute_Label: POINT_X Attribute_Definition: Easting coordinate (meters) Attribute_Definition_Source: this report Attribute_Domain_Values: Unrepresentable_Domain: UTM Zone 2 Attribute: Attribute_Label: POINT_Y Attribute_Definition: Northing coordinate (meters) Attribute_Definition_Source: this report Attribute_Domain_Values: Unrepresentable_Domain: UTM Zone 2 Attribute: Attribute_Label: POINT_Z Attribute_Definition: depth (meters) Attribute_Definition_Source: this report Attribute_Domain_Values: Unrepresentable_Domain: NAVD88 (GEOID12A) Attribute: Attribute_Label: Date Attribute_Definition: Date the measurements were collected Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) Attribute_Domain_Values: Unrepresentable_Domain: Bathymetric measurements collected in the 2012 or 2013 summer field seasons. Attribute: Attribute_Label: Shiptrack Attribute_Definition: Sounding group name Attribute_Definition_Source: Accompanying report, table 2 Attribute_Domain_Values: Unrepresentable_Domain: Sounding groups names are a concatenation of the community code and a group number. Group numbers were assigned sequentially based on the order of data collection. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys 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 (http://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 2015-2 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: Shapefile Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.14509/29348 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20150327 Metadata_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 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: http://www.dggs.alaska.gov/metadata/dggs.ext Profile_Name: dggs metadata extensions