Kinsman, N.E.M., and DeRaps, M.R., 2012, Coastal hazard field investigations in response to the November 2011 Bering Sea storm, Norton Sound, Alaska: Report of Investigation RI 2012-2 v. 1.1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.Online Links:
This is a vector data set.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.000001
Ordinates (y-coordinates) are specified to the nearest 0.000001
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is North American Datum of 1983.
The semi-major axis of the ellipsoid used is 6378137.
The flattening of the ellipsoid used is 1/298.257222101.
Comment explaining the location of flood water relative to the line
This RDF is funded with qualified outer continental shelf oil and gas revenues by the Coastal Impact Assistance Program, U.S. Fish and Wildlife Service, and 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 U.S. Government. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Government. A draft version of this work was reviewed by Golovin community members for accuracy and to resolve gaps in observed inundation extents as well as discrepancies between 2004 DCCED elevations and present-day conditions. The DGGS team would like to extend their deepest gratitude to all of the community members who took the time to share their videos, photographs, and observations and to those who provided the feedback that improved this map.
(907)451-5029 (voice)
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The purpose of this shapefile is to show the extent of the November 9, 2011 flooding in Golovin, AK.
Alaska Department of Commerce, Community and Economic Development, and Kawarak-Incorporated, 2004, Golovin Community Map, Sheet 1.Online Links:
Data sources used in this process:
DeRaps, M.R., and Kinsman, N.E.M., 2012, Spatially referenced oblique aerial photography of the Eastern Norton Sound shoreline, July 2011: Raw Data File RDF 2011-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.Online Links:
DeRaps, M.R., and Kinsman, N.E.M., 2012, Spatially referenced oblique aerial photography of the Golovin shoreline, July 2012: Raw Data File RDF 2012-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.Online Links:
Gray, Glenn, Smith, J.R., and Kinsman, N.E.M., 2012, Annotated bibliography series in support of coastal community hazard planning-Northwest Alaska; Chapter R, Shaktoolik: Miscellaneous Publication MP 147R, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.Online Links:
Sallenger, A.H., Jr., 1983, Measurements of debris-line elevations and beach profiles following a major storm; northern Bering Sea coast of Alaska: Open-File Report OF 83-394, U.S. Geological Survey, Fairbanks, AK, USA.Online Links:
Smith, J.R., Gray, Glenn, and Kinsman, N.E.M., 2012, Annotated bibliography series in support of coastal community hazard planning-Northwest Alaska: Miscellaneous Publication MP 147, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.Online Links:
Smith, J.R., and Kinsman, N.E.M., 2012, Annotated bibliography series in support of coastal community hazard planning-Northwest Alaska; Chapter E, Golovin: Miscellaneous Publication MP 147E, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.Online Links:
Smith, J.R., and Kinsman, N.E.M., 2012, Annotated bibliography series in support of coastal community hazard planning-Northwest Alaska; Chapter U, Unalakleet: Miscellaneous Publication MP 147U, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.Online Links:
Certainty in placement of the inundation limit line is dependent on accurate identification of flood indicators in the field; these included the measurement of debris lines, water and slush limits in the snow, and elevations of visibly overtopped or inundated areas. Each measured flood indicator was assigned a qualitative confidence level to reflect the validity of inferring marine flood levels from the measurement. High confidence was applied to locations where evidence of a discrete water level was readily observed in the field (slush lines, for example). Medium confidence was applied to points that were measured at the best approximation of the water position based on partially obscured or indiscrete evidence (tension cracks in snow or many of the photo-identified points, for example). Lowest confidence was applied to points where the role of floodwater in the creation of a flood indicator was ambiguous, where locations were identified solely from the memories of residents, or where clean-up activities had modified the site enough to conceal the exact location of the flood extent. The elevation of the measured flood indicators as well as associated confidence levels are outlined in a table on Sheet 1 of the accompanying report.
The inundation limit line has a horizontal positional accuracy dependent on: 1) The error associated with the 32 field measurements of flood indicators. Measurements were obtained using a Topcon survey grade GPS, horizontal precision values were calculated using Topcon office software to be less than 10 cm. 2) The error associated with the position and elevation of contours on the DCCED community map. The DCCED map accuracy is reported as meeting National Cartographic Mapping Standards (90% of defined horizontal points are accurate to within 2 feet, 90% of elevations are accurate to within 1 foot).
Due to the morphology of the Golovin coastline, which shelters the community from direct wave attack, the paucity of runup limit indicators and the short amount of time available in the field, the flood inundation limit line does not extend to the exposed (Golovin Bay) side of the community. However, reported accounts from several residents indicated that a protective band of slush helped to reduce the wave energy on the southern side of the community. Our observations supported these accounts because there was no evidence of waves overtopping the crest of the ice ridge along the Golovin Bay coast, except at the very southwestern tip of the peninsula near the old airport. For more information about the location and elevation of the measured flood indicators used to produce this inundation limit line see map sheet 1 of the accompanying report.
not applicable
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- 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.
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RI 2012-2
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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.
| Data format: | vector digital data |
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| Network links: |
<http://dx.doi.org/10.14509/24484> |
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