{"action":"create","ckan_id":null,"date_created":"Sat, 14 Mar 2026 20:50:50 GMT","date_finished":null,"harvest_job_id":"786d63f7-35e6-48b2-9891-4b440725eb67","harvest_source_id":"31f41541-38a0-400b-b240-10ebcb0acd9a","id":"71af848e-a5ba-4a2a-87b5-79bb177b50bd","identifier":"https://dggs.alaska.gov/webpubs/metadata/RI2014-1B.xml","parent_identifier":null,"source_hash":"c4569cdb2d4231ba9263c4411efd155f04ab3d75f9ffb79310da40705fe15798","source_raw":"Suleimani, E.N.Nicolsky, D.J.Salisbury, J.B.2022Updated tsunami inundation maps for Cordova, Alaskareport, dataReport of InvestigationRI 2014-1BFairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys26 p., 6 sheetshttps://doi.org/10.14509/30868Report of Investigation 2014-1B, Updated tsunami inundation maps for Cordova, Alaska, updates the previous tsunami hazard assessment for Cordova, Alaska, by Nicolsky and others (2014). We numerically remodel the extent of potential inundation from tsunami waves using a new, more accurate digital elevation model (DEM) that covers areas in the Copper River delta adjacent to the Cordova Municipal Airport. Results presented here are intended to provide guidance to local emergency management agencies for tsunami inundation assessment, evacuation planning, and public education to mitigate future tsunami damage. The complete report and digital data are available from the DGGS website: http://doi.org/10.14509/30868.DGGS manages the DNR portion of the federally funded National Tsunami Hazard Mitigation Program (NTHMP). The program identifies at-risk coastal Alaska communities and provides tsunami hazard maps for hazard mitigation and emergency response training.>max-flow-depth: Raster image depicting maximum composite flow depths over dry land. For each grid point, the pixel value provides the modeled depth of water (in meters) over previously dry land, representing the maximum depth value of all calculated tsunami scenarios.\t\r\n>max-inundation: Estimated, \"maximum credible scenario\" inundation line(s) that encompasses the maximum extent of flooding based on model simulation of all credible source scenarios and historical observations. The maximum credible scenario inundation lines are intended to be utilized as a basis for local tsunami hazard planning and development of evacuation maps.2022publication datecompleteNone planned-146.138138-145.35406860.70518760.397484ISO 19115 Topic CategorygeoscientificInformationAlaska Division of Geological & Geophysical SurveysActive FaultBathymetryCoastalCoastal and RiverCoastal and River HazardsDGGSDigital Elevation ModelEarthquakeEarthquake Related HazardsEarthquake Related Slope FailureEmergency PreparednessEngineeringEngineering GeologyEnvironmentalFaultingFaultsFloodGeologicGeologic CommunicationsGeologic HazardsGeological ProcessGeologyGeomorphologyGeophysicsGeotechnicalHazardsInundationLand SubsidenceLandslideMarine GeologyModelingSeismic HazardsSeismologySlopeSlope InstabilitySlope Instability HazardsSubsidenceSubsurfaceSurfaceSurface Fault RuptureSurface WaterSurficialSurficial GeologyTectonicsTidesTsunamiAlaska Division of Geological & Geophysical SurveysAlice CoveBig PointBluff PointBomb PointBoswell BayBoulder CreekBoy Scout IslandCanoe CreekCanoe PassageCanyon CreekCedar BayCedar CreekChannel IslandsCity of CordovaCordovaCrater LakeCrystal FallsDeep BayDeep CreekEccles CreekEccles LagoonEvakEyak LakeEyak RiverFleming CreekFleming SpitFox PointGlacier RiverGrass IslandGravel PointGulf of AlaskaHanks IslandHartney BayHartney CreekHawkins IslandHemlock CreekHeney CreekHeney PeakHeney RangeHidden CoveHidden CreekHumpback CreekIbeck CreekKenny CoveKnot PointKoppen CreekMeals LakeMeals Lake DamMilton LakeMount EcclesMount EyakMount Robert KornMount ShielsMud BayMummy IslandNelson BayNicolet CreekNorth IslandObservation IslandOdiak ChannelOdiak LagoonOrca BayOrca ChannelOrca CreekOrca InletPacific OceanParson Falls CreekPaul CreekPoint WhitshedRaging CreekRobinson Falls CreekRogue CreekRude RiverSaddle PointSahlin CreekSahlin FallsSahlin LagoonSalmo PointScout LakeSheep BaySheep PointSheep RiverShepard PointShipyard BayShirttail PointSimpson BaySimpson CreekSnyder Falls CreekSnyder MountainSpike IslandSpruce CreekStrawberry HillThe NarrowsThree Mile BayTripod HillWesley Falls CreekWestern ChannelWhiskey CoveWindy BayWindy CreekThis 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).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.Alaska Division of Geological & Geophysical SurveysMetadata Managermailing and physical
3354 College Road
FairbanksAK99709-3707USA(907)451-5020(907)451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysPlease 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.This report was funded by the Department of Commerce/National Oceanic at Atmospheric Administration through the National Tsunami Hazard Mitigation Program (NTHMP), Award #NA21NWS4670003 to the Alaska Division of Homeland Security & Emergency Management. This does not constitute an endorsement by NOAA. Numerical calculations for this work were supported by High Performance Computing (HPC) resources at the Research Computing Systems unit at the Geophysical Institute, University of Alaska FairbanksNewell, J.T.Maurits, S.A.Suleimani, E.N.Koehler, R.D.Nicolsky, D.J.2015Tsunami inundation maps for Alaska communitiesDigital Data SeriesDDS 10Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveyshttps://doi.org/10.14509/29523Salisbury, J.B.Janssen, K.A.2022Tsunamis in AlaskaInformation CircularIC 85 v. 2Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 phttps://doi.org/10.14509/30849The maps showing the results of our modeling have been completed using the best information available and are believed to be accurate, however, their preparation required many assumptions. We described several scenarios and provide an estimate of maximum credible tsunami inundation. Actual conditions during a tsunami event may vary from those considered, so the accuracy cannot be guaranteed. The limits of inundation shown should be used only as a guideline for emergency planning and response action. Actual areas inundated will depend on specifics of the earth deformations, on-land construction, and tide level, and they may differ from areas shown on the map. The information on this map is intended to provide a basis for state and local agencies to plan emergency evacuation and tsunami response actions in the event of a major tsunamigenic earthquake. These results are not intended for land-use regulation or building-code development. This DGGS Report of Investigations is a final report of scientific research. Several scientists familiar with the subject matter provided technical reviews. Uncertainties associated with the depiction or interpretation of various features are discussed in the manuscript.Not applicableThe results of our modeling have been completed using the best information available and are believed to be accurate; however, their preparation required many assumptions and actual conditions during a tsunami event may vary from those considered.The hydrodynamic model used to calculate propagation and runup of tsunami waves is a nonlinear, flux-formulated, shallow-water model that has passed the validation and verification tests required for models used in production of tsunami inundation maps. The uncertainties in tsunami modeling include bottom friction, presence or absence of buildings and vegetation in DEMs, the time delay between the observed and computed tsunami arrivals discussed above, the lack of horizontal deformation in the displacement models, and assumption of instantaneous displacement. The tsunami scenarios that we calculate in this report are considered to be sufficient to capture the worst-case tsunami event, but there are still an infinite number of possible slip distributions. Further details about the limitations of the employed modeling approach are described in earlier reports by Suleimani and others and Nicolsky and others, as well as in National Tsunami Hazard Mitigation Program guidelines. See accompanying report for more detail.The vertical accuracy of the inundation modeling is dependent on the accuracy and resolution of the digital elevation models (DEMs) and tidal datum values that were used to compile the computational grid. We provide additional details about DEM and grid development in the accompanying report. Prior to scenario modeling, bathymetric data were shifted to use Mean Higher High Water (MHHW) as the vertical datum. The depths of inundation shown should be used only as a guideline for emergency planning and response action. Actual inundation water depth will depend on specifics of the earth deformations, on-land construction, and tide level, and they may differ from areas shown by this data. The information is intended to permit state and local agencies to plan emergency evacuation and tsunami response actions in the event of a major tsunamigenic earthquake. These results are not intended for land-use regulation or building-code development. For additional information please reference the sources of errors and uncertainties section of the associated manuscript.Model validation - The numerical model that we used for simulation of tsunami wave propagation and runup was validated through a set of analytical benchmarks and tested against laboratory data. The model solves water equations using a finite-difference method on a staggered grid. See the accompanying report for more detail and additional model information.2014Development of nested grids - To support inundation modeling of coastal areas in Alaska, we used a series of nested telescoping grids, or digital elevation models (DEMs), as input layers for tsunami inundation modeling and mapping. These grids of increasing resolution allowed us to propagate waves generated by various sources to Cordova. In order to propagate a wave from its source to various coastal locations, we used embedded grids, placing a large, coarse grid in deep water and coupling it with smaller, finer grids in shallow water areas. The extent of each grid used for our tsunami inundation mapping is listed in the accompanying report.2020Numerical simulations of hypothetical tsunami scenarios - We assessed hazards related to tectonic tsunamis in Cordova by performing model simulations for each hypothetical source scenario. For each tsunami scenario, we first calculate the maximum tsunami wave heights in the highest-resolution grid over the course of the entire model run in the following way: at each grid point, the tsunami wave height is computed at every time step during the tsunami propagation time and the maximum value is kept. Then we compute the composite maximum tsunami wave height from all considered scenarios by again choosing the maximum value for each grid point among all scenarios, and plot the results.2022vector.000001.000001decimal degreesWGS84WGS 846378137298.257223563Mean Higher High Water.01meterAttribute valuesri2014-1b-max-flow-depth.tifRaster image depicting maximum composite flow depths over dry land. For each grid point, the pixel value provides the modeled depth of water (in meters) over previously dry land, representing the maximum depth value of all calculated tsunami scenarios. File format: GeoTIFFAlaska Earthquake Center, Geophysical Institute, University of Alaska, this reportmax-flow-depthri2014-1b-max-inundation.shpEstimated, \"maximum credible scenario\" inundation line(s) that encompasses the maximum extent of flooding based on model simulation of all credible source scenarios and historical observations. The maximum credible scenario inundation lines are intended to be utilized as a basis for local tsunami hazard planning and development of evacuation maps. File format: shapefileAlaska Earthquake Center, Geophysical Institute, University of Alaska, this reportmax-inundationAlaska Division of Geological & Geophysical SurveysMetadata Managermailing and physical
3354 College Road
FairbanksAK99709-3707USA(907)451-5020(907)451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysPlease 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.RI 2014-1BThe 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.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.Contact DGGS for current pricingShapefiles and Raster datahttps://doi.org/10.14509/30868Free download20220802Alaska Division of Geological & Geophysical SurveysSimone MontayneMetadata Managermailing and physical
3354 College Road
FairbanksAK99709-3707USA(907)451-5020(907)451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysFGDC Content Standard for Digital Geospatial MetadataFGDC-STD-001-1998If 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.https://dggs.alaska.gov/metadata/dggs.extdggs metadata extensions","source_transform":null,"status":"error"}