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The range of minimum speeds (in feet per second, fps) needed to reach safety from each point in the evacuation zone. Evacuation speeds are collected into seven bins for easier interpretation on a map. They capture the natural boundaries between pedestrian speeds based on model of locomotion and the speed group most applicable to each bin: slow walking at 0-2 fps, walking at 2-4 fps (considered a maximum walking speed for elderly and impaired adults), and fast walking at 4-6 fps (considered a maximum walking speed for unimpaired adults). Additional categories describe areas where walking is not sufficient: jogging at 6-8 fps for fit adults, running at 8-10 fps, sprinting at 10-15 fps (10 mph), and unlikely to survive at greater than 15 fps (10 mph).
Oregon Department of Geology and Mineral Industries
This polygon feature class shows minimum evacuation speeds, in feet per second, needed to stay ahead of the wave assuming all non-retrofitted bridges within the inundation zone fail due to earthquake shaking. This feature class contains data on paved roads. A separate feature class contains data for trails and beach networks.
We evaluated pedestrian evacuation in Cannon Beach, Arch Cape and Falcon Cove, Clatsop County, Oregon in the event of a local tsunami generated by an earthquake on the Cascadia Subduction Zone (CSZ). This polygon feature class shows minimum evacuation speeds, in feet per second, needed to stay ahead of the wave assuming all non-retrofitted bridges within the inundation zone fail due to earthquake shaking. This feature class contains data on paved roads. A separate feature class contains data for trails and beach networks. This layer was created based on the Extra-extra-large1 (XXL1) tsunami scenario, which is a Local Cascadia Subduction Zone (CSZ) tsunami scenario generated by a magnitude 9.1 earthquake. The XXL1 event has an estimated recurrence rate of at least 10,000 years. See the text from this Open-file Report O-22-02 for technical information on mapping methods and a discussion of results and interpretation.
The purpose of this data is to provide local government with a quantitative assessment of pedestrian evacuation in order to evaluate mitigation options such as evacuation route improvements, better wayfinding, land use planning actions, and potential vertical evacuation options.
None
REPORT DATA: This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information. This publication cannot substitute for site-specific investigations by qualified practitioners. Site-specific data may give results that differ from the results shown in the publication. See the accompanying text report for more details on the limitations of the methods and data used to prepare this publication.
When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from http://www.oregongeology.org
This project was funded by the National Oceanic and Atmospheric Administration (NOAA) through the National Tsunami Hazard Mitigation Program under award No. NA20NWS467006.
Statistics of all numeric attributes were generated and reviewed. Unique values and duplicate values for all text attributes were generated and reviewed. Any instances of NULL values or empty values were identified and reviewed for all attributes. Attributes were also reviewed visually in ArcMap.
Statistics of all numeric attributes were generated and reviewed. Unique values and duplicate values for all text attributes were generated and reviewed. Any instances of NULL values or empty values were identified and reviewed for all attributes. The coordinate system, bounding coordinate extent values, and all attribute field names were reviewed. Applicable topology checks were performed.
This dataset is complete for Cannon Beach, Arch Cape and Falcon Cove, Clatsop County, Oregon.
Horizontal positional accuracy is very good because most roads and trails have 1) either been digitized based on lidar or 2) have been checked for accuracy against lidar. For legibility of the evacuation modeling data, road networks used for Beat the wave (BTW) analyses are emphasized by extending the width 12 feet from the road edge; thus, road ends appear to have a 12 foot extension that does not actually exist. Tsunami simulations use unstructured computational grids constructed from detailed bathymetric and topographic data, particularly lidar. Spacing between computational grid points, a measure of the precision of this data, is generally less than 10 m in populated areas and at critical shoreline features such as jetties.
This is Not Applicable.
The path distance tool uses geospatial algorithms to calculate the most efficient route from each point in the evacuation zone to safety. Inputs include sub-sampled lidar and a road and trail network. Additional ArcGIS tools used to convert path distance results into this feature class include several from the Hydrology Toolbox and the backlink raster. This layer was generated using Esri ArcGIS 10.7 and Esri ArcPro 2.8 software.
When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from http://www.oregongeology.org
This polygon feature class shows minimum evacuation speeds, in feet per second, needed to stay ahead of the wave assuming all non-retrofitted bridges within the inundation zone fail due to earthquake shaking. This feature class contains data on paved roads. A separate feature class contains data for trails and beach networks.
When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from http://www.oregongeology.org
Although these data have been processed successfully on a computer system at the Oregon Department of Geology and Mineral Industries, no warranty expressed or implied is made by DOGAMI regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty.
When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from http://www.oregongeology.org