Tags
The Flow_zone attribute provides an identification number for each evacuation flow zone. The actual value is arbitrary; the intention is to allow a user to differentiate flow zones in order to more clearly see the larger evacuation regime for a region. Flow_zone IDs link with the corresponding Evacuation Route feature class Flow_zone IDs.
Oregon Department of Geology and Mineral Industries
The time, in seconds, after the Cascadia Subduction Zone earthquake when the first wave reaches the point of safety for each evacuation flow zone. The first wave arrival is defined as the time at which tsunami flow depth reaches more than 0.5 ft. See the text from this open-file report for a discussion of tsunami wave arrival data and a complete map of wave arrival times for the region.
Oregon Department of Geology and Mineral Industries
The wave arrival time, in seconds, for each evacuation zone minus 10 minutes to account for the time in which earthquake shaking takes place, as well as human disorientation, and the time required to evacuate buildings. It is these values that were used to calculate Beat the wave (BTW) evacuation speeds. See the text from this open-file report for a discussion of evacuation delay.
Oregon Department of Geology and Mineral Industries
This polygon feature class shows the nearest safety destination for every point in the inundation zone (on the road and trail network) assuming all non-retrofitted bridges within the inundation zone fail due to earthquake shaking.
We evaluated pedestrian evacuation in Gold Beach and nearby unincorporated communities of Curry County, Oregon in the event of a local tsunami generated by an earthquake on the Cascadia subduction zone (CSZ). This polygon feature class shows the nearest safety destination for every point in the inundation zone (on the road and trail network) assuming all non-retrofitted bridges within the inundation zone fail due to earthquake shaking. This layer was created based on the Large1 (L1) tsunami scenario, which is a Local Cascadia Subduction Zone (CSZ) tsunami scenario generated by a magnitude 9.0 earthquake. The L1 event has an estimated recurrence rate of 2,500 to 3,333 years. See the text from this Open-file Report O-21-03 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. NA19NWS4670013.
All feature class attributes were checked using automated python review tools designed specifically for tsunami evacuation data. Attributes were also reviewed visually in ArcGIS.
This layer was visually reviewed in ArcGIS. The following topology checks were performed and any errors were resolved: Must Be Single Part and Must Not Overlap.
This dataset is complete for Gold Beach and nearby unincorporated communities of Curry County, Oregon. This is defined as the area from Ophir in the north down to and including Hunter Creek in the south. To the east it extends up the Rogue River as far as the Canfield Riffle.
Horizontal positional accuracy is very good because evacuation flow zones are derived from path distance results. 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 2.7 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 the nearest safety destination for every point in the inundation zone (on the road and trail network) assuming all non-retrofitted bridges within the inundation zone fail due to earthquake shaking.
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