Tags
Depth of inundation (amount of water above ground surface) in meters in the evacuation zone.
This raster shows the maximum tsunami flow depths estimated for a maximum-considered XXL1 tsunami caused by a magnitude 9.1 Cascadia Subduction Zone (CSZ) earthquake.
We evaluated pedestrian evacuation in the Nehalem Bay area of Tillamook County, Oregon in the event of a local tsunami generated by an earthquake on the Cascadia subduction zone (CSZ). Our analyses focused on a maximum-considered CSZ tsunami event covering 100% of potential variability, termed XXL1 and generated by a magnitude 9.1 earthquake. This raster shows the maximum tsunami flow depths estimated for a maximum-considered XXL1 tsunami. Data are from DOGAMI Open-File Report O-13-17. Flow depths were not directly incorporated into the evacuation difficulty analysis but are included in this report to assist in the evaluation of mitigation options. See the text from this Open-file Report O-20-07 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.
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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 https://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. NA18NWS4670076.
Raster values were checked (cellsize and raster statistics including min, max and mean) using automated QAQC tools designed specifically for tsunami data. Raster values were also reviewed visually in ArcGIS.
Raster values were checked (cellsize and raster statistics including min, max and mean) using automated QAQC tools designed specifically for tsunami data. Raster values were also reviewed visually in ArcGIS.
This raster provides maximum tsunami flow depths estimated for a maximum-considered XXL1 tsunami caused by a magnitude 9.1 Cascadia Subduction Zone (CSZ) earthquake for the Nehalem Bay area of Tillamook County, Oregon. This is defined as the area from Neakahnie Beach in the north down to mouth of the Nehalem River in the south. To the east it extends slightly upstream of the MacDonald Dike Rd bridge on the North Fork of the Nehalem River, and slightly upstream of the Highway 53 bridge on the Nehalem River.
Raster derived from unstructured grid nodes with average spacing of 4-5 meters on land. Interpolated using Natural Neighbor with a cell size of 20 feet (X and Y).
Vertical accuracy is good. Raster values were derived from hydrodynamic tsunami modeling as described in Priest et al, 2013a.
Using Esri ArcGIS 10.7 and Esri ArcPro 2.5 software the raster was derived from unstructured grid nodes with average spacing of ~5-7 meters (~16-23 ft). Interpolated using Natural Neighbor with a cell size of 20 feet (X and Y). Most of the methodology for this process was described in Priest et al, 2013a and Priest et al 2013b. Tsunami evacuation modeling processes are described in Priest et al, 2016 and Gabel et al, 2018b. See the text from this open-file report for technical information on mapping methods.
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 https://www.oregongeology.org
This raster shows the maximum tsunami flow depths estimated for a maximum-considered XXL1 tsunami caused by a magnitude 9.1 Cascadia Subduction Zone (CSZ) earthquake.
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 https://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 https://www.oregongeology.org