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This shapefile is a supplemental file to the primary tsunami inundation scenarios released with this publication. The evacuation zones are the local and distant tsunami scenarios shown on the tsunami evacuation brochures which can be found on the Oregon Tsunami Clearinghouse web site: www.oregontsunami.org
The local tsunami evacuation zone is equal to the XXL tsunami scenario. The distant tsunami evacuation zone is equal to the AKMax tsunami scenario. These are the worst case scenarios for a local and distant earthquake/tsunami event. These polygons represent the evacuation zones for the entire Oregon coast.
The wildland-urban interface (WUI) is the area where structures and other human development meet or intermingle with undeveloped wildland, and it is where wildfires have their greatest impacts on people. The WUI is composed of both interface and intermix communities. The distinction between these is based on the characteristics and distribution of houses and wildland vegetation across the landscape. Intermix WUI refers to areas where housing and wildland vegetation intermingle, while interface WUI refers to areas where housing is in the vicinity of a large area of dense wildland vegetation.
In this dataset, the University of Wisconsin's 2010 SILVIS WUI dataset was used as a base WUI. To this, ODF brought in local data from past Community Wildfire Protection Plan (CWPP) and Wildland Urban Interface (WUI) data from all counties in Oregon to capture WUI areas locally designated and/or established after 2010. In addition, the Oregon Department of Land Conservation and Development (DLCD) 2017 Land Use Zoning was also used to attribute some areas that were not attributed as WUI in the 2010 SILVIS WUI dataset. Wildfire hazard values were assigned to each WUI area largely based on Burn Probability from the 2018 PNW Quantitative Wildfire Risk Assessment, modified to accommodate local designations where applicable.
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An ArcGIS symbology layer file is associated with this dataset to show the wildfire hazard ratings as seen in the metadata browse graphic. The attribute field used is "Modified_Rating_QWRA18BP_CWPP."
Other attribute fields that may be useful are:
WUIClass_Modified_Oregon - shows wui class interface and intermix from SILVIS WUI and DLCD zoning where applicable.
WUIClass10 - is the original SILVIS WUI designation as of 2010. Prior WUIClass90 etc may be usful for change detection studies.
OR_WUI_Community - shows locally named community names - sometimes very close neighborhood names are concatenated and could be cleared up in the next update of this dataset.
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Processing steps:
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Gathering the WUI polygon data:
Spatial Joins to the source SILVIS WUI dataset: CWPPs, "Locally Named Communities" (from 2012-2017 WUI & CWPPs), City Limits, Structural Fire Districts, and 5 mile buffer of all Oregon town points to capture very rural towns without City Limits and to capture the towns at risk in the Pyrologix/USFS 2018 PNW QWRA Supplemental Briefing Paper "Exposure of human communities to wildfire in the Pacific Northwest"
http://pyrologix.com/wp-content/uploads/2019/11/RiskToCommunities_OR-WA_BriefingPaper.pdf
Spatial Join with DLCD Oregon 2017 Land Use Zoning.
Deleted all polys from WUI that were not WUI or a Locally Named Comunity, FedRegister, or Land Use zone that appeared to be built-environment. For example, some rural areas had a DLCD residential zoning, or other built environment, etc., but Silvis had it as "Uninhabited_Veg" etc.
Checked with West Wide Wildfire Risk Assessment "Where People Live" data - there was not enough of a difference to further process with WPL to add data in (very low density veg).
Err'd on the side of inclusion - kept many areas that are "Very Low Density Veg," "Very Low Density NoVeg," and "Uninhabited Veg" in the SILVIS WUI due to local community presense and/or DLCD residential or rural built-environment zoning.
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Associated with QWRA to obtain Wildfire Hazard values:
Calculated Zonal Statistics for each poly using "Burn Probability" for hazard ratings to wui polys. Adjusted hazard levels up in cases where local info / National Fire Plan Coordinator informed the hazard levels. Translated burn probability values into 7 adjective classes based on the Pyrologix/QWRA classification, merged down to 3 main classes (low, moderate, high).
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A Community Wildfire Protection Plan (CWPP) is a plan developed by a community in an area with exposure to wildfire. The Community Wildfire Protection Planning process is a collaboration between communities and agencies interested in reducing their susceptibility to wildfire.
A valid CWPP has three minimum requirements. First, the plan must be collaboratively developed by local and state government representatives in consultation with federal agencies and other interested parties. Second, the plan must identify and prioritize areas for hazardous fuel reduction treatments, as well as recommending methods of treatments that will protect at-risk communities and essential infrastructure. Third, the plan must recommend measures that homeowners and communities can take to reduce ignitability of structures throughout the area addressed by the plan.
The Healthy Forest Restoration Act (HFRA) requires that three decision-makers mutually agree to the final contents of the CWPP. The three are the applicable local government (i.e. counties or cities), the local fire department(s) and the State entity responsible for forest management (ODF). These three are directed to consult with and involve local representatives of the USFS and BLM and other interested parties or persons in the development of the CWPP.
The statutory definition of a CWPP appears in Title I of the HFRA. The HRFA decrees that communities, which have a CWPP in place, will be a priority for receiving hazardous fuels reduction funding administrated by the USFS and BLM.
The State Land Inventory (previously known as the Mineral Registry within Dept. of State Lands) layer is the datasets used for DSL's management obligations for State owned subsurface or mineral interests. The State Land Inventory (Mineral Registry) layer contains a representation of property owned by the various State of Oregon agencies and tracks whether the surface and subsurface rights. It does not include information about the extent of subsurface ownership. The originating deed will need to be referenced to ascertain whether there are any reservations or exceptions that effect ownership rights.
The original information was compiled in an INFO relatable table created in WorkStation Arc/Info. This INFO table was populated with mineral rights information along with Subfsurface inforamtion, from DSL staff and numerous college interns. The idea was to use INFO relates from the minreal table back to the subsurface/surface Resource Inventory polygon coverage (Layer). While the idea was good there were many inconsistancies with the data and so in early 1997 R. Sounhein decided to simplyfiy the data.
Premier Data Services from Colorado was hired to help clean up the INFO table and then work with R. Sounhein to create a new single unique minerals/subsufrace polygon dataset. Therefore, DSL now how two simple single polygon layers that could stand on their own. For the future ( => 2017) the mineral dataset will still need to be normalized to the Frst Normal as well as reducing some of the attributes that are not needed. Currently the mineral datasets is used in an online Web Mapping Application called the State Lands Inventory.