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The primary purpose of the flood planning data webpage is to support the regional flood planning groups (RFPG).
The Flood Planning Data Hub is the source for information compiled by the TWDB for the regional flood planning groups. This includes resources from many entities. An index of GIS resources is available on the HUB.
The TWDB generated template GIS geodatabases with multiple feature classes and tables for the RFPGs. Each planning group must fill the template geodatabase with relevant regional flood planning data. Template file geodatabases for each flood planning region can be found under the Geodatabase Templates link in the top blue bar on the Hub. These geodatabases contain feature classes and fields to match the specifications for the RFPGs in Exhibit D: Data Submittal Guidelines for Regional Flood Planning. They are empty except for the Entities feature class which has been populated with entities in the region.
The floodplain quilt is a comprehensive coverage of existing statewide flood hazard information. This is prepared by TWDB to provide the RFPGs with a common starting point for their own compilation of flood risk data in their regions. The RFPGs are expected to confirm, update, and otherwise enhance the initial floodplain quilt information as appropriate to prepare the deliverables required for their flood risk analyses tasks.
The Floodplain Quilt geodatabase is available for download under Flood Risk on the Hub.
The floodplain quilt is “sewn” together from various sources of data (National Flood Hazard Layer, Base Level Engineering, etc.) to provide one location for all layers. The quilt prioritizes layer types and shows the top layer type available for a particular area. For more information, see the Floodplain Quilt Prioritization overview.
An additional Cursory Floodplain dataset is available for areas not covered by the Quilt.
Buildings with associated population estimates and Social Vulnerability Index are available in both the Property and Population categories on the Hub. Population estimates are based on Landscan Data from Oak Ridge National Laboratory. The RFPGs are expected to confirm, update, and otherwise enhance the building population estimates as appropriate to prepare the deliverables required for their flood risk analyses tasks.
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