20260323
11590400
1.0
FALSE
FFRA_Haz
002
-
-
Geographic
GCS_WGS_1984
Angular Unit: Degree (0.017453)
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20260223
16001400
20260223
16001400
150000000
5000
dataset
20260223
File Geodatabase Table
Esri ArcGIS 13.3.0.52636
FFRA_Haz
This table includes the FFRA index value and Hazard Index value normalized.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="text-decoration:underline;">FFRA_Grid</SPAN><SPAN>: This is a foreign key that relates to the Unique_ID field in the FFRA_Grid table. </SPAN></P><P><SPAN STYLE="text-decoration:underline;">Hazard_Index</SPAN><SPAN>: This field contains the computed hazard index, normalized between 0 and 1, where a value of 1 represents the highest hazard within the study area.</SPAN></P></DIV></DIV></DIV>
This data was generated by AtkinsRéalis, using the campgrounds and parks datasets provided by Texas Water Development Board (TWDB).
FFRA
hazard
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>While the hazard dataset has comprehensive coverage for the 30-county area, the product is tailored specifically to target flash flood-prone areas along rivers, streams, channels, or other waterways that warrant sirens (and may not fully capture localized or pluvial flooding mechanisms).</SPAN></P><P><SPAN>The FFRA is provided for the 30-county area at a spatial resolution of 1-kilometer by 1-kilometer for better computational efficiency as well as to align with input data with the coarsest resolution among those that were used in this study. In addition, the selection of the 1-kilometer by 1-kilometer pixel grid for processing FFRA can avoid confusion about the intent of the product – a finer resolution may give a false impression about the precision or intent of this study. This study is not intended to site sirens as part of outdoor warning siren systems but to identify flash flood-prone areas that warrant sirens. FFRA with a resolution of 1x1 kilometer can adequately serve as foundational information for identifying flash flood-prone areas that warrant sirens given the audible radius for outdoor warning sirens typically ranging from approximately 1 to 2 miles.</SPAN></P></DIV></DIV></DIV>
0
EPSG
6.2(3.0.1)
FFRA_Haz
Table
83551
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
FFRA_Grid
FFRA_Grid
String
100
0
0
Hazard_Index
Hazard_Index
Single
4
0
0