20260323
11584800
1.0
FALSE
Subbasins
002
-
-
Geographic
GCS_WGS_1984
Angular Unit: Degree (0.017453)
<GeographicCoordinateSystem xsi:type='typens:GeographicCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.4.0'><WKT>GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG",4326]]</WKT><XOrigin>-400</XOrigin><YOrigin>-400</YOrigin><XYScale>11258999068426.238</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>8.983152841195215e-09</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><LeftLongitude>-180</LeftLongitude><WKID>4326</WKID><LatestWKID>4326</LatestWKID></GeographicCoordinateSystem>
20260223
16074100
20260223
16074100
150000000
5000
dataset
20260223
File Geodatabase Table
Esri ArcGIS 13.3.0.52636
Subbasins
This table contains a list of the subbasins that cover the project area
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="text-decoration:underline;">Subbasin</SPAN><SPAN>: the name of the subbasin</SPAN></P><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></DIV></DIV></DIV>
This data was generated by AtkinsRéalis.
subbasin
<DIV STYLE="text-align:Left;"><P STYLE="font-size:16ptmargin:0 0 11 0;"><SPAN>The FFRA_Index was developed for a 30-county area at 1×1 km resolution to balance computational efficiency and clarity of intent; designed to identify areas warranting outdoor warning sirens, not to site sirens directly.</SPAN></P><P STYLE="font-size:16ptmargin:0 0 11 0;"><SPAN>The FFRA_Index 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 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>
0
EPSG
6.2(3.0.1)
Subbasins
Table
89354
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
SUBBASIN
SUBBASIN
String
49
0
0