20220404
21373500
1.0
FALSE
Overtopping_12
002
0.000
531449.173500
603154.961400
4138074.504000
4244686.464400
1
Projected
GCS_WGS_1984
Linear Unit: Meter (1.000000)
WGS_1984_Web_Mercator_Auxiliary_Sphere
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20220329
14574700
20220329
14574700
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ISO19139
Esri ArcGIS 12.9.2.32739
BCDC - Road / Rail SLR 1.0 ft (12 in)
BCDC GIS
SF Bay Conservation and Development Commission
gis@bcdc.ca.gov
2017-07-01T00:00:00
1
-122.644726
-121.819556
38.349782
37.383689
The Adapting to Rising Tides program has developed this website to help Bay Area communities prepare for the impacts of current and future flooding due to sea level rise and storm surges by learning about causes of flooding, exploring maps of flood risk along our shoreline, and downloading the data for further analysis. These maps increase understanding of what could be at risk without future planning and adaptation, helping Bay communities, governments, and businesses to drive action.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Adapting to Rising Tides program has developed this website to help Bay Area communities prepare for the impacts of current and future flooding due to sea level rise and storm surges by learning about causes of flooding, exploring maps of flood risk along our shoreline, and downloading the data for further analysis. These maps increase understanding of what could be at risk without future planning and adaptation, helping Bay communities, governments, and businesses to drive action. The Flood Explorer and associated flood maps are intended to be used as a planning guide to understand where our shoreline is at risk from current and future flooding from sea level rise and storms. The maps support adaptation planning by: Showing low points along the shoreline that can lead to inland flooding, enabling resources to be directed to areas that pose the greatest risk. Presenting flooding as a “Total Water Level” above mean higher high water (MHHW), which represents various combinations of storm-surge and sea level rise. In using this approach, the Flood Explorer communicates that some areas will be temporarily flooded before they are permanently inundated and therefore, supports development of early-, mid-, and long-, term thresholds for action. Providing high quality spatial information to support planning given that these high-resolution maps were carefully reviewed by local stakeholders. It is important to note that while the maps depict flooding that would result if water levels were higher, the shoreline is shown as it appears today. Thus, the maps represent flooding that would occur absent any preparatory action or shoreline changes. Additionally, users should note that while the maps represent areas that could be at risk of flooding in the absence of adaptation action, there are numerous adaptation planning efforts occurring at many scales all around the Bay Area. These maps are meant to help inform those efforts and reduce the risks associated with sea level rise. You can read more about mapping methodologies and analysis in the technical methods report.</SPAN></P></DIV></DIV></DIV>
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The flooding maps and associated analyses provide a regional-scale illustration of coastal flooding due to specific sea level rise and storm surge scenarios, and are intended to improve sea level rise awareness and preparedness. The maps are not detailed to the parcel-scale and should not be used for navigation, permitting, regulation, project review, mitigation, actuarial estimations, or other legal uses. Flooding due to sea level rise and storm surges is possible in areas outside of those predicted in these maps, and the maps do not guarantee the safety of an individual or structure. While the maps use the best data available at its time of publication to capture topographic features (e.g., berms, tide gates), they may not capture other infrastructure improvements (e.g., pumps) designed to reduce future flood extent. The maps do not model flooding from other sources, such as riverine, groundwater, or surface water flooding from rainfall-runoff events, nor do they model erosion, subsidence, or local wind and wave effects. Learn more.For more information see the technical methods report.</SPAN></P></DIV></DIV></DIV>
SF Bay Conservation and Development Commission
BCDC GIS
SF Bay Conservation and Development Commission
gis@bcdc.ca.gov
Funding for the development of the ART Bay Shoreline Flood Explorer website comes from the California Air Resource Board, the Metropolitan Transportation Commission (MTC), and BCDC. This website was also prepared by BCDC using Federal funds under award NA16NOS4190123 from National Oceanic and Atmospheric Administration (NOAA), U.S. Department of Commerce. The statements, findings, conclusions, and recommendations are those of the author(s) and do not necessarily reflect the views of NOAA or the U.S. Department of Commerce. Website development was supported by the San Francisco Estuary Institute. The Flood Explorer hosts data developed through the Adapting to Rising Tides Bay Area Sea Level Rise Analysis and Mapping Project, which was funded by the Bay Area Toll Authority and MTC. AECOM, in collaboration with MTC and BCDC, created these sea level rise and shoreline analysis data for the entire Bay shoreline using methods and tools developed by BCDC, MTC, and partners in prior studies. As such, additional key contributors to these map products include: the Alameda County Flood Control and Water Conservation District, the San Francisco Public Utilities Commission, the California Department of Transportation – District Number 4, and San Francisco Estuary Institute. The project team also thanks DHI Group LLC., and the Federal Emergency Management Agency for the continued use and support of the maps developed for the San Francisco Bay Area Coastal Study. ART Bay Area analysis funding provided by a Caltrans Sustainable Transportation Planning Grant with additional funding by Metropolitan Transportation Commission (MTC), Bay Area Toll Authority (BATA) and Greenhouse Gas Reduction Fund (GGRF).
ART
BCDC
ART Bay Area
Shoreline
Flood. Sea Level Rise
storm surge
SF Bay
Bay Area
Flood Hazards
Enterprise Geodatabase Feature Class
0.000
dataset
EPSG
6.18.3(9.3.1.2)
0
Simple
FALSE
0
TRUE
TRUE
Overtopping Potential and Shoreline by Type
Feature Class
0
OBJECTID
OBJECTID
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
8
0
0
Feature geometry.
Esri
Coordinates defining the features.
Class
Class
String
50
0
0
"A description of the feature being mapped. ‘Engineered Levee’, ‘Floodwall’, ‘Berm’, ’Shoreline Protection Structure’, ‘Embankment’, ’Transportation Structure’, ’Natural Shoreline’, ’Wetland’, ’Channel or
Opening’, ’Water Control Structure’"
SFEI
Transporta
Transportation
String
20
0
0
Separated ‘Transportation Structure’ classification into two sub-classes, ‘Rail’ and ‘Major Road’ based on aerial imagery.
SFEI
Fortified
Fortified
String
20
0
0
If features were artificially hardened, indicated by the presence of concrete, riprap, or buttressing, than the ‘Fortified’ category was assigned a value of ‘Yes’. The best available aerial and satellite imagery (e.g., Bing Maps Aerial Imagery) was used to assign this field. Fortified field was assigned to all ten primary classification categories. Hardening of the mapped features could of been completed in an ad hoc manner or specifically designed to address wave erosion.
SFEI
Frontage
Frontage
String
30
0
0
Along the Bay shore, frontage was assigned to features where there is either a 1) wetland, 2) beach, or 3) wetland and beach in front of a feature. Category is assigned as ‘Wetland’, ‘Beach’, or ‘Wetland and Beach’, accordingly. “None’ designates Bay shore features with no wetland or beach frontage. A variety of aerial and satellite imagery (e.g., Bing Maps Aerial Imagery) was used to assign this field. Beaches were also identified from our partners at BCDC and were not explicitly mapped as features themselves.
SFEI
Bayshore_D
Bayshore Defense
String
150
0
0
This field identifies the first line of features along the shoreline which would provide the ‘first line of defense’ to coastal flooding. ‘First line of shoreline defense’ or ‘Not first line of shoreline defense’ or ‘Wetland on Bay shore’
SFEI
Agency_Des
Agency Designation
String
100
0
0
Field is populated for all ‘Engineered Levees’ to show FEMA’s designation (e.g., Ac- credited by FEMA, Formerly accredited by FEMA) as referenced from the FEMA MLI (2014) dataset or simply ‘Engineered’, if a feature was sourced as being engineered for flood management by an agency representative during dataset review meetings. ‘Accredited by FEMA’ or ‘Formerly Ac- credited by FEMA’ or ‘Engineered’ (if designated ‘Engineered Levee’ in Class field, or ‘Engineered’ if designated ‘Floodwall’ in Class field)
SFEI
Agency_D_1
Agency Designation Source
String
100
0
0
"Source for attributing the ‘Engineered Levee’ classification. (e.g., FEMA MLI (2014), CCCFCWCD,
provided by local stakeholders)"
SFEI
FEMA_Accre
FEMA Accreditation Date
Date
8
0
0
The year a structure was accredited by FEMA, based on the FEMA MLI (2014) data- set. Only attributed for ‘Engineered Levee’ features. (e.g., 1/15/1990)
SFEI
Primary_Ma
Primary Map Source
String
150
0
0
Refers to the primary DEM or other aerial imagery that was referenced for mapping. (e.g., USGS 2010, NOAA/OPC 2010)
SFEI
Geographic
Geographic County
String
100
0
0
The represented Bay Area county. (e.g., Alameda County)
SFEI
Public_Pri
Public/Private
String
10
0
0
Features were assigned ownership (e.g., private, public) based on county parcel data- sets or individual county, city, and agency knowledge, when data was available. The California Protected Areas Dataset (Green Info Network, 2014) was also referenced. While effort has been made to attribute ownership accurately, limitations exist as some mapped features bordered two different parcels and assigning ownership could not be differentiated within the parcel dataset.
SFEI
Owner_Deta
Owner Details
String
254
0
0
Specific names of owners, when data was available.
SFEI
Maintained
Maintained By
String
254
0
0
Designates who is responsible for maintenance of a feature. Information was gathered from city, county, and agency representatives, where information was available. Only limited information on maintenance was readily available.
SFEI
Additional
Additional
String
150
0
0
Comments_
Comments_
String
254
0
0
Additional comments for mapped features
OT_suppres
Suppress Overtopping
String
10
0
0
"Field to designate whether the segment is shown on printed maps. Typical segments that are not shown include wetland segments that are within ~100 feet of primary shoreline, channel openings, or elevated
transportation structures with openings. Yes' or 'No'"
AECOM
OT_ft
Overtopping Depth (ft)
Double
8
38
8
Overtopping potential depth (in feet) per shoreline segment. Null values indicate no overtopping. ‘Double' field type.
AECOM
Shape_Leng
Shape_Leng
Double
8
38
8
Accredited
FEMA Accredited
String
5
0
0
Yes or No
Cover
Cover
String
20
0
0
Comments
Comments
String
254
0
0
Additional comments for mapped features
Shape.STLength()
Shape.STLength()
Double
0
0
0
20220329