Parent Layer:
Coastal Storm Flood
Name: Flood Inundation by Large Storm 2060 High
Display Field: Connection
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: These hazard zones depict flooding caused by a coastal storm. The processes considered include (1) storm surge (a rise in the ocean water level caused by waves and pressure changes during a storm), (2) wave overtopping (waves running up over the beach and flowing into low-lying areas, calculated using the maximum historical wave conditions), (3) extreme lagoon water levels which can occur when lagoon mouths are closed and fill up during rainfall events, and (4) additional flooding caused by rising sea level in the future. This hazard zone also takes into account areas that are projected to erode in the future, sometimes leading to additional flooding through new hydraulic connections between the ocean and low-lying areas. These hazard zones do NOT consider upland fluvial (river) flooding and local rain/run-off drainage, which likely play a large part in coastal flooding, especially around coastal confluences where the creeks meet the ocean. There are two types of inundation areas: (1) areas that are clearly connected over the existing digital elevation through low topography, (2) and other low-lying areas that don’t have an apparent connection, as indicated by the digital elevation model, but are low-lying and flood prone from groundwater levels and any connections (culverts, underpasses) that are not captured by the digital elevation model. This difference is captured in the “Connection” attribute (either “connected to ocean over topography” or “connectivity uncertain”) in each rising tides dataset. We recommend these be mapped as separate colors. -------------------------------This feature is one in a series of coastal flood and erosion hazard zones developed as part of the Monterey Bay Sea Level Rise Vulnerability Study. For detailed documentation about how these hazard zones were developed, please see "Monterey Bay Sea Level Rise Vulnerability Assessment: Technical Methods Report," a report prepared by ESA PWA for The Monterey Bay Sanctuary Foundation in March 2014.-------------------------------The name of this shapefile reflects the future scenarios and planning horizon that the hazard zone represents, as follows:"coastal_floodhz" + _ + sea level rise scenario + planning horizon-------------------------------Sea level rise scenarios:ec – Existing conditions (2010 water level)s1 – Low sea level rise (41 cm by 2100)s2 – Medium sea level rise (88 cm by 2100)s3 – High sea level rise (159 cm by 2100)-------------------------------Planning horizons:2010 (Existing conditions)203020602100
Copyright Text: Environmental Science Associates - Philip Williams Associates, Ltd. (ESA PWA), 2014
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Spatial Reference: 102100
(3857)
Drawing Info:
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Value: connected to ocean over topography
Label: Connected to ocean over topography
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Label: Connectivity uncertain
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