{ "currentVersion": 10.91, "cimVersion": "2.9.0", "id": 97, "name": "Coastal Flooding Existing", "type": "Feature Layer", "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\u2019t 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 \u201cConnection\u201d attribute (either \u201cconnected to ocean over topography\u201d or \u201cconnectivity uncertain\u201d) in each rising tides dataset. We recommend these be mapped as separate colors. Coastal Storm FloodingThe ESA coastal storm flooding hazard layers included cliff areas predicted to have eroded during previous time horizons as being vulnerable to coastal flooding hazards, because the land elevation within those areas was assumed to have been reduced due to that cliff erosion. For example, sections of cliff in Santa Cruz that are projected to erode by 2060 (after coastal armoring is assumed to no longer function) are also projected to experience coastal flooding and wave over-topping within those newly eroded coastal areas. This is an accurate interpretation of the projected combined erosion and coastal flooding processes but introduces a confounding effect when attempting to evaluate just one hazard verses another, wherein erosion is overlapping coastal flooding in some areas. To remove this overlap, erosion processes were removed from the coastal hazard processes by trimming the coastal flooding layer along cliff areas to the 20ft topographic contour for all coastal hazard time horizons (2010, 2030, 2060, 2100). This allows coastal flooding to be separated from erosion and each can be evaluated individually.Vulnerable, Managed, and Protected (Coastal Storm Flooding and Rising Tides)Per the City's request, specific inundation areas in Santa Cruz were reclassified from 'Vulnerable' to either 'Managed' or 'Protected' for both rising tides and coastal storm flooding hazards. These areas included low-lying neighborhoods of lower Ocean Street, the beach flats, and some streets in downtown, as well as Neary Lagoon. These areas are already at risk of inundation during high-flow events of the San Lorenzo River (lower Ocean, beach flats, downtown) or from tidal forces (Neary Lagoon); which are currently mitigated by water control structures such as levees, flap gates, slide gates, and pumps. Classifications were assigned based on input provided by City Public Work's staff and vary depending on location and hazard type. The classifications are summarized as follows:Coastal FloodingBeach Flats = ManagedLower Ocean = ProtectedDowntown = ProtectedLagoon = ManagedRising TidesBeach Flats = ManagedLower Ocean = ManagedDowntown = Not ApplicableLagoon = ManagedIt is assumed that during coastal storm flooding Lower Ocean and Downtown will be protected by the levee, while the Lagoon and the beach flats are managed by water control structures. It should also be noted that in the 2060 and 2100 time horizons the beach flats area may become fully connected to the ocean over land flow, therefore in those scenarios those areas are classified as 'Vulnerable.' It is assumed that water control structures will mitigate tidal inundation to all low-lying areas within the city. When compiling hazard data layers for the combined threatened area within each time horizon, classifications of those areas listed above were chained to the coastal flooding attributes.The analysis was developed and results were generated taking those classifications into consideration, therefore enabling querying of these management structures separately from normally \u2018Vulnerable' areas. -------------------------------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 \u2013 Existing conditions (2010 water level)s1 \u2013 Low sea level rise (41 cm by 2100)s2 \u2013 Medium sea level rise (88 cm by 2100)s3 \u2013 High sea level rise (159 cm by 2100)-------------------------------Planning horizons:2010 (Existing conditions)203020602100--------------------------------Armoring:filenames ending in \"a\" include existing coastal armorning in the analysis", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 102643, "latestWkid": 2227, "xyTolerance": 0.003280833333333333, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -115860600, "falseY": -93269500, "xyUnits": 3048.0060960121928, "falseZ": 0, "zUnits": 1, "falseM": 0, "mUnits": 1 }, "copyrightText": "Environmental Science Associates - Philip Williams Associates, Ltd. (ESA PWA), 2014\nCentral Coast Wetlands Group", "parentLayer": { "id": 96, "name": "Coastal Flooding" }, "subLayers": [], "minScale": 0, "maxScale": 0, "drawingInfo": { "renderer": { "type": "uniqueValue", "field1": "Connect2", "uniqueValueInfos": [ { "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 0, 77, 168, 255 ], "outline": null }, "value": "IMPACTED", "label": "Vulnerable" }, { "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 132, 0, 168, 255 ], "outline": null }, "value": "MANAGED", "label": "Currently Managed" }, { "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 168, 112, 0, 255 ], "outline": null }, "value": "PROTECTED", "label": "Currently Protected" } ], "fieldDelimiter": ",", "authoringInfo": { "colorRamp": { "type": "multipart", "colorRamps": [ { "type": "algorithmic", "algorithm": "esriHSVAlgorithm", "fromColor": [ 56, 168, 0, 255 ], "toColor": [ 255, 255, 0, 255 ] }, { "type": "algorithmic", "algorithm": "esriHSVAlgorithm", "fromColor": [ 255, 255, 0, 255 ], "toColor": [ 255, 0, 0, 255 ] } ] } } }, "scaleSymbols": false, "transparency": 0, "labelingInfo": null }, "defaultVisibility": true, "extent": { "xmin": 6102161.354173139, "ymin": 1803101.697920233, "xmax": 6130767.297617301, "ymax": 1819187.6181761473, "spatialReference": { "wkid": 102643, "latestWkid": 2227, "xyTolerance": 0.003280833333333333, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -115860600, "falseY": -93269500, "xyUnits": 3048.0060960121928, "falseZ": -100000, "zUnits": 10000, "falseM": -100000, "mUnits": 10000 } }, "hasAttachments": false, "htmlPopupType": "esriServerHTMLPopupTypeAsHTMLText", "displayField": "Connection", "typeIdField": null, "subtypeFieldName": null, "subtypeField": null, "defaultSubtypeCode": null, "fields": [ { "name": "OBJECTID", "type": "esriFieldTypeOID", "alias": "OBJECTID", "domain": null }, { "name": "Shape", "type": "esriFieldTypeGeometry", "alias": "Shape", "domain": null }, { "name": "Id", "type": "esriFieldTypeInteger", "alias": "Id", "domain": null }, { "name": "Connection", "type": "esriFieldTypeString", "alias": "Connection", "length": 254, "domain": null }, { "name": "Connect2", "type": "esriFieldTypeString", "alias": "Connect2", "length": 50, "domain": null }, { "name": "SC_connect", "type": "esriFieldTypeString", "alias": "SC_connect", "length": 50, "domain": null }, { "name": "area_ft", "type": "esriFieldTypeDouble", "alias": "area_ft", "domain": null }, { "name": "ORIG_FID", "type": "esriFieldTypeInteger", "alias": "ORIG_FID", "domain": null }, { "name": "Shape.STArea()", "type": "esriFieldTypeDouble", "alias": "Shape.STArea()", "domain": null }, { "name": "Shape.STLength()", "type": "esriFieldTypeDouble", "alias": "Shape.STLength()", "domain": null } ], "geometryField": { "name": "Shape", "type": "esriFieldTypeGeometry", "alias": "Shape" }, "indexes": [ { "name": "R1146_pk", "fields": "OBJECTID", "isAscending": true, "isUnique": true, "description": "" }, { "name": "S1031_idx", "fields": "Shape", "isAscending": true, "isUnique": true, "description": "" } ], "subtypes": [], "relationships": [], "canModifyLayer": true, "canScaleSymbols": false, "hasLabels": false, "capabilities": "Query,Map,Data", "maxRecordCount": 2000, "supportsStatistics": true, "supportsExceedsLimitStatistics": true, "supportsAdvancedQueries": true, "supportedQueryFormats": "JSON, geoJSON, PBF", "isDataVersioned": false, "ownershipBasedAccessControlForFeatures": {"allowOthersToQuery": true}, "useStandardizedQueries": true, "supportedSpatialRelationships": [ "esriSpatialRelIntersects", "esriSpatialRelContains", "esriSpatialRelCrosses", "esriSpatialRelEnvelopeIntersects", "esriSpatialRelIndexIntersects", "esriSpatialRelOverlaps", "esriSpatialRelTouches", "esriSpatialRelWithin", "esriSpatialRelRelation" ], "advancedQueryCapabilities": { "useStandardizedQueries": true, "supportsStatistics": true, "supportsPercentileStatistics": true, "supportsHavingClause": true, "supportsOrderBy": true, "supportsDistinct": true, "supportsCountDistinct": true, "supportsPagination": true, "supportsLod": false, "supportsQueryWithLodSR": false, "supportsTrueCurve": true, "supportsQueryWithDatumTransformation": true, "supportsReturningQueryExtent": true, "supportsQueryWithDistance": true, "supportsSqlExpression": true, "supportsTimeRelation": true, "supportsSqlFormat": false, "supportsQueryAnalytic": true }, "supportsDatumTransformation": true, "advancedQueryAnalyticCapabilities": { "supportsLinearRegression": true, "supportsAsync": false, "supportsPercentileAnalytic": true }, "dateFieldsTimeReference": null, "preferredTimeReference": null, "datesInUnknownTimezone": false, "hasGeometryProperties": true, "geometryProperties": { "shapeAreaFieldName": "Shape.STArea()", "shapeLengthFieldName": "Shape.STLength()", "units": "esriFeet" }, "hasMetadata": true, "isDataArchived": false, "archivingInfo": { "supportsQueryWithHistoricMoment": false, "startArchivingMoment": -1 }, "supportsCoordinatesQuantization": true, "supportsDynamicLegends": true }