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Service Description: Jeff Anderson of Northern Hydrology prepared a DEM of Humboldt Bay representing water surface elevations of the present day mean monthly maximum water surface (MMMW). The MMMW surface was subtracted from the LiDAR DEM to produce a third DEM of relative elevations to the MMMW. These relative elevations were assigned to the shoreline segments at one meter spacing as the DEM is comprised of a one meter pixel resolution. The 1 meter spaced vertices of the shoreline segments were exported to a 3D point feature class. The shoreline segments were then broken at each vertex to produce 169,903 1 meter shoreline segments which all contained the original unique segment identifier, shoreline attributes, and start and end relative elevation values in the attribute table. An average relative elevation was calculated for each one meter shoreline segment and used as the basis for analysis. Submitted to the Coastal Sediment Management Workgroup as part of the Eureka Littoral Cell Regional Sediment Management Plan.

Map Name: CSMW_Humboldt_Bay_Water_Elevation

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Description: Jeff Anderson of Northern Hydrology prepared a DEM of Humboldt Bay representing water surface elevations of the present day mean monthly maximum water surface (MMMW). The MMMW surface was subtracted from the LiDAR DEM to produce a third DEM of relative elevations to the MMMW. These relative elevations were assigned to the shoreline segments at one meter spacing as the DEM is comprised of a one meter pixel resolution. The 1 meter spaced vertices of the shoreline segments were exported to a 3D point feature class. The shoreline segments were then broken at each vertex to produce 169,903 1 meter shoreline segments which all contained the original unique segment identifier, shoreline attributes, and start and end relative elevation values in the attribute table. An average relative elevation was calculated for each one meter shoreline segment and used as the basis for analysis. Submitted to the Coastal Sediment Management Workgroup as part of the Eureka Littoral Cell Regional Sediment Management Plan.

Copyright Text: Aldaron Laird - Trinity Associates; Brian Powell - McBain and Trush, Inc.; Jeff Anderson - Northern Hydrology; California Coastal Conservancy

Spatial Reference: 102100  (3857)


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Initial Extent:

XMin: -1.384834334621207E7
YMin: 4962732.7875299975
XMax: -1.3797970159387928E7
YMax: 5001225.907470003
Spatial Reference: 102100  (3857)

Full Extent:

XMin: -1.38338772973E7
YMin: 4964482.474799998
XMax: -1.38124362083E7
YMax: 4999476.220200002
Spatial Reference: 102100  (3857)

Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info:

Title: Humboldt Bay Mean Monthly Maximum Water Elevation
Author:
Comments: Jeff Anderson of Northern Hydrology prepared a DEM of Humboldt Bay representing water surface elevations of the present day mean monthly maximum water surface (MMMW). The MMMW surface was subtracted from the LiDAR DEM to produce a third DEM of relative elevations to the MMMW. These relative elevations were assigned to the shoreline segments at one meter spacing as the DEM is comprised of a one meter pixel resolution. The 1 meter spaced vertices of the shoreline segments were exported to a 3D point feature class. The shoreline segments were then broken at each vertex to produce 169,903 1 meter shoreline segments which all contained the original unique segment identifier, shoreline attributes, and start and end relative elevation values in the attribute table. An average relative elevation was calculated for each one meter shoreline segment and used as the basis for analysis. Submitted to the Coastal Sediment Management Workgroup as part of the Eureka Littoral Cell Regional Sediment Management Plan.
Subject: Shoreline elevations relative to a modeled mean monthly maximum water surface in relation to shoreline conditions as mapped by Aldaron Laird.
Category:
Keywords: Shoreline Conditions,Relative elevations,Mean Monthly Maximum Water elevation,LiDAR,Orthophotos,Natural Shoreline,Artificial Shoreline,Structures,Cover Type,Salt Marsh,Habitat,Arcata Bay,Mad River Slough,Eureka Slough,Eureka Bay,Elk River Slough,South Bay,Humboldt Bay,Eureka,California
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