Beach Morphology Monitoring Program
Summary Plot 6
Beach state parameters. A regional inventory of physical parameters that help to define the ‘state’ of the beach includes the average sediment size, beach slope, and dune crest elevation at each profile. The average median grain size from samples collected at approximately MHW during both the summer 1998 and summer 1999 survey are shown. The slope of the sub-aerial beach is defined as the gradient between the 1.0- and 3.0-m elevation contours on the profile. Slope values have been averaged for the 9 surveys that have been collected since 1997 at each of the 47 beach profile locations. The primary dune crest elevation is also given relative to NAVD 88.
List of beach monitoring summary plots. Select a summary plot to link to an on-line version or download an Adobe Acrobat version for printing.
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Summary plot 1: Beach profile elevation change along the Columbia River littoral cell: summer 1997-winter 1998 and summer 1997-summer 1998 (printable version).
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Summary plot 2: Horizontal beach profile change along the Columbia River littoral cell: summer 1997-winter 1998 and summer 1997-summer 1998 (printable version).
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Summary plot 3: Seasonal to annual horizontal change of the 2.0-m contour line. The mean position change of the 2.0-m contour has been calculated for 15 of the 16 surface map sites (printable version).
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Summary plot 4: Seasonal variability of the 2.0-m contour line (printable version).
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Summary plot 5: Nearshore beach profiles for each of the 4 sub-cells within the CRLC collected in 1999 (printable version).
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Summary plot 6: Beach state parameters (beach slope, sediment size, dune crest elevation) (printable version).
