Beach Morphology Monitoring Program
Summary Plot 1
Beach profile elevation change along the Columbia River littoral cell: summer 1997-winter 1998 and summer 1997-summer 1998. The negative values (light gray-shaded bars) represent beach lowering, or erosion of the profile, and the positive values (dark shaded bars) represent beach elevation gain, or accretion. Due to the anomalous forcing conditions of El Niņo, the southern ends of sub-cells, Ft. Canby (CANBY), Cape Shoalwater (GELF) and Ocean Shores (X1 SOUTH), experienced high levels of erosion, while the northern ends of sub-cells, Clatsop Spit (EAST JETTY 2) and Westport (HD-1), accreted during winter 1998. Analyses of profile data from the summer 1998 survey indicates partial recovery of many of the profiles, however, several sites did not fully recover to their summer 1997 condition. (link to printable version)
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).
