Beach Morphology Monitoring Program
Summary Plot 4

Figure ES-4. Seasonal variability of the 2.0-m contour line. This figure demonstrates the seasonal variability of shoreline change along the CRLC. The average winter erosion and average summer accretion observed during the first two years of the monitoring program are presented. These large shoreline change rates tend to balance each other to produce the lower net annual shoreline change rates that are also plotted on the figure. Many of the surface map sites experienced significant net change over this two-year period, e.g., 6 m/yr of net progradation at the East Jetty site and 13 m/yr of net recession at the North Head site. Each sub-cell shows maximum net erosion or minimum net accretion at the southern end of the sub-cells (except in the North Beach sub-cell where these extremes occur closer to the middle) and maximum net accretion at the northern sub-cell boundaries. These data suggest that the sub-cell shorelines have realigned themselves in response to the acute southerly wave directions associated with the 1997/1998 El Niño.

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.

• Summary plot 1: Beach profile elevation change along the Columbia River littoral cell: summer 1997-winter 1998 and summer 1997-summer 1998 (printable version).

• Summary plot 2: Horizontal beach profile change along the Columbia River littoral cell: summer 1997-winter 1998 and summer 1997-summer 1998 (printable version).

• 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).

• Summary plot 4: Seasonal variability of the 2.0-m contour line (printable version).

• Summary plot 5: Nearshore beach profiles for each of the 4 sub-cells within the CRLC collected in 1999 (printable version).

• Summary plot 6: Beach state parameters (beach slope, sediment size, dune crest elevation) (printable version).

Ecology - SEA Program | USGS - Coastal & Marine Geology

This is http://www.ecy.wa.gov/programs/sea/swces/research/change/monitoring/beach_profiles.htm
Maintained by CMAP, Washington Department of Ecology
Address questions and comments to George Kaminsky
Modified 26 Apr 2006