Map of study area showing Grays Harbor and Columbia River Mouth

Maps of study area showing, A, extents of nested wave model grids (Tiers 1-3), locations of bathymetric and topographic survey lines, wave buoys, and tide gauges. Black boxes provide the locations of the detail areas shown in B-C. B-C, Maps showing bathymetry of the engineered inlets of B, Grays Harbor, and C, the Columbia River. The locations of survey lines, control volumes where integrated sediment volume changes were computed, and boundaries used for longshore transport calculations are provided in B-C. Insets in A shows distributions of wave height and direction for summer (June, July, August) and winter (December, January, February) during the study period based primarily on data obtained from CDIP buoy 179. Gaps in the wave buoy record (about 7%) were filled with model predictions for the buoy location from this study. The locations of Tillamook Head (TH), Point Grenville (PG), and Willapa Bay (WB) are denoted in A. Cartesian coordinates in panels B-C are provided in UTM Zone 10, meters.