West Coast Littoral Cells -- Polygon Based on Washington, Oregon, and California Data Collected from 2002 to 2015

These data depict littoral cells along the West Coast of the United States, as polygon extents across the shoreline of Washington, Oregon, and California. A littoral cell is a reach of the coast that is isolated sedimentologically from adjacent coastal reaches and that features its own sources and sinks. Isolation is typically caused by protruding headlands, submarine canyons, inlets and some river mouths that prevent littoral sediment from one cell to pass into the next (Beachapedia). The data are a compilation of existing data sources from Washington Department of Ecology (WDOE), Oregon Coastal Management Program (OCMP), and California Coastal Sediment Management Workgroup (CSMW). There is companion data set with the same attributes, but a different geographic presentation: "West Coast Littoral Cells -- Shoreline Based on Washington, Oregon, and California Data Collected from 2002 to 2015."

本数据集描绘了美国西海岸的沿岸输沙单元（littoral cell），以多边形范围覆盖华盛顿州、俄勒冈州与加利福尼亚州的海岸线。沿岸输沙单元是指在沉积学上与相邻海岸区段相互隔离、且拥有独立沉积物源与汇的海岸段。这种隔离通常由突出岬角、海底峡谷、进潮口及部分河口造成，可阻止泥沙从一个沿岸输沙单元进入另一单元（Beachapedia）。本数据集整合了来自华盛顿州生态厅（Washington Department of Ecology, WDOE）、俄勒冈州海岸管理项目（Oregon Coastal Management Program, OCMP）以及加利福尼亚州海岸沉积物管理工作组（California Coastal Sediment Management Workgroup, CSMW）的现有数据资源。本数据集配有一组属性相同但地理呈现方式不同的配套数据集：《西海岸沿岸输沙单元——基于2002至2015年收集的华盛顿、俄勒冈与加利福尼亚州数据的海岸线数据集》。