全景航拍，展示了河口在沿海冲积平原上因沿岸漂移沙而形成的景象。沉积物堆积形成了河道与大海交汇处的沙洲

d footage captures longshore drift sands shaping river mouth on coastal alluvial plain. Surface movement, shoreline form, and water contrast give the frame clear natural structure. Height and wide coverage help separate patterns, routes, and textures without visual clutter. It works well for travel, geography, nature, and environmental storytelling.