Surface sediment grain size distributions derived from manual point counts of in situ seafloor images from the lower Columbia River, Washington and Oregon, 2021

This dataset contains surface sediment grain size distributions derived from manual point counts of in situ seafloor images obtained with an underwater camera system...本数据集包含通过水下摄像系统(underwater camera system)采集的原位海底图像(in situ seafloor images)，经人工点计数(manual point counts)处理后得到的表层沉积物粒度分布(surface sediment grain size distributions)数据。