Measurements of bed grain size on the Colorado River in Grand Canyon National Park, Arizona - 2000 to 2014

These data were compiled to better understand sedimentation patterns on the bed of the Colorado River in Grand Canyon National Park, and the way these patterns relate to suspended sediment grain size and concentration. These data were collected by the US Geological Survey Grand Canyon Monitoring and Research Center from 2000 to 2014, primarily using the "Flying Eyeball" underwater imaging system. This dataset is composed of over 50,000 samples, as part of 16 individual data tables from 16 research expeditions. On each expedition, grain size measurements were made in a grid-like pattern over short segments of the river. Each point sample includes mean grain size, geographic coordinates, date, and geomorphic setting.

本数据集旨在深入了解大峡谷国家公园内科罗拉多河河床的沉积模式，以及该模式与悬浮泥沙粒径和浓度的关联关系。本数据集由美国地质调查局（US Geological Survey）大峡谷监测与研究中心于2000年至2014年间采集，主要使用"Flying Eyeball"水下成像系统完成数据获取。本数据集包含逾50000个样本，涵盖16次科研考察所生成的16张独立数据表。每次科考考察中，研究人员均以网格状采样模式对河道短区段开展泥沙粒径测量。每个点位样本均包含平均粒径、地理坐标、采集日期以及地貌环境信息。