Channel mapping Glen Canyon Dam to Lees Ferry in Glen Canyon National Recreation Area, Arizona - Data

Bathymetric, topographic, and grain-size data were collected from May 2013 to October 2016 along a 15-mi reach of the Colorado River in Glen Canyon National Recreation Area, Arizona by the U.S. Geological Survey Grand Canyon Monitoring and Research Center. The study reach is located from river miles -15 at the base of Glen Canyon Dam to 0 at Lees Ferry. Channel bathymetry was mapped using multibeam bathymetry collected in November 2014 and single beam bathymetry collected in February 2015, August 2015, February 2016, and June 2016. Subaerial topography was mapped using photogrammetry derived from aerial Imagery collected in May 2013 and ground-based total-stations collected in February 2015, October 2015, and October 2016. Bed-sediment grain-size data were collected in November 2014 using an underwater digital microscope system. These data were combined to produce digital elevation models, spatially variable estimates of digital elevation model uncertainty, georeferenced grain-size data, and bed-sediment distribution maps.

美国地质调查局大峡谷监测与研究中心于2013年5月至2016年10月间，在亚利桑那州格伦峡谷国家游乐区的科罗拉多河15英里长河段采集了水深测量、地形测量与沉积物粒度数据。该研究河段的范围为格伦峡谷大坝坝址处的河英里-15至利斯渡口（Lees Ferry）处的河英里0。河道水深测量于2014年11月通过多波束测深系统完成，2015年2月、2015年8月、2016年2月及2016年6月则采用单波束测深系统补充测绘。陆上地形测绘依托2013年5月采集的航空影像通过摄影测量法获取数据，2015年2月、2015年10月及2016年10月则采用地面全站仪完成实地测绘。床沙粒度数据于2014年11月利用水下数字显微镜系统采集。通过整合上述各类数据，最终生成了数字高程模型（digital elevation model）、空间变异的数字高程模型不确定性估算值、地理参考沉积物粒度数据以及床沙分布图。