### Channel mapping river miles 29–62 of the Colorado River in Grand Canyon National Park, Arizona, May 2009

By: Matt KaplinskiJoseph E. Hazel Jr.Paul E. Grams**Keith Kohl**Daniel D. Buscombe**Robert B. Tusso**

                            https://doi.org/10.3133/ofr20171030

#### Links

-                                                                                                                             Document:                                                                                                                                                                                                                                                  **Report**                                                                                                     (2.6 MB pdf)                                                                                                                                     
- Data Releases:                               - **USGS data release —**  - Channel Mapping of the Colorado River in Grand Canyon National Park, Arizona, May 2009, river miles 29 to 62—Data
  - **USGS data release**  - Channel Mapping of the Colorado River in Grand Canyon National Park, Arizona - May 2009, river miles 29 to 62Data 
- Download citation as:  RIS                         |                         Dublin                            Core

#### Abstract

First posted March 23, 2017

**For additional information, contact:**
GCMRC Staff, Southwest Biological Science Center U.S. Geological Survey Grand Canyon Monitoring and Research Center 2255 N. Gemini Drive Flagstaff, Arizona 86001https://www.gcmrc.gov/

Bathymetric, topographic, and grain-size data were collected in May 2009 along a 33-mi reach of the Colorado River in Grand Canyon National Park, Arizona. The study reach is located from river miles 29 to 62 at the confluence of the Colorado and Little Colorado Rivers. Channel bathymetry was mapped using multibeam and singlebeam echosounders, subaerial topography was mapped using ground-based total-stations, and bed-sediment grain-size data were collected 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. This project is a component of a larger effort to monitor the status and trends of sand storage along the Colorado River in Grand Canyon National Park. This report documents the survey methods and post-processing procedures, digital elevation model production and uncertainty assessment, and procedures for bed-sediment classification, and presents the datasets resulting from this study.

#### Suggested Citation

Kaplinski, M., Hazel, J.E., Jr., Grams, P.E., Kohl, Keith, Buscombe, D.D., and Tusso, R.B., 2017, Channel mapping river miles 29–62 of the Colorado River in Grand Canyon National Park, Arizona, May 2009: U.S. Geological Survey Open-File Report 2017–1030, 35 p., https://doi.org/10.3133/ofr20171030.

ISSN: 2331-1258 (online)

#### Study Area

#### Table of Contents

- Abstract
- Introduction
- Data Collection and Processing
- Digital Elevation Models
- Digital Elevation Model Uncertainty
- Results
- Summary
- Acknowledgments
- References Cited

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