Automated identification of stream-channel geomorphic features from high‑resolution digital elevation models in West Tennessee watersheds
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Abstract
High-resolution digital elevation models (DEMs) derived from light detection and ranging (lidar) enable investigations of stream-channel geomorphology with much greater precision than previously possible. The U.S. Geological Survey has developed the DEM Geomorphology Toolbox, containing seven tools to automate the identification of sites of geomorphic instability that may represent sediment sources and sinks in stream-channel networks. These tools can be used to modify input DEMs on the basis of known locations of stormwater infrastructure, derive flow networks at user-specified resolutions, and identify possible sites of geomorphic instability including steep banks, abrupt changes in channel slope, or areas of rough terrain. Field verification of tool outputs identified several tool limitations but also demonstrated their overall usefulness in highlighting likely sediment sources and sinks within channel networks. In particular, spatial clusters of outputs from multiple tools can be used to prioritize field efforts to assess and restore eroding stream reaches.
Suggested Citation
Cartwright, J.M., and Diehl, T.H., 2017, Automated identification of stream-channel geomorphic features from high‑resolution digital elevation models in West Tennessee watersheds: U.S. Geological Survey Scientific Investigations Report 2016–5141, 44 p., https://doi.org/10.3133/sir20165141.
ISSN: 2328-0328 (online)
ISSN: 2328-031X (print)
Study Area
Table of Contents
- Abstract
- Introduction
- Methods of Study
- Evaluation of Automated Tools for Geomorphic Feature Identification
- Summary and Conclusions
- References Cited
- Glossary
- Appendix 1. Prospectus for Tool Application to Larger Geographic Areas
Publication type | Report |
---|---|
Publication Subtype | USGS Numbered Series |
Title | Automated identification of stream-channel geomorphic features from high‑resolution digital elevation models in West Tennessee watersheds |
Series title | Scientific Investigations Report |
Series number | 2016-5141 |
DOI | 10.3133/sir20165141 |
Year Published | 2017 |
Language | English |
Publisher | U.S. Geological Survey |
Publisher location | Reston, VA |
Contributing office(s) | Lower Mississippi-Gulf Water Science Center |
Description | Report: viii, 44 p. |
Country | United States |
State | Tennessee |
Online Only (Y/N) | N |
Google Analytic Metrics | Metrics page |