Geomorphic Process from Topographic FormData & Models
The repeat topographic datasets used here are digital surface models (DSMs) derived using automated photogrammetry from photographs captured via aerial overflights during May 2002, 2009, and 2013. During overflights, discharge from Glen Canyon dam was held steady at 226 m3/s, and all subsequent analyses presented here apply to stages above this constant low flow discharge. DSMs are unique from traditional digital elevation models (DEMs) in that DSMs are not processed to remove vegetation. To compute geomorphic change during the inter-survey period, we used the Geomorphic Change Detection 6 software (http://gcd.joewheaton.org; see Wheaton et al., 2010). We assessed elevation uncertainty in the DSMs and found that uncertainty was spatially variable and significantly influenced by both surface slope and roughness, and thus employed a fuzzy inference system (FIS) to estimate DSM uncertainty on a pixel-by-pixel basis. Full details on the theory and implementation of FIS error modeling can be found in Wheaton et al., 2010, 2013, Kasprak et al., 2015, and Bangen et al., 2016. These data and models are associated with the journal manuscript: Kasprak A., Caster J., Bangen S., and Sankey J., 2017, Geomorphic process from topographic form: automating the interpretation of repeat survey data in river valleys: Earth Surface Processes and Landforms v. (online), doi: 10.1002/esp.4143, https://dx.doi.org/10.1002/esp.4143.
Citation Information
| Publication Year | 2017 |
|---|---|
| Title | Geomorphic Process from Topographic FormData & Models |
| DOI | 10.5066/F73776X6 |
| Authors | Alan Kasprak, Joshua J Caster, Joel B Sankey, Sara Bangen |
| Product Type | Data Release |
| Record Source | USGS Digital Object Identifier Catalog |
| USGS Organization | Southwest Biological Science Center - Flagstaff, AZ, Headquarters |
Related Content
Geomorphic process from topographic form: automating the interpretation of repeat survey data in river valleys
Alan Kasprak (Former Employee)
Research Geologist - Mendenhall Post-Doc
Related Content
- Publications
Geomorphic process from topographic form: automating the interpretation of repeat survey data in river valleys
The ability to quantify the processes driving geomorphic change in river valley margins is vital to geomorphologists seeking to understand the relative role of transport mechanisms (e.g. fluvial, aeolian, and hillslope processes) in landscape dynamics. High-resolution, repeat topographic data are becoming readily available to geomorphologists. By contrasting digital elevation models derived from rAuthorsAlan Kasprak, Joshua J. Caster, Sara G. Bangen, Joel B. Sankey - Connect
Alan Kasprak (Former Employee)
Research Geologist - Mendenhall Post-Doc