Citation:

PANGAEA.959938

Name: Relative elevation of the Rio Bermejo with respect to its floodplain
Published: 2023-07-13
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Argentina; channel migration rates; fluvial geomorphology; Foreland basin; river morphometrics; water chemistry

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Published: 2023-07-13 • DOI registered: 2023-08-11

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Abstract:

Relative elevation data was extracted from the map of residual topography over 25-40 km swaths extending from the Rio Bermejo channel centerline. We quantified the superelevation and incision of the Rio Bermejo relative to the surrounding topography by making a residual elevation map (sensu Cohen et al. (2015, doi:10.1130/2015.1212(16); McGlue et al. (2016, doi:10.2110/jsr.2016.82)). We created a series of 1 km wide swaths set perpendicular to the Rio Bermejo flow direction and extracted the minimum elevation of the active Rio Bermejo channel within each swath using the TanDEM-X DEM. Variability in DEM values for water surfaces created ~2-4 m noise in elevation values of the active channel which we smoothed by fitting a 4th order polynomial to the extracted active channel elevations to estimate the downstream change in elevation. We subtracted the polynomial fit from the DEM to yield a DEM that was de-trended from the Rio Bermejo channel slope, with values representing the local relief between the active channel and the surrounding terrain.

Keyword(s):

Argentina; channel migration rates; fluvial geomorphology; Foreland basin; river morphometrics; water chemistry

Project(s):

StRATEGy international research training group (StRATEGy)

Funding:

Deutsche Forschungsgemeinschaft, Bonn (DFG), grant/award no. STR 373/34-1: StRATEGy

Comment:

Relative elevation is the elevation of the flood basin surface relative to the river channel. Positive values represent channel incision, negative values represent channel superelevation.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Distance	Distance	km	Repasch, Marisa N		Downslope from Mountain Front
2	River level, relative	River level rel	m	Repasch, Marisa N	See description in dataset comment	Channel Elevation
3	River level, relative	River level rel	m	Repasch, Marisa N	See description in dataset comment	Relative Elevation* 5th percentile
4	River level, relative	River level rel	m	Repasch, Marisa N	See description in dataset comment	Relative Elevation* 25th percentile
5	River level, relative	River level rel	m	Repasch, Marisa N	See description in dataset comment	Relative Elevation* 50th percentile
6	River level, relative	River level rel	m	Repasch, Marisa N	See description in dataset comment	Relative Elevation* 75th percentile
7	River level, relative	River level rel	m	Repasch, Marisa N	See description in dataset comment	Relative Elevation* 95th percentile

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

4851 data points

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