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| Titel |
Extracting tectonic information using the integral method of river profile analysis: applications along the Wasatch fault, Utah |
| VerfasserIn |
Declan Valters |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250100184
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| Publikation (Nr.) |
 EGU/EGU2014-16074.pdf |
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| Zusammenfassung |
| Tectonic deformation at the Earth’s surface is reflected in the morphology of river profiles,
hill slopes, and drainage networks. Various topographic metrics derived from river profiles
have been proposed to identify tectonic hotspots in neotectonic regions. Using a high
resolution digital elevation model to extract topographic data from channel networks, the
advantages of the ‘integral method’ are exploited to analyse river profiles and catchments
across two segments of the Wasatch Fault Zone, Utah. The results demonstrate much lower
data noise when compared to standard practices of taking derivatives of topographic data.
Combined with statistical analysis, it is possible to identify segments of river profiles that
have responded to spatially variable rates of rock-deformation along the fault zone.
Using a channel steepness index derived from the integral method, we find that
previously published 10Be catchment-wide erosion rates exhibit conflicting scaling
relationships with basin-averaged steepness indices. This is possibly explained due to
occurrence of glacial erosion in certain basins during the last glacial maximum. A simple
method for calibrating stream power model parameters using the integral method is
used to estimate areas of fault displacement acceleration along the Wasatch Fault. |
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