im PublikationsserverTitelangaben
Kaiser, Andreas ; Neugirg, Fabian ; Haas, Florian
; Schmidt, Jürgen ; Becht, Michael ; Schindewolf, Marcus:
Determination of hydrological roughness by means of
close range remote sensing.
In: Soil : an interactive open access journal of the European Geosciences Union. (14. September 2015).
- S. 613-620.
ISSN 2199-3971
Volltext
|
Link zum Volltext (externe URL): http://www.soil-journal.net/1/613/2015/soil-1-613-... |
Kurzfassung/Abstract
The objective of the presented work was to develop a method to acquire Manning's n by creating very high-resolution surface models with structure-from-motion methods. As hydraulic roughness is an essential parameter for physically based erosion models, a practical measuring technique is valuable during field work. Data acquisition took place during several field experiments in the Lainbach valley, southern Germany, and on agricultural sites in Saxony, eastern Germany, and in central Brazil. Rill and interrill conditions were simulated by flow experiments. In order to validate our findings stream velocity was measured with colour tracers. Grain sizes were derived by measuring distances from a best fit line to the reconstructed soil surface. Several diameters from D50 to D90 were tested with D90 showing best correlation between tracer experiments and photogrammetrically acquired data. Several roughness parameters were tested (standard deviation, random roughness, Garbrecht's n and D90). Best agreement in between the grain size and the hydraulic roughness was achieved with a non-linear sigmoid function and D90 rather than with the Garbrecht equation or statistical parameters.
Forschungsprojekte
Weitere Angaben
| Publikationsform: | Artikel |
|---|---|
| Institutionen der Universität: | Mathematisch-Geographische Fakultät > Geographie > Lehrstuhl für Physische Geographie |
| Peer-Review-Journal: | Ja |
| Verlag: | Copernicus Publ. |
| Die Zeitschrift ist nachgewiesen in: | |
| Titel an der KU entstanden: | Ja |
| KU.edoc-ID: | 16235 |
Letzte Änderung: 21. Sep 2015 15:13
URL zu dieser Anzeige: https://edoc.ku.de/id/eprint/16235/
