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| Titel |
SRTM DEM levels over papyrus swamp vegetation – a correction approach |
| VerfasserIn |
G. Petersen, I. Lebed, N. Fohrer |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: Transdisciplinary concepts and modelling strategies for the assessment of complex environmental systems ; Nr. 21 (2009-08-12), S.81-84 |
| Datensatznummer |
250014532
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| Publikation (Nr.) |
 copernicus.org/adgeo-21-81-2009.pdf |
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| Zusammenfassung |
| The SRTM DEM, a digital elevation model based on the
Shuttle Radar Topography Mission of February 2000 is a source of elevation
data with nearly worldwide coverage. It has proven its usefulness in various
regions but problems persist for densely vegetated areas where, caused by
the organic matter and water content of the vegetation, the radar signal is
reflected at some level between the vegetation canopy and the ground level.
This level varies with different types and densities of vegetation cover and
has so far not been assessed for papyrus areas. The paper describes the
approach and establishment of a correction factor for a pilot area in the
Sudd swamps of southern Sudan based on comparison of SRTM reference levels
and ground control points collected during field surveys between 2004 and
2006. Results show a correction factor between the sensed and the real
surface of 4.66 m and a average penetration depth of the radar signal into
the dense papyrus vegetation of 0.34 m. |
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