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| Titel |
Identification and mapping of soil erosion areas in the Blue Nile, Eastern Sudan using multispectral ASTER and MODIS satellite data and the SRTM elevation model |
| VerfasserIn |
M. Haj Tahir, A. Kääb, C.-Y. Xu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 14, no. 7 ; Nr. 14, no. 7 (2010-07-02), S.1167-1178 |
| Datensatznummer |
250012361
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| Publikation (Nr.) |
 copernicus.org/hess-14-1167-2010.pdf |
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| Zusammenfassung |
| The area of the Upper Blue Nile in Eastern Sudan is considered prone to soil
erosion which is an important indicator of the land degradation process. In
this study, an erosion identification and mapping approach is developed
based on adaptations to the regional characteristics of the study area and
the availability of data. This approach is derived from fusion between
remote sensing data and geographical information systems (GIS). The
developed model is used to map the spatial distribution of soil erosion
caused by the rains of 2006 using automatic classification of multispectral
Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER)
imagery. Shuttle Radar Topography Mission (SRTM) digital elevation model is
used to orthoproject ASTER data. A maximum likelihood classifier is trained
with four classes, Gully, Flat_land, Mountain and Water and applied to
images from March and December 2006. Validation is done with field data from
December and January 2006/2007. The results allow the identification of
erosion gullies and subsequent estimation of eroded area. Consequently, the
results are up-scaled using Moderate Resolution Imaging Spectroradiometer
(MODIS) products of the same dates. Because the selected study site is
representative of the wider Blue Nile region, it is expected that the
approach presented could be applied to larger areas. |
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