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| Titel |
Analysis of shadows related to soil surface roughness as compared to the chain set method and direct measurement of microrrelief |
| VerfasserIn |
R. García Moreno, A. Paz González, M. C. Díaz Alvarez, A. M. Tarquis, Antonio Saa Requejo |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250021408
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| Zusammenfassung |
| Soil surface roughness (SSR) is an excellent index of soil susceptibility to wind and water
erosion. Several studies have been developed to characterize SSR based on different methods
of capturing the data, amongst them pin meter readings, chain set methodology and the laser
scanners. The present study therefore aimed to fill the need for a reliable, low-cost and
convenient field method to measure that parameter. Based on the interpretation of
micro-topographic shadows, the principle underlying shadow analysis is the direct
relationship between soil surface roughness and the shadows cast by soil structures under
fixed sunlight conditions. The results obtained with this method at laboratory from different
distribution of known altitudes through a surface of 1 m2 were compared to those obtained
form the chain method, in order to facilitate the further comparison at field. The altitudes
were simulated with semi-spherical geometric forms. The results showed the differences and
error sources of the different methods and validate the comparison at field of both techniques. |
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