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Source of error and uncertainty in sheet erosion rates estimated from dendrogeomorphology
Earth surface processes and landforms, 2015-07, Vol.40 (9), p.1146-1157
Bodoque, José M.
Ballesteros-Cánovas, Juan A.
Lucía, Ana
Díez-Herrero, Andrés
Martín-Duque, José F.
2015
Volltextzugriff (PDF)
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Autor(en) / Beteiligte
Bodoque, José M.
Ballesteros-Cánovas, Juan A.
Lucía, Ana
Díez-Herrero, Andrés
Martín-Duque, José F.
Titel
Source of error and uncertainty in sheet erosion rates estimated from dendrogeomorphology
Ist Teil von
Earth surface processes and landforms, 2015-07, Vol.40 (9), p.1146-1157
Ort / Verlag
Bognor Regis: Blackwell Publishing Ltd
Erscheinungsjahr
2015
Quelle
Wiley Online Library
Beschreibungen/Notizen
Dendrogeomorphology has been used since the 1960s to estimate sheet erosion rates. To date, most efforts have focused on accurately determining the first year of root exposure. However, an adequate methodological approach that takes into consideration the microtopography of the ground surface when estimating sheet erosion rates using dendrogeomorphology has not been proposed. In this study, terrestrial laser scanning (TLS) was used for the first time to examine how changes in microtopography determine the level of certainty in estimates. To this end, highly accurate TLS‐based digital elevation models representing exposed roots and their immediate vicinity were analysed using geographic information system tools. The results indicate that erosion rates calculated using the standard dendrogeomorphic method have been underestimated by up to 29% because the method does not take into account changes to the microtopography caused by the axial and radial pressure of the roots. Another source of uncertainty, which we estimate to be 50%, was also found and is the result of changes in the ground surface microtopography caused by variations in soil roughness. These findings do not invalidate the usefulness of dendrogeomorphology for assessing soil erosion, although they do show the need for correct characterization of the microtopography to guarantee reliability. Copyright © 2015 John Wiley & Sons, Ltd.
Sprache
Englisch
Identifikatoren
ISSN: 0197-9337
eISSN: 1096-9837
DOI: 10.1002/esp.3701
Titel-ID: cdi_proquest_miscellaneous_1758245691
Format
–
Schlagworte
dendrogeomorphology
,
Erosion rate
,
Estimates
,
Estimating
,
Exposure
,
GIS
,
Grounds
,
microtopography
,
Roots
,
Roughness
,
sheet erosion
,
terrestrial laser scanning
,
Uncertainty
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