Source of error and uncertainty in sheet erosion rates estimated from dendrogeomorphology

Pozo, José María Bodoque del; Ballesteros‐Cánovas, Juan Antonio; Lucía, Ana; Díez‐Herrero, Andrés; Martín‐Duque, José F.

doi:10.1002/esp.3701

Cited by 27 publications

(26 citation statements)

References 32 publications

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“…(), Bodoque et al . () or Ballesteros‐Cánovas et al . () and underline the importance of proper ground microtopography.…”

Section: Discussionmentioning

confidence: 94%

“…The investigated trail was divided into five zones, which are hereafter referred to as A‐stony part, A‐without stoniness, B, C and D (see Figure for details). Characterization of ground microtopography can be a critical factor to be considered, as it allows obtaining accurate erosion rates using dendrogeomorphic techniques (Stoffel et al ., ; Ballesteros‐Cánovas et al ., ; Bodoque et al ., ). In that sense, and given the difficulties of TLS portability in mountainous areas, we propose an alternative method based on the use of microtopographic profile gauges (Benito et al ., ; Desir & Marin, ; Figure B and C).…”

Section: Methodsmentioning

confidence: 97%

“…The gauges were in fact used to obtain ground surface profiles, from which E x was estimated once the threshold distance ( TD ) was determined. TD is here defined as the distance between the root and the sediment knickpoint, from which the profile defines the lowered of ground surface because of sheet erosion (Bodoque et al ., ). For this purpose, a microtopographic profile gauge was placed perpendicularly to the exposed root, and levelled horizontally for all measurements in such a way that different datasets could be compared.…”

Section: Methodsmentioning

confidence: 97%

“…The resulting microtopographic information was thereafter used to determine the sedimentation and/or scour erosion knickpoint in the profile, and to consequently perform measurement of eroded soil at specific distances so as to consider exclusively sheet erosion. This distance needs to be taken into account as ground surface is lowered irregularly as a result of erosion and consequently may result either in an overestimation or underestimation of real erosion rates (Ballesteros‐Cánovas et al ., ; Bodoque et al ., ). Subsequently, the perpendicular cross sections were exported to a spreadsheet file format, in order to statistically compare the TLS profiles with those obtained from microprofiling.…”

Section: Methodsmentioning

confidence: 97%

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Quantifying Soil Erosion from Hiking Trail in a Protected Natural Area in the Spanish Pyrenees

et al. 2017

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Recreational activities may impose adverse impacts on the environment of natural landscapes and protected areas owing to persistent tourist influx. Here, we use a dendrogeomorphic approach to estimate soil erosion induced by hikers at trails in the Ordesa and Monte Perdido National Park (north‐eastern Spain). For the first time, exposed roots of Pinus uncinata Ramond ex DC and Fagus sylvatica L. were used on the Iberian Peninsula to reconstruct the timing and amount of soil erosion induced by hikers based on dendrogeomorphology. In addition, we propose a new characterization of ground microtopography using a microtopographic profile gauge and validate results of this approach with 3D point clouds derived from terrestrial laser scanning. Determination of the first year of root exposure was based on the analysis of changes in roots, at both the macroscopic and tissue levels. Analysis shows that a distinctive footprint is observable at macroscopic and microscopic scales following initial exposure and thus confirms results of previous work realized with roots of other tree species (e.g. Pinus sylvestris L.). Our results also indicate that a characterization of erosion based on microtopographic profiles can replace terrestrial laser scanning measurements, which are often difficult to obtain in remote areas. Estimates of soil erosion ranged between 3·1 ± 1·5 and 8·9 ± 4·3 mm y−1 (or 52·7 ± 25·5 to 151·3 ± 73·1 t ha−1 y−1). The approach deployed here could help improve management of and access to natural protected areas and thus reduce the potentially negative impacts of recreational activities on these sensitive environments. Copyright © 2017 John Wiley & Sons, Ltd.

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“…(), Bodoque et al . () or Ballesteros‐Cánovas et al . () and underline the importance of proper ground microtopography.…”

Section: Discussionmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 97%

See 2 more Smart Citations

Quantifying Soil Erosion from Hiking Trail in a Protected Natural Area in the Spanish Pyrenees

et al. 2017

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“…Recently, other uncertainties regarding tree roots exposure data using in erosion studies were pointed out [see e.g. 42].…”

Section: Discussionmentioning

confidence: 99%

Dynamics of gully side erosion: a case study using tree roots exposure data

2016

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Erosion is a frequently studied natural process. Unfortunately, detailed analysis mostly requires longterm field monitoring or detailed digital elevation models (DEM) which are still absent for many areas. For these reasons we used the dendrogeomorphic method, a valuable tool for erosion analysis. The slopes of a~220 m long gully close to the Kozárovce village (Slovakia) were the object of our study. We analyzed 53 tree root samples coming from 16 broad-leaved trees of different species. 23 erosion event years were explored during the reconstruction period AD 1972-2013. The mean erosion rate E R was 1.00 cm/year. We were able to create four erosion patterns of slope erosion based on subsequent exposure of different parts of root. These erosion patterns serve as a base for a model of gully cross profile development. The highest values of erosion rate were reconstructed in the lowest parts of gully slopes. The gully sides formed by volcanic rocks are affected by lateral retreat here. Upward erosion dominates in the middle parts of slopes in loess, and downward erosion in the highest parts of the slopes.

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Quantification of cliff retreat in coastal Quaternary sediments using anatomical changes in exposed tree roots

Lopez-Saez

Corona

Morel

et al. 2018

Earth Surf Processes Landf

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Sea cliffs represent 80% of the world's coasts and can be found virtually in all types of morphogenetic environments. Most studies on rocky environments focused on the impacts of modern sea level rise on cliff stability derived from sequential surveys, direct measurements or erosional features in anthropogenic structures. In this study, we explore the potential of dendrogeomorphic techniques to quantify multidecadal changes in coastal environments on Porquerolles Island (France). We sampled a total of 56 cross‐sections from 16 Pinus halepensis Mill. roots growing on former alluvial deposits and on sandy‐gravelly cliffs to quantify mean annual cliff retreat rates as well as changes in cliff geometry. Anatomical changes in roots have been used successfully in the past to quantify continuous denudation rates on slopes, channel incision and gullying processes but the approach has not been used so far in a coastal cliff context. At Porquerolles Island, reconstructed rates of cliff retreat cover 30–40 years and show average erosion rates between 0.6 and 3.9 cm yr−1 (average: 2.1 cm yr−1). Highest rates are observed at Pointe de la Tufière (2.6–3.9 cm yr−1), a small rock promontory that is more exposed to wave and storm surges than the remainder of the study area. By contrast, lower erosion rates are recorded at cliffs protected by the La Courtade pocket beach (0.6–1.9 cm yr−1). This contribution demonstrates that dendrogeomorphic analyses of roots clearly have a significant potential and that they are a powerful tool for the quantification of multidecadal rates of cliff retreat in areas where measurements of past erosion are lacking. More specifically, the approach also has clear advantages over the shorter time series obtained with repeat monitoring (e.g. terrestrial laser scanning, sensors, erosion pins) or over longer, but more coarsely resolved records obtained from aerial photographs or radio‐nuclides. © 2018 John Wiley & Sons, Ltd.

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Source of error and uncertainty in sheet erosion rates estimated from dendrogeomorphology

Cited by 27 publications

References 32 publications

Quantifying Soil Erosion from Hiking Trail in a Protected Natural Area in the Spanish Pyrenees

Quantifying Soil Erosion from Hiking Trail in a Protected Natural Area in the Spanish Pyrenees

Dynamics of gully side erosion: a case study using tree roots exposure data

Quantification of cliff retreat in coastal Quaternary sediments using anatomical changes in exposed tree roots

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