Erosion regulation as a function of human disturbances to vegetation cover: a conceptual model

Vanacker, Veerle; Bellin, Nicolas; Molina, Armando; Kubik, Peter W.

doi:10.1007/s10980-013-9956-z

Cited by 74 publications

(71 citation statements)

References 42 publications

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“…This difference was due to the under-representation of extreme events in the contemporary record (Covault et al, 2013;Kirchner et al, 2001), or elevated long-term erosion rates due to enhanced sediment production in previous glacial cycles (Delunel et al, 2010;Schaller et al, 2001). The studies that calculated contemporary erosion rates significantly higher than long-term TCN derived erosion all attributed the response to land use change (Gellis et al, 2004;Hewawasam et al, 2003;Siame et al, 2011;Vanacker et al, 2014). This study is the first of its kind in Australia to demonstrate positive AEF values for large subcatchments.…”

Section: Comparison Of Results With Other Studiesmentioning

confidence: 83%

“…Two main differences are apparent between the approach used in this study and that of Vanacker et al, (2014). Firstly, in this study, we do not use the term human, as without additional data that can age the sediments, we cannot conclusively say that all of the change has been due to human activity and not partially influenced by changes in climate (e.g.…”

Section: Calculation Of the Accelerated Erosion Factor (Aef)mentioning

confidence: 93%

“…Lough et al, 2015). Secondly, the EC rates in this study are derived from instantaneous measurements of sediment flux, whereas Vanacker et al, (2014) derived estimates of the contemporary erosion rates from sedimentation in small dams and reservoirs.…”

Section: Calculation Of the Accelerated Erosion Factor (Aef)mentioning

confidence: 99%

“…These erosion rates can be used to benchmark short-term anthropogenically accelerated soil erosion and fill the gap between the contemporary (~100 year) and geological (~100 to >10,000 years) time scales (Heimsath, 2006;von Blanckenburg, 2005;Wasson, 2012). Increasingly, studies are combining erosion rates derived from TCN with data of contemporary sediment flux from check dams (Vanacker et al, 2014;Vanacker et al, 2007) or sediment loads (Brown et al, 1998;Gellis et al, 2004;Hewawasam et al, 2003;Siame et al, 2011) to quantify the contribution of human activity against the natural variability of landscape sediment yields (von Blanckenburg, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Combining contemporary and long-term erosion rates to target erosion hot-spots in the Great Barrier Reef, Australia

et al. 2015

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Highlights This paper presents the first non-modelled estimates of contemporary measured erosion rates against background long term erosion rates in the Great Barrier Reef (GBR) catchments. Using an accelerated erosion factor (AEF), this study has highlighted that there are very specific 'hot-spot' areas that warrant priority treatment in terms of catchment remediation (Bowen sub-catchment, Upper Burdekin sub-catchment and low cover grazing areas). Due to the large intra-catchment variability of erosion in space and time, this study highlights that having a single end of catchment water quality target is inappropriate. Sub-catchment monitoring and evaluation is more suitable. The erosion rates presented in this paper represent a more robust way to 'bench-mark' current erosion rates compared with the current water quality 'targets'. AbstractMethods for prioritising catchment remediation are based on understanding the source of sediment over the short-medium timescales (10-10 2 years) using techniques such as sediment finger-printing, sediment flux monitoring, and catchment modelling. Because such approaches do not necessarily quantify the natural variation in sediment flux over the longer timescale, they often represent background or pre-agricultural erosion rates poorly. This study compares long-term (~100 to >10,000 years) erosion rates derived from terrestrial cosmogenic nuclides ( 10 Be) with contemporary erosion rates obtained by monitoring sediment fluxes over ~5-10 years. The ratio of these two data sets provides a measure of the accelerated erosion factor (AEF), which can be used to identify erosion hot-spots at the sub-catchment scale. The study area is the Burdekin catchment, the largest source of contemporary sediment to the Great Barrier Reef lagoon. Long-term erosion rates vary from <0.0077 mm yr -1 in the Suttor and Belyando subcatchments to 0.0296 mm yr -1 in the Bowen. The contemporary erosion rates are highest on small hillslopes with patchy ground cover (0.2726 mm yr -1 ) and in the Bowen sub-catchment (0.2207 mm yr -1 ), and lowest in the Belyando sub-catchment (0.0019 mm yr -1 ). All but two of the sub-catchment sites have an AEF > 1.0, indicating higher contemporary erosion rates than estimated long-term averages. Results confirm that the contemporary or agriculturally-induced erosion rates at these sites have increased considerably. Within the context of the Reef Water Quality Protection Plan, these results provide justification for water quality targets to be set at the sub-catchment scale, particularly for large and geomorphically diverse catchments.

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Section: Comparison Of Results With Other Studiesmentioning

confidence: 83%

Section: Calculation Of the Accelerated Erosion Factor (Aef)mentioning

confidence: 93%

Section: Calculation Of the Accelerated Erosion Factor (Aef)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Combining contemporary and long-term erosion rates to target erosion hot-spots in the Great Barrier Reef, Australia

et al. 2015

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“…Anthropogenic landscapes cover a great deal of the Earth's surface [25,26], and in such landscapes, direct anthropogenic disturbances of surface morphology and processes are significant [27][28][29]. Coal mining activities can have a significant impact on the geomorphology and hydrology of catchments, both during mining and for many years after their cessation [29,30].…”

Section: Introductionmentioning

confidence: 99%

Areal Change Detection and 3D Modeling of Mine Lakes Using High-Resolution Unmanned Aerial Vehicle Images

Yücel

Turan

2016

Arab J Sci Eng

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This study focuses on the Etili and Comakli openpit coal mines, where mine lakes are most densely located within the Can Coal Basin (northwestern Turkey). The aim of our study was to create 3D terrain models of these mine lakes using high-resolution images from an unmanned aerial vehicle (UAV) and to quantify areal changes linked to anthropogenic and meteorological effects over the study period. In November 2014 and October 2015, a DJI F550 hexacopter was flown at elevations of 30-100 m, and images were acquired using a 12-megapixel camera. Nineteen flights were completed, with each flight acquiring between 109 and 554 images. 3D modeling of UAV images was carried out with Agisoft software, using the most common structure from motion algorithm. Its workflow, involving image matching, georeferencing, digital elevation modeling, orthomosaics, 3D point cloud, and 3D textured model creation, was used to generate our 3D terrain model for the mine lakes. Orthomosaics with 1-6 cm/pixel resolution were used to assess areal change in the mine lakes. Area was calculated using two different methods (digitization and classification) within the ArcGIS package; results of these two methods were compared. Our UAV study of open-pit mines rapidly and precisely determined changes in topography linked to anthropogenic and meteorological effects. It also proved to be an effective method of visualizing such effects over the short term.

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Kinetically limited weathering at low denudation rates in semiarid climatic conditions

et al. 2016

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Biogeochemical cycling within the Critical Zone depends on the interactions between minerals and fluids controlling chemical weathering and physical erosion rates. In this study, we explore the role of water availability in controlling soil chemical weathering in semiarid climatic conditions. Weathering rates and intensities were evaluated for nine soil profiles located on convex ridge crests of three mountain ranges in the Spanish Betic Cordillera. We combine a geochemical mass balance with 10 Be cosmogenic nuclides to constrain chemical weathering intensities and long-term denudation rates. As such, this study presents new data on chemical weathering and 10 Be-derived denudation for understudied semiarid climate systems. In the Betic Cordillera, chemical weathering intensities are relatively low (~5 to 30% of the total denudation of the soil) and negatively correlated with the magnitude of the water deficit in soils. Chemical mass losses are inversely related to denudation rates (14-109 mm/kyr) and positively to soil thickness (14-58 cm); these results are consistent with kinetic limitation of chemical weathering rates. A worldwide compilation of chemical weathering data suggests that soil water balance may regulate the coupling between chemical weathering and physical erosion by modulating soil solute fluxes. Therefore, future landscape evolution models that seek to link chemical weathering and physical erosion should include soil water flux as an essential driver of weathering. 2005;Brantley et al., 2007;Larsen et al., 2014]. However, in areas of sufficiently high physical erosion rates, reaction kinetics may limit weathering processes due to reduced mineral residence time as suggested by modeling and observational studies [e.g.

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Erosion regulation as a function of human disturbances to vegetation cover: a conceptual model

Cited by 74 publications

References 42 publications

Combining contemporary and long-term erosion rates to target erosion hot-spots in the Great Barrier Reef, Australia

Combining contemporary and long-term erosion rates to target erosion hot-spots in the Great Barrier Reef, Australia

Areal Change Detection and 3D Modeling of Mine Lakes Using High-Resolution Unmanned Aerial Vehicle Images

Kinetically limited weathering at low denudation rates in semiarid climatic conditions

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