A tracer budget quantifying soil redistribution on hillslopes after forest harvesting

Wallbrink, Peter; Roddy, Brendan; Olley, Jon

doi:10.1016/s0341-8162(01)00185-0

Cited by 78 publications

(59 citation statements)

References 28 publications

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“…This is why we used bulk density, penetration resistance, shear resistance and soil porosity for measuring soil compaction. In agreement with the results of previous studies (Wang et al 1997, Williamson & Neilsen 2000, Wallbrink et al 2002, Han et al 2009), our findings showed that the investigated physical parameters of soil were significantly affected mainly by the first vehicle passes (comparison between Time 1 and Time 2). Further machine passes slightly increased or did not affect soil physical parameters.…”

Section: Discussionsupporting

confidence: 93%

Estimating machine impact on strip roads via close-range photogrammetry and soil parameters: a case study in central Italy

Cambi¹,

Giannetti²,

Bottalico³

et al. 2018

iForest

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Several studies have been carried out to investigate soil compaction and rutting after logging vehicle traffic, based on time consuming and punctual field measurements. The objective of this study was to measure soil disturbances with two methods: (i) a new, image-based models derived by a structure-frommotion (SfM) photogrammetry approach; and (ii) a traditional soil sampling (bulk density and shear strength). Two trails were selected in a logging area (central Italy), one trafficked by a forwarder (FT) and one trafficked by a skidder (ST). Data collection was conducted before, during and after timber extraction. Image-based models derived by SfM photogrammetry was used to highlight the differences in the shape and distribution of the disturbances along ST and FT. Results showed that the physical parameters of soil significantly changed due to both FT and ST traffic. Machine passes increased bulk density (111% and 31% for FT and ST, respectively), penetration resistance (29% and 24% for FT and ST, respectively) and shear resistance (14% and 6% for FT and ST, respectively), whereas porosity decreased (46% and 9% for FT and ST, respectively). Significant differences between FT and ST were found when comparing ruts removal and bulges with SfM photogrammetry. After logging, FT clearly showed ruts and bulges, whereas in ST ruts and bulges were not visible, but soil displacement in the direction of extraction was evident and measurable. Nevertheless, although our result shows a larger soil disturbance caused by forwarders than skidders, it is not possible to draw any general conclusions about differences between the two machines. Data about the machine passes, or the wood volumes transported over each trial area were not available; therefore, any general conclusion is misleading. SfM photogrammetry give information not available via traditional methods, thus improving impact assessment.

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Section: Discussionsupporting

confidence: 93%

Estimating machine impact on strip roads via close-range photogrammetry and soil parameters: a case study in central Italy

Cambi¹,

Giannetti²,

Bottalico³

et al. 2018

iForest

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“…In the present study maximum bulk density occurred on curves especially when the cross slope was high (Ezzati et al 2015;Safari et al 2016). The effect of increasing soil bulk density on root growth largely depends on the skidder traffic and soil wetness when the machine is used (Wallbrink et al 2002). In this research the skidder passes did not affect the root growth.…”

Section: Discussionsupporting

confidence: 43%

Effect of the skid trail cross section and horizontal alignment on forest soil physical properties

Yazarlou¹,

Parsakhoo²,

Habashi³

et al. 2017

J. For. Sci.

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Yazarlou H., Parsakhoo A., Habashi H., Soltauninejad S.A. (2017): Effect of the skid trail cross section and horizontal alignment on forest soil physical properties. J. For. Sci., 63: 161-166.Horizontal alignment and cross section characteristics of a skid trail in a ground-based skidding system including curves, wheel ruts and cross slope can impact on the forest soil. In this study the measurement of cross section and vertical alignment of skid trail in Bahramnia forestry plan was done using a levelling instrument. Horizontal alignment of skid trail including straight routes and curves was taken using polar methods. A 3D map of skid trail was produced in AutoCAD Civil3D software. Soil bulk density was measured after sampling the soil with a core sampler. Results showed that in straight routes, soil bulk density increased by increasing the cross slope of skid trail. Moreover, soil porosity decreased with the increasing cross slope. There was a significant difference between cross slopes in soil moisture. On curves, maximum bulk density occurred when the cross slope was 10%. Findings about soil porosity and moisture on curves of skid trails were similar to those of straight routes. Based on our findings, soil bulk density in wheel ruts was significantly lower than that in the middle part of skid trail. Soil bulk density in the silty soil texture of studied skid trails was a little more than ideal bulk density, so it cannot affect and restrict root growth.

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“…Ulery and Graham, 1993;Wallbrink et al, 2002). The approach assumes that the reference samples represent the integrated effects of heterogeneous erosion occurring across the unit.…”

Section: Experimental Designmentioning

confidence: 99%

Magnetic enhancement in wildfire‐affected soil and its potential for sediment‐source ascription

Blake

Wallbrink

Doerr

et al. 2005

Earth Surf Processes Landf

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Intense rainfall following wildfire can cause substantial soil and sediment redistribution. With concern for the increasing magnitude and frequency of wildfire events, research needs to focus on hydrogeomorphological impacts of fire, particularly downstream fluxes of sediment and nutrients. Here, we investigate variation in magnetic enhancement of soil by fire in burnt eucalypt forest slopes to explore its potential as a post-fire sediment tracer. Lowfrequency magnetic susceptibility values (χ χ χ χ χ lf

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A tracer budget quantifying soil redistribution on hillslopes after forest harvesting

Cited by 78 publications

References 28 publications

Estimating machine impact on strip roads via close-range photogrammetry and soil parameters: a case study in central Italy

Estimating machine impact on strip roads via close-range photogrammetry and soil parameters: a case study in central Italy

Effect of the skid trail cross section and horizontal alignment on forest soil physical properties

Magnetic enhancement in wildfire‐affected soil and its potential for sediment‐source ascription

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