Litter dams and microterraces formed on hillslopes subject to rainwash in the Sydney Basin, Australia

Mitchell, P. B.; Humphreys, Geoff S.

doi:10.1016/0016-7061(87)90052-8

Cited by 34 publications

(24 citation statements)

References 15 publications

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“…The importance of bioturbation in tile movement was inferred by Mitchell and Humphreys (1987) following the fi rst recovery of the Cattai tiles in 1982. Humphreys and Mitchell (1983) also suggested that Young pit observations at both sites indicated real upslope movement due to root growth or other biological activity, and a 17-year dyed soil column experiment at Cattai -in which the orientation of displaced soil revealed no preferred direction of transport -demonstrated the capability of bioturbation to cause random transport in the profi le (Humphreys and Field, 1998).…”

Section: Discussion: Bioturbation As a Mechanism In Tile Movementmentioning

confidence: 99%

“…Complete overturning of tiles (i.e. any tile found glossy-side-down) increased at Cordeaux from close to zero at both lines in 1982 (2% of tiles overall, or 6% if highly tilted tiles are included; Mitchell and Humphreys, 1987) to one-third of tiles at Cor-1 and one-quarter of tiles at Cor-2 by 2006 (Table II). In contrast, 16% of tiles at Cattai were overturned by 1982 and, despite further rotation of these and other tiles before and after the 1996 data collection, the proportion overturned remained reasonably constant as of 2006.…”

Section: Overturningmentioning

confidence: 93%

“…Aspects of the fi rst three years of this investigation have been previously published (Humphreys and Mitchell, 1983;Mitchell and Humphreys, 1987) but here we outline key results and conclusions following 27 years (further details are contained in Richards, 2009a). Over this time, its two study sites have been used in a comprehensive suite of bioturbation studies (e.g.…”

Section: Introductionmentioning

confidence: 96%

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Burial and turbulent transport by bioturbation: a 27‐year experiment in southeast Australia

Richards

Humphreys

2010

Earth Surf Processes Landf

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In order to assess the net effect and relative importance of geomorphic processes at two natural woodland sites in southeast Australia, 100 small tiles were placed on the soil surface in 1979 and their movement was monitored over the course of nearly three decades. Rates of tile burial and other tile displacement were considerable but also markedly random, being largely inconsistent with expected patterns of displacement by orthodox creep and rainwash processes. This included substantial upslope displacement and burial depths that ranged from zero to 5 cm. We suggest that such turbulent transport in the topsoil has mostly been caused by the direct and indirect transfer of soil and clasts by animals and plants (i.e. bioturbation). In addition to direct evidence of biota interacting with tiles, the effectiveness of bioturbation at our sites has been well established and the overall tile burial rate of 0·25 to 0·4 mm yr −1 is comparable to rates of surface mounding. Patterns of tile movement are generally consistent with soils-geomorphic theory regarding the biomantle and bioturbation-driven stonelayer formation, and provide further evidence that soil transfer and slope movement, in many situations, are markedly random and complex processes.

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Section: Discussion: Bioturbation As a Mechanism In Tile Movementmentioning

confidence: 99%

Section: Overturningmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 96%

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Burial and turbulent transport by bioturbation: a 27‐year experiment in southeast Australia

Richards

Humphreys

2010

Earth Surf Processes Landf

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“…Research on vegetation that influenced the IVB concept include banded vegetation [20], litter micro-terraces [7,8], vegetation filter strips [11,21], and contour bund layouts as used by some innovative farmers [22,23]. The particular design applied in this study is adapted from earlier work by J.G.…”

Section: Conceptual Modelmentioning

confidence: 99%

“…In native woodlands, rain infiltration rate, soil water storage capacity and soil biological activity can vary with changes in accumulated litter and soil organic matter [5,6]. While these processes occur naturally in many native ecosystems (e.g., [7,8]), they are often impaired in landscapes that support grazing and cropping land uses.…”

Section: Introductionmentioning

confidence: 99%

Modelling the Potential of Integrated Vegetation Bands (IVB) to Retain Stormwater Runoff on Steep Hillslopes of Southeast Queensland, Australia

Ryan

McAlpine

Ludwig

et al. 2015

Land

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Rainfall intensity is predicted to increase under a changing climate, leading to increased risks of hillslope erosion, downstream sedimentation and flooding. For many catchments used for grazing and agricultural land uses, it will become increasingly important to maintain ecohydrological functioning despite climatic extremes. One means to achieve this is through strategic reforestation using locally endemic species, in spatial configurations that effectively intercept, retain or and redistribute overland flows. This paper adopts a modelling approach for investigating the potential of one such design termed "integrated vegetation bands" (IVB), to increase the retention of runoff across steep hillslopes, particularly in the sub-tropics where rainstorms are becoming increasingly intense. A spatially distributed simulation model (MIKE-SHE) was applied to a steep, grazed catchment (Maronghi Creek catchment, Southeast Queensland, Australia) to compare stormwater runoff characteristics between: (1) the existing pasture land cover; and (2) a series of hypothetical IVB added across this pasture land. The IVB were approximately 20 m wide, and configured at 5% gradient towards ridgelines. Results for estimates of overland flow depth and infiltration (spatial), and accumulative water balance (temporal), confirm that OPEN ACCESSLand 2015, 4 712 the area of hillslope retaining > 10 mm/day more runoff increased by 22% under IVB compared to the pasture land use. Excluding the IVB themselves, the area of hillslope where runoff retention increased was 11%. During the most intense rainfall, IVB held up to 25% greater water depth and had 10% greater infiltration at the hillslope scale. At the sub-catchment scale, discharge decreased by 7% and infiltration increased by 23%. The findings for sub-tropical landscapes presented here are consistent with studies conducted in temperate regions. Based on the results of this preliminary modelling work, the IVB concept has been established as a paired-catchment field trial in a high rainfall catchment in Southeast Queensland, Australia.

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Changes in hydrology, sediment loss and microtopography of a vegetated mine waste rock dump impacted by fire

Evans

Saynor²,

Willgoose

1999

Land Degrad. Dev.

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Litter dams and microterraces formed on hillslopes subject to rainwash in the Sydney Basin, Australia

Cited by 34 publications

References 15 publications

Burial and turbulent transport by bioturbation: a 27‐year experiment in southeast Australia

Burial and turbulent transport by bioturbation: a 27‐year experiment in southeast Australia

Modelling the Potential of Integrated Vegetation Bands (IVB) to Retain Stormwater Runoff on Steep Hillslopes of Southeast Queensland, Australia

Changes in hydrology, sediment loss and microtopography of a vegetated mine waste rock dump impacted by fire

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