Slope aspect, slope length and slope inclination controls of shallow soils vegetated by sclerophyllous heath—links to long-term landscape evolution

Wilkinson, Marshall T.; Humphreys, Geoff S.

doi:10.1016/j.geomorph.2005.11.011

Cited by 32 publications

(25 citation statements)

References 42 publications

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“…Slope aspect appears to significantly influence erosion rates (Wilkinson and Humphreys 2006). Besides its impact on underlying characteristics (e.g., hydrothermal status, vegetation cover and soil development), wind-driven rainfall erosion cannot be neglected and has been given much attention to in recent years (e.g., Vieira et al 2004;Foulds and Warburton 2007;Erkal et al 2012;Fister et al 2012).…”

Section: Slope Aspect and Wind-driven Rainfall Erosionmentioning

confidence: 99%

“…Soil erosion is the most important land degradation problem worldwide and is controlled by climatic characteristics, land topography, soil properties, vegetation, and land management (Ethiopia 2001;Ramos and Martínez-Casasnovas 2006;Wilkinson and Humphreys 2006;Martínez-Murillo et al 2013). Slope characteristics, including the aspect, gradient, length, and curvature of the slope, are crucially important in influencing soil erosion and act as important independent variables in many soil erosion models (e.g., ULSE, AGNPS, and ANSWERS) (Merritt et al 2003).…”

Section: Introductionmentioning

confidence: 99%

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Aspect-induced differences in soil erosion intensity in a gullied hilly region on the Chinese Loess Plateau

Fang

Guo

2015

Environ Earth Sci

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Slope aspect exerts important influence on soil erosion intensity and geomorphologic evolution of land surfaces. Using a digital elevation model (DEM 2 m 9 2 m resolution) the gully development intensity in the Wangjiagou catchment on the Chinese Loess Plateau is found to vary as a function of aspect-induced differences in topoclimate. The sunny slopes (i.e., SW, S, and SE aspects) have higher gully erosion intensity than that on the shady slopes (i.e., NE, N, and NW aspects), indicating that southfacing slopes experience faster geomorphic evolution. Variations in process activity can be explained in large part by aspect-induced differences in soil temperature, soil moisture and transpiration, wind force, vegetation coverage and land use pattern on different slope aspects. Lower vegetation coverage and more intensive agricultural activity cause increased erodibility on the sunny slopes. Wind-driven rainstorms can partly explain the higher soil erosion intensity for the sunny slopes, while the impact of mass movement on different slopes is minor. The combination of these factors leads to different soil erosion intensities and geomorphic evolutions on different slopes in the hilly loess region of the Chinese Loess Plateau.

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Section: Slope Aspect and Wind-driven Rainfall Erosionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aspect-induced differences in soil erosion intensity in a gullied hilly region on the Chinese Loess Plateau

Fang

Guo

2015

Environ Earth Sci

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“…The Newnes records pick up the end of the long-term drought (1939)(1940)(1941)(1942)(1943)(1944)(1945)(1946)(1947)(1948) followed by a mild period, but with increasing dryness from 1990 to 1998. Since 1998 drought conditions continued into the mid to late 2000s, followed by higher rainfall in 2011-2012. Recent work on the geomorphology of the area indicates that during the Last Glacial Maximum (LGM) c. 20 000 years bp, the climate was much drier and the Plateau vegetation was likely to have been treeless (Hesse et al 2003, Wilkinson et al 2005, Wilkinson & Humphreys 2006. With warming climates, swamps began development about 12-14 000 years ago and have been a feature of the vegetation of the Plateau for at least the last 12 000 years (Chalson & Martin 2009).…”

Section: Locationmentioning

confidence: 99%

Vegetation, fauna and groundwater interrelations in low nutrient temperate montane peat swamps in the upper Blue Mountains, New South Wales.

Benson¹,

Baird²

2012

Cunninghamia

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Newnes Plateau Shrub Swamps are a series of low nutrient temperate montane peat swamps around 1100 m elevation in the upper Blue Mountains, west of Sydney (lat 33° 23' S; long 150° 13'E). Transect-based vegetation studies show a closely related group of swamps with expanses of permanently moist, gently sloping peatlands. Vegetation patterns are related to surface hydrology and subsurface topography, which determine local peat depth. While there is evidence that a group of the highest elevation swamps on the western side of the Plateau are more dependent on rainwater, the majority of swamps, particularly those in the Carne Creek catchment, and east and south of it, may be considered primarily groundwater dependent with a permanently high watertable maintained by groundwater aquifers. An integral part of the swamps are a number of threatened groundwater dependent biota (plants-Boronia deanei subsp. deanei, Dillwynia stipulifera, dragonfly-Petalura gigantea, lizard-Eulamprus leuraensis), which are obligate swamp dwellers. This association of dependence leaves the entire swamp ecosystem highly susceptible to threats from any loss of groundwater, the current major one being the impact of damage to the confining aquicludes, aquitards, aquifers and peat substrates as a result of subsidence associated with longwall mining. Impacts on the swamps may also result from changes to hydrology through damming of creeks, mine waste water discharge, increased moisture competition from pine plantations, recreational motorbike and off-road vehicle tracks and climate change.If these groundwater dependent ecosystems do not receive protection from activities such as longwall mining subsidence, significant ecological damage is unlikely to be avoided or able to be mitigated even where provisions of the Commonwealth Environment Protection and Biodiversity Conservation and NSW Threatened Species Conservation Acts apply to groundwater dependent swamps and biota. The importance of the highest elevation part of the Plateau for a number of restricted (some endemic) plant species is also discussed.

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“…Therefore the virtual points are located in the pole region as long as inclination is low which leads to small (virtual) distances between them. The idea behind is that solar radiation; wind or other factors highly depending on aspect and inclination (Wilkinson & Humphreys, 2006) are not considerably different on plots with varying aspects as long as inclination is low. The longitude values on the unit sphere are derived from the directional reference made in the field.…”

Section: Slope and Aspectmentioning

confidence: 99%

Spatial Patterns of Phytodiversity - Assessing Vegetation Using (Dis) Similarity Measures

Babar¹,

Amarnath²,

Reddy³

et al. 2011

The Dynamical Processes of Biodiversity - Case Studies of Evolution and Spatial Distribution

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Slope aspect, slope length and slope inclination controls of shallow soils vegetated by sclerophyllous heath—links to long-term landscape evolution

Cited by 32 publications

References 42 publications

Aspect-induced differences in soil erosion intensity in a gullied hilly region on the Chinese Loess Plateau

Aspect-induced differences in soil erosion intensity in a gullied hilly region on the Chinese Loess Plateau

Vegetation, fauna and groundwater interrelations in low nutrient temperate montane peat swamps in the upper Blue Mountains, New South Wales.

Spatial Patterns of Phytodiversity - Assessing Vegetation Using (Dis) Similarity Measures

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