More than one thousand references related to soil water repellency

Dekker, L.W.; DeBano, Leonard F.; Oostindie, K.; Elsen, Erik van den

doi:10.1016/b978-0-444-51269-7.50031-x

Soil Water Repellency 2003

DOI: 10.1016/b978-0-444-51269-7.50031-x

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More than one thousand references related to soil water repellency

L.W. Dekker¹,

Leonard F. DeBano

K. Oostindie³

et al.

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“…Water repellency is a natural phenomenon in soils that is variable in space and time. Based on a recent bibliography on water repellency (Dekker et al, 2003), more than 1000 studies to date have investigated or referred to water repellency (hydrophobicity) in soils. Studies reporting the presence of repellency have come from a wide range of soil types and environments, and studies on wildfire-affected regions have been particularly common, followed with decreasing frequency by those from other types of permanently vegetated, tilled arable, and certain types of contaminated land.…”

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confidence: 99%

Hydrological effects of soil water repellency: on spatial and temporal uncertainties

Doerr

Moody

2004

Hydrological Processes

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Water repellency is a natural phenomenon in soils that is variable in space and time. Based on a recent bibliography on water repellency (Dekker et al., 2003), more than 1000 studies to date have investigated or referred to water repellency (hydrophobicity) in soils. Studies reporting the presence of repellency have come from a wide range of soil types and environments, and studies on wildfire-affected regions have been particularly common, followed with decreasing frequency by those from other types of permanently vegetated, tilled arable, and certain types of contaminated land. However, it is interesting to note that a detailed examination of the hydrological effects of water repellency is often not included especially as spatial scales increase. For example, infiltration and runoff processes at plot-or hillslope-scales have been investigated in less than 10% of studies, and at the catchment scale in less than 3% studies. Furthermore, these studies have by no means all unequivocally demonstrated connections between repellency and hydrological effects.Despite this apparent knowledge gap, it is increasingly common to promote water repellency as a factor in explaining hydrological responses such as irregular wetting, preferential flow within the soil matrix, and reduced infiltration and enhanced overland flow for unsaturated conditions at a range of scales, which in turn are often quoted as promoting slopewash, and rill and gully erosion. For anyone observing the wetting behaviour (or lack thereof) of a highly repellent soil in the laboratory or in the field, it is easy to visualize how this phenomenon must certainly bear significant hydrological implications at a range of spatial and temporal scales. The implied connections, however, need to be demonstrated; in attempting this, the key question that arises is at what spatial and temporal scales the connections between water repellency and the hydrological response are negligible and at what scales they are significant. Spatial UncertaintiesThe volume of soil affected by water repellency can be highly variable at a wide range of spatial scales. At the large horizontal scale (i.e. extending across different land-use types), the more extreme levels of repellency, at least, have been shown to be associated with certain land uses. Within a given land-use type prone to repellency, Apart from the spatial variability of repellent soil itself, additional spatially variable factors may influence the hydrological consequences of repellency. For example, the variability of macropores (e.g. root channels, animal burrows) will affect infiltration and water movement in repellent terrain (Burch et al., 1989), and the variations in the storage capacity of the canopy, litter and duff layers will determine how much water will be delivered to the soil surface during a rainfall event, which in itself is likely to be spatially variable. In considering the effects of these additional factors, it may be critical whether or not their spatial variability is organized into patterns or is ...

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confidence: 99%

Hydrological effects of soil water repellency: on spatial and temporal uncertainties

Doerr

Moody

2004

Hydrological Processes

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More than one thousand references related to soil water repellency

Cited by 1 publication

References 558 publications

Hydrological effects of soil water repellency: on spatial and temporal uncertainties

Hydrological effects of soil water repellency: on spatial and temporal uncertainties

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