Results 191 to 200 of about 9,204 (241)

Water Repellent Soils

2018
Capillary forces in unsaturated soils depend on the surface tension of water, the dimensions of soil pores and on the contact angle of the interfaces of the solid phase of soil (soil matrix) and liquid water. The contact angle (angle of wetting) is assumed to be zero, but in real soils is higher, depending on the properties of the thin surface layer ...
Viliam Novák, Hana Hlaváčiková
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USEFUL SOIL-WATER REPELLENCY INDICES

Soil Science, 2008
Water repellency (WR) has been classically characterized at fixed (usually oven-dry) soil water content (θ g ) in terms of the soil water contact angle (CA), a. However, a has been previously reported to depend upon θ g in a nonlinear fashion, such that WR increases from a wettable state close to saturation (θ g-min ) up to a maximum, α max ...
Regalado, C M, Ritter, Axel, de Jonge, Lis Wollesen, Kawamoto, Ken, Komatsu, Toshiko, Moldrup, Per   +5 more
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Manure-Induced Soil-Water Repellency

Soil Science, 2011
AbstractThis laboratory study was conducted to evaluate the potential of nine manure samples from dairy (n = 7), beef (n = 1), and swine (n = 1) to cause water repellency (WR) in six soils; in addition, the duration of WR in two soils was assessed in an incubation study.
Paulo H. Pagliari, Mario L. Flores-Mangual, Birl Lowery, Dwight G. Weisenberger, Carrie A. M. Laboski   +4 more
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Post‐fire Soil Water Repellency

Soil Science Society of America Journal, 2004
Fire‐induced soil water repellency is a key control on post‐fire runoff and erosion rates, but there are few data on the persistence of soil water repellency and the soil moisture threshold at which water repellent soils become hydrophilic. This study used repeated sampling to quantify changes in soil water repellency over time and
Lee H. MacDonald, Edward L. Huffman
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Modeling infiltration into water repellent soil

2023
Infiltration is an important hydrological process impacting ecology, forestry, agronomy, civil- and environmental engineering. Most infiltration models assume soils to be “wettable”, i.e., water in the soil forming an effective contact angle with the soil matrix that is close to zero.
Markus Berli, Rose Shillito
openaire   +1 more source

SOIL-WATER CONTENT DEPENDENCY OF WATER REPELLENCY IN SOILS

Soil Science, 2007
Water repellency (WR) of soils is a global phenomenon. It affects hydrological processes such as infiltration, preferential flow, and surface erosion. Although the soil WR varies nonlinearly with soil-water content (w), WR is often determined at one fixed soil-water content. For a coarse sandy soil, we provide a comparison of the whole WR-w curve under
Lis W. de Jonge, Per Moldrup, Ole H. Jacobsen   +2 more
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Relationship between the severity, persistence of soil water repellency and the critical soil water content in water repellent soils

Geoderma, 2014
Abstract Soil water repellency (SWR) causes reduced soil water storage and enhanced runoff and reduced ecosystem productivity. As such, characterization of SWR is a prerequisite for effective environmental management. The objectives of this study were to determine the relationship between the severity of SWR and its persistence and to determine the ...
Chau, Henry, Biswas, A, Vujanovic, V, Si, BC   +3 more
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Microplastic enhances water repellency of soils

2020
<p>Soils are the largest sink of microplastic particles (MPP) in terrestrial ecosystems. However, there is little knowledge on the implication of MPP contaminating soils. In particular, we don’t know how MPP move and, on the other hand, how they affect soil hydraulic properties and soil moisture dynamics.</p ...
Andreas Cramer, Ursula Bundschuh, Pascal Bernard, Mohsen Zarebanadkouki, Andrea Carminati   +4 more
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Analyzing soil water repellency phenomena

2007
Benetzungsgehemmte Böden können weltweit gefunden werden. Benetzungshemmung in Böden verursacht eine räumliche Variabilität der Bodenfeuchte und einen höheren Oberflächenabfluss. Sie hat einen Einfluss auf die Formierung von präferenziellen Fließwegen und damit auf den Stofftransport und die Grundwasserneubildung aber auch auf das Pflanzenwachstum. Das
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Infiltration in water repellent soil

2010
Observations made at Goat Meadows - a small sub-alpine basin located near Pemberton, British Columbia -demonstrated that a layer which is either water repellent or has only a limited affinity for water is present at most vegetated sites. The layer is typically a few centimetres in thickness, and is usually located at or near the top of the profile: it ...
openaire   +1 more source