Results 241 to 250 of about 42,791 (259)
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Soil Science and Plant Nutrition, 2008
Abstract The purpose of this study was to determine the effects of ambient relative humidity (RH) on contact angle and water drop penetration time (WDPT) using a series of sand samples hydrophobized with stearic acid. The contact angle was estimated using the sessile drop method.
D. A. L. Leelamanie +2 more
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Abstract The purpose of this study was to determine the effects of ambient relative humidity (RH) on contact angle and water drop penetration time (WDPT) using a series of sand samples hydrophobized with stearic acid. The contact angle was estimated using the sessile drop method.
D. A. L. Leelamanie +2 more
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Earth Surface Processes and Landforms, 1998
Two common methods to assess soil hydrophobicity are the ‘Water Drop Penetration Time’ and ‘Molarity of an Ethanol Droplet’ techniques. For these, uncertainty exists regarding the representativeness of laboratory tests reflecting field conditions, their replicability, and the comparability of results between the two techniques.
Stefan H Doerr
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Two common methods to assess soil hydrophobicity are the ‘Water Drop Penetration Time’ and ‘Molarity of an Ethanol Droplet’ techniques. For these, uncertainty exists regarding the representativeness of laboratory tests reflecting field conditions, their replicability, and the comparability of results between the two techniques.
Stefan H Doerr
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Earth Surface Processes and Landforms, 1988
AbstractSandy soils are often water repellent when dry. In sloping areas this may result in surface runoff and erosion. Water repellency in soils can be classified with the solid‐liquid contact angle which is difficult to determine. Another method is the water drop penetration time.
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AbstractSandy soils are often water repellent when dry. In sloping areas this may result in surface runoff and erosion. Water repellency in soils can be classified with the solid‐liquid contact angle which is difficult to determine. Another method is the water drop penetration time.
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Applied Surface Science, 2014
Abstract Droplet impingement experiments at low Weber numbers were conducted by digitizing silhouettes of impacting water drops onto unlike graphite substrates, typified by different advancing water contact angles ( θ a ): 140 and 160°. The relaxation of wetting diameter, dynamic contact angle, and drop shapes were measured.
Paola G. Pittoni +2 more
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Abstract Droplet impingement experiments at low Weber numbers were conducted by digitizing silhouettes of impacting water drops onto unlike graphite substrates, typified by different advancing water contact angles ( θ a ): 140 and 160°. The relaxation of wetting diameter, dynamic contact angle, and drop shapes were measured.
Paola G. Pittoni +2 more
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Automated Measurement of the Water Drop Penetration Time for the Analysis of Soil Water Repellency
In this work, we develop an innovative system for the automated measurement of Water Drop Penetration Time (WDPT) - a parameter that is conventionally used for evaluating soil water repellency (SWR). Increased SWR can be a reason for plant stress and poor crop yields, create a risk of potential water runoff and floods and thus can pose risks to life ...
Wang, Danxu
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Assessing the hydrophobic characteristics of soil is vital for understanding soil wettability or soil-water interactions, particularly in post-wildfire environments where water repellency can significantly impact ecosystem recovery, water infiltration, and erosion control.
Prakash, Mugundan
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Water Drop Penetration Time Revisited
2022<p>Water drop penetration time (WDPT), i.e. the time it takes for a water drop to be absorbed by the soil, is widely used as a measure of soil water repellency. Despite its popularity, little is known about the processes that govern WDPT and how WDPT is related to other soil hydraulic properties such as sorptivity.
Markus Berli +4 more
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International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1989
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