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פותח על ידי קלירמאש פתרונות בע"מ -
Modeling soil seal as a nonuniform layer
Year:
1989
Source of publication :
Water Resources Research
Authors :
אסולין, שמואל
;
.
Volume :
25
Co-Authors:
Mualem, Y.
Assouline, S.
Facilitators :
From page:
2101
To page:
2108
(
Total pages:
8
)
Abstract:
A quantitative conceptual model of soil sealing is proposed, based on the assumption that the compaction of the upper soil layer by raindrops and the “washed in” material result in a nonuniform change in bulk density, which can be approximated by an exponential function. The change in density causes in turn variations in soil properties, such as porosity, water retention, and hydraulic conductivity. Empirical functions are suggested to simulate the pattern by which these properties vary as dependent upon the density change. The model was calibrated using data of two experimental studies related to crust properties of three different soils: sandy loam, loam (loess), and clay loam. The model reproduced quite well the observed features of the experimental sealing characteristics. Seals developed in two different flow systems subjected to simulated rain were analyzed: (1) seal developed under saturated conditions over a shallow soil bed and (2) seal developed under unsaturated flow conditions. The proposed model highlights some soil parameters that are quite important and should be observed in soil sealing investigations. It also presents a basis for quantitative analysis of the soil sealing phenomenon in terms of measurable physical parameters. Copyright 1989 by the American Geophysical Union.
Note:
Related Files :
Modelling
nonuniform layer
raindrop
rainsplash
soil seal
עוד תגיות
תוכן קשור
More details
DOI :
10.1029/WR025i010p02101
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
23451
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:59
Scientific Publication
Modeling soil seal as a nonuniform layer
25
Mualem, Y.
Assouline, S.
Modeling soil seal as a nonuniform layer
A quantitative conceptual model of soil sealing is proposed, based on the assumption that the compaction of the upper soil layer by raindrops and the “washed in” material result in a nonuniform change in bulk density, which can be approximated by an exponential function. The change in density causes in turn variations in soil properties, such as porosity, water retention, and hydraulic conductivity. Empirical functions are suggested to simulate the pattern by which these properties vary as dependent upon the density change. The model was calibrated using data of two experimental studies related to crust properties of three different soils: sandy loam, loam (loess), and clay loam. The model reproduced quite well the observed features of the experimental sealing characteristics. Seals developed in two different flow systems subjected to simulated rain were analyzed: (1) seal developed under saturated conditions over a shallow soil bed and (2) seal developed under unsaturated flow conditions. The proposed model highlights some soil parameters that are quite important and should be observed in soil sealing investigations. It also presents a basis for quantitative analysis of the soil sealing phenomenon in terms of measurable physical parameters. Copyright 1989 by the American Geophysical Union.
Scientific Publication
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