Modeling soil seal as a nonuniform layer

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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Water Resources Research Wiley

Modeling soil seal as a nonuniform layer

Water Resources Research, Volume 25 (10) – Oct 1, 1989

Loading next page...
 
/lp/wiley/modeling-soil-seal-as-a-nonuniform-layer-5JHr5t0Cse
Publisher
Wiley
Copyright
Copyright © 1989 by the American Geophysical Union.
ISSN
0043-1397
eISSN
1944-7973
D.O.I.
10.1029/WR025i010p02101
Publisher site
See Article on Publisher Site

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.

Journal

Water Resources ResearchWiley

Published: Oct 1, 1989

References

  • An approximate method of estimating soil water diffusivity for different soil bulk densities
    Libardi, Libardi; Reichardt, Reichardt; Jose, Jose; Bazza, Bazza; Nielsen, Nielsen
  • A new model of predicting the hydraulic conductivity of unsaturated porous media
    Mualem, Mualem
  • Overland flow on an infiltrating surface
    Smith, Smith; Woolhiser, Woolhiser

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create folders to
organize your research

Export folders, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off