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Characterizing flow through the soil...

Sanders, Emily Christine.

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Characterizing flow through the soil matrix and preferential flow pathways (PFPs).

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Characterizing flow through the soil matrix and preferential flow pathways (PFPs)./
Author:	Sanders, Emily Christine.
Description:	160 p.
Notes:	Source: Masters Abstracts International, Volume: 49-01, page: 0249.
Contained By:	Masters Abstracts International49-01.
Subject:	Agriculture, Soil Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1479946
ISBN:	9781124162041

Characterizing flow through the soil matrix and preferential flow pathways (PFPs).
Sanders, Emily Christine.

Characterizing flow through the soil matrix and preferential flow pathways (PFPs). - 160 p.

Source: Masters Abstracts International, Volume: 49-01, page: 0249.

Thesis (M.S.)--Purdue University, 2010.

Using liquid latex as a method to seal preferential flow pathways (PFPs), this study attempted to (1) quantify the contribution of preferential flow to overall flow at various moisture contents, and (2) characterize the effect of preferential flow on soil moisture profiles to 60 cm in depth. Field research was conducted in silty clay loam soil under a no-till corn/soybean rotation field planted to corn. Surface intake rates were measured using a simplified falling head technique under two scenarios: (1) natural soil conditions with unaltered PFPs; and (2) similar soil conditions with latex-sealed PFPs. Further analysis of the latex recovered from the sealed PFPs was conducted in order to differentiate and quantify desiccation crack volumes from biological volumes. Results indicated that the contribution of preferential flow to surface intake rates varied from approximately 34 to 99% depending on the initial moisture content and volume of PFPs present. The moisture profiles in the latex treated frames collected after 1-2 days of water redistribution generally showed uniform increases in water content per 10 cm depth layer in the surface horizon compared to the background moisture profile. Sealing the PFPs with latex simulated Darcian-like flow conditions. Crack volumes decreased with depth while biological volumes remained fairly constant with depth. Using moisture content as the sole predicator of desiccation volume resulted in a low r-squared value (0.22), which indicated that other factors, such as vegetation, field management practices, and biological activity, affected the dynamics of crack formation, evolution and volume.

ISBN: 9781124162041Subjects--Topical Terms:

1017824
Agriculture, Soil Science.

Characterizing flow through the soil matrix and preferential flow pathways (PFPs).
LDR:02696nam 2200325 4500 001 1399690
005 20110926104359.5
008 130515s2010 ||||||||||||||||| ||eng d
020 $a 9781124162041
035 $a (UMI)AAI1479946
035 $a AAI1479946
040 $a UMI $c UMI
100 1 $a Sanders, Emily Christine. $3 1678690
245 1 0 $a Characterizing flow through the soil matrix and preferential flow pathways (PFPs).
300 $a 160 p.
500 $a Source: Masters Abstracts International, Volume: 49-01, page: 0249.
500 $a Adviser: Rabi H. Mohtar.
502 $a Thesis (M.S.)--Purdue University, 2010.
520 $a Using liquid latex as a method to seal preferential flow pathways (PFPs), this study attempted to (1) quantify the contribution of preferential flow to overall flow at various moisture contents, and (2) characterize the effect of preferential flow on soil moisture profiles to 60 cm in depth. Field research was conducted in silty clay loam soil under a no-till corn/soybean rotation field planted to corn. Surface intake rates were measured using a simplified falling head technique under two scenarios: (1) natural soil conditions with unaltered PFPs; and (2) similar soil conditions with latex-sealed PFPs. Further analysis of the latex recovered from the sealed PFPs was conducted in order to differentiate and quantify desiccation crack volumes from biological volumes. Results indicated that the contribution of preferential flow to surface intake rates varied from approximately 34 to 99% depending on the initial moisture content and volume of PFPs present. The moisture profiles in the latex treated frames collected after 1-2 days of water redistribution generally showed uniform increases in water content per 10 cm depth layer in the surface horizon compared to the background moisture profile. Sealing the PFPs with latex simulated Darcian-like flow conditions. Crack volumes decreased with depth while biological volumes remained fairly constant with depth. Using moisture content as the sole predicator of desiccation volume resulted in a low r-squared value (0.22), which indicated that other factors, such as vegetation, field management practices, and biological activity, affected the dynamics of crack formation, evolution and volume.
590 $a School code: 0183.
650 4 $a Agriculture, Soil Science. $3 1017824
650 4 $a Natural Resource Management. $3 676989
650 4 $a Water Resource Management. $3 1669219
690 $a 0481
690 $a 0528
690 $a 0595
710 2 $a Purdue University. $b Agricultural and Biological Engineering. $3 1025335
773 0 $t Masters Abstracts International $g 49-01.
790 1 0 $a Mohtar, Rabi H., $e advisor
790 1 0 $a Kladivko, Eileen J. $e committee member
790 1 0 $a Schulze, Darrell G. $e committee member
790 1 0 $a Abou Najm, Majdi $e committee member
790 $a 0183
791 $a M.S.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1479946