reducing infiltration with PAM or PVA

[Luis Samoilov]

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Luis Samoilov writes:

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From my experience (M.A. thesis using PAM polymer to reduce stress effect in
artificial soil-Tuff-Gravel)with polyacrilamid Pam (K basis), highly salty
water will reduce the swelling effect of the polymers to almost 0

Luis Samoiloff

Luis2000@Hatzerim.org.il
Luis@netafim.com

-----Original Message-----
From: owner-sowacs@aqua.ccwr.ac.za [mailto:owner-sowacs@aqua.ccwr.ac.za]
Sent: Monday, September 09, 2002 10:02 PM
Subject: reducing infiltration with PAM or PVA

Dan Burgard writes:

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To Ian Hollingsworth-

In my experience both professionally and through research, polymers have
been used to improve or maintain infiltration.  Our company has tried
successfully tried the use of PAM to maintain infilatration with highly
sodic irrigation water.  Long term it was not viable because of the sodic
chemistry of the soil was not desireable but the PAM helped maintain
infiltration rates.  I have not heard of anyone using polymers to reduce
infiltration.  Seems to me you should need a dispersant to reduce
infiltration such as a sodium compound not a polymer which will encourage
flocculation and maintain soil structure.

Daniel J. Burgard, CPSSc
Cascade Earth Sciences
DanB@cascade-earth.com
(509) 921-0290  voice
(509) 921-1788  fax
(509) 981-9241  cell
Visit our web site at WWW.cascade-earth.com

-----Original Message-----
From: owner-sowacs@aqua.ccwr.ac.za [mailto:owner-sowacs@aqua.ccwr.ac.za]
Sent: Monday, September 09, 2002 2:16 AM
Subject: reducing infiltration with PAM or PVA

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Hello,
              We are investigating the use of polymers to reduce
infiltration
into mineralised waste rock at a mine site. The rocks   are  chloritic
schists
which weather rapidly. The surface is compacted with an impact roller and
the
surface texture is a sandy loam with about 50 % rock fragments. I am
interested
in any experience people have using PAM, PVA or other products to reduce
infiltration.

Thankyou
Ian Hollingsworth
Soil Scientist, EWL Sciences
ph: 08 89225 221,
 fax: 08 89225 260,
email: Ian.Hollingsworth@ewlsciences.com.au

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