... have a look at the document at:
eap.mcgill.ca/wetland1.html
Maybe it will be of some help... regards ..john
John Henning
Assoc. Prof., Dept. of Agricultural Economics
Director, Ecological Agriculture Projects
Academic Advisor, Programs in Ecological Agriculture
Faculty of Agricultural and Environmental Sciences
McGill University, Macdonald Campus
Ste Anne de Bellevue, QC, H9X 3V9
CANADA
VOX: 1-514-398-7826
FAX: 8130
NET: INF3@MUSICB.MCGILL.CA
WEB: www.eap.mcgill.ca
>Folks: One of my research areas is livestock:watercourse
>interactions, and one of the issues that I cannot seem to come to
>terms with is how much of an improvement is actually achieved by
>various improvement/intervention schemes for improving
>downstream water quality. I'm specifically interested in non point
>source types of contamination - not industrial effluent or sewage
>treatment plants, but diffuse sources, like uncontrolled cattle
>access, tile drainage, and septic systems.
>
>Let me further restrict the focus to downstream water quality only -
>I'm not looking for information on habitat, biodiversity, streambank
>stability, or any of the other things that can be influenced by
>livestock. Just water quality, using any one of a number of
>parameters such as coliforms, cryptosporidia, P, sediment, or any
>other type of contaminant that will have to be dealt with (at a cost)
>by downstream water treatment facilities before humans can drink the
>water.
>
>Can anyone can direct me to a source of credible information on
>monitoring watershed-scale improvements in water quality in response
>to specific managerial interventions, as exclusionary fencing,
>reinforced crossings, manure management practices (incl. containment
>and/or timing of application), or correction of malfunctioning septic
>systems. Many practices are recommended - or required - of
>producers, but I haven't been able to identify much in the way of
>information showing that once the recommended practices are followed,
>it actually makes a big enough impact to show up in downstream water
>quality.
>
>Can someone help me out with this? thanks in advance - Ann
>
>ACLARK@plant.uoguelph.ca
>Dr. E. Ann Clark
>Associate Professor
>Crop Science
>University of Guelph
>Guelph, ON N1G 2W1
>Phone: 519-824-4120 Ext. 2508
>FAX: 519 763-8933
>http://www.oac.uoguelph.ca/www/CRSC/faculty/eac.htm
>
>To Unsubscribe: Email majordomo@ces.ncsu.edu with "unsubscribe sanet-mg".
>To Subscribe to Digest: Email majordomo@ces.ncsu.edu with the command
>"subscribe sanet-mg-digest".
To Unsubscribe: Email majordomo@ces.ncsu.edu with "unsubscribe sanet-mg".
To Subscribe to Digest: Email majordomo@ces.ncsu.edu with the command
"subscribe sanet-mg-digest".