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Hello Folks.. this research is important for any leaching into
groundwater.. the lecture details below could be helpful in
opposing the 'new' use of pits and quarries as landfill
depositories. . Eg the <a class="moz-txt-link-abbreviated" href="http://www.opalalliance.ca">www.opalalliance.ca</a><br>
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This presentation was by David Rudolph, Ph.D,, PE from U of
Waterloo in Guelph this week... it was most interesting. <br>
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His research covers groundwater contamination from a 300 plus
acres in Oxford Cty.. and is pertinent to our concerns re
quarries being re-purposed for landfill sites. He has written
a report and his research covers 10 years of nitrate
infiltration of the soil.. noting the time it took and the
area of influence through the various layers, etc. It was
extensive.. they placed and took readings from over 100 wells
over the years in the area.. wells to take data from... great
research. <br>
This is the only kind in the world that has done this so is
highly significant globally. <br>
<br>
He stated that 40% of the earth's surface is used for
agriculture and by 2050 food demand will increase by 70% and
agricultural water by 50%. Agriculture is the largest source
of water pollution except for china where industrial pollution
is the worst. <br>
Reactive nitrogen is the greatest single experiment in global
geo-engineering. You can download the European Nitrogen
Assessment from the internet.. A Global Grand Challenge.<br>
So this research started with the farmers using 100 lbs/acre
of nitrate and they found they could use 50 lb/acre to get the
same yield if they used rotation of crops. And the
infiltration in the groundwater was significantly reduced.
The Global Nature Fund now lists Lake Winnipeg as the most
threatened lake in the world!<br>
65% of Southwestern Ontario is agricultural. Woodstock
Thornton Field had 5 water production wells in sand and gravel
aquifers averaging 100 ft deep and there was chronic increased
nitrate in the groundwater. They made various adjustments...
and all became an example of BMP ( best management practices).
<br>
<br>
I talked with him after the lecture and he agreed that
filling in quarries and pits like the one near Ingersoll must
not happen and the contamination risks to soil and water would
be significant. His research conclusions although related to
chemical nitrate use and how it contaminates groundwater would
be helpful to use in fighting the landfill in quarries. Emil
Frind , a long time prof at U of Waterloo was on the credits
at the end of his power point and Gary Parker at U of Guelph
also. <br>
<br>
He pointed to <br>
The Council of Canadian Academies ( <a
moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.scienceadvice.ca/en.aspx">http://www.scienceadvice.ca/en.aspx</a>
) that has just this week released a report on agriculture
and water protection. It is at this link. There will be info
in some of the chapters that can be used for protecting pits
and quarries from landfill. <br>
<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.scienceadvice.ca/uploads/eng/assessments%20and%20publications%20and%20news%20releases/Water_Agri/WAG_fullreportEN.pdf">http://www.scienceadvice.ca/uploads/eng/assessments%20and%20publications%20and%20news%20releases/Water_Agri/WAG_fullreportEN.pdf</a><br>
<br>
Also, Dr Rudolph is giving the lecture again in Waterloo soon.
It would be worth it to attend when he presents again in
Waterloo. <br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://uwaterloo.ca/earth-environmental-sciences/people-profiles/david-l-rudolph">http://uwaterloo.ca/earth-environmental-sciences/people-profiles/david-l-rudolph</a><br>
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He is a valuable contact for OPAL and Gravel Watch Ontario
as well as general groundwater contamination from
agriculture.... . <br>
<br>
Norah Chaloner <br>
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<br>
<h1>David L. Rudolph</h1>
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field-type-text field-label-hidden">
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<div class="field-item even" property="schema:title">Groundwater
(Hydrology)</div>
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<p><img alt="David Rudolph" class="image-right"
src="cid:part4.01020709.04000606@hotmail.com" width="200"
height="280"></p>
<p><strong>Office:</strong> Physics (PHY) 229B<br>
<strong>Phone:</strong> (519) 888-4567 ext. 36778<br>
<strong>Email:</strong> <a moz-do-not-send="true"
href="mailto:drudolph@sciborg.uwaterloo.ca">drudolph@uwaterloo.ca</a></p>
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