The Rural Voice, 2005-02, Page 21abandoned. "He needed ground rules
and no one would give them,"
Simpson remembers.
Planning for this kind of
protection requires knowledge of
where water comes from that goes
into a well or other source for a
municipality's water system. It's not
as easy as some might think.
Dr. David Bisenthal last year
recalled that in the days immediately
after the Walkerton tragedy, some
officials tried to suggest the E. coli -
infected water that entered the
Walkerton water system had come
overland from his barnyard, but it
was later proven that water from his
barnyard would have had to flow
uphill to take an overland route to the
well. He quoted Dr. Michael Gross of
the University of Guelph, who told
him there was no way the water
could have come from his farm
overland. It was more likely that
wherever the water came from that
polluted Walkerton, it likely came
underground.
Underground water movement is a
real mystery. In an effort to map
groundwater aquifers, the Upper
Thames River Conservation
Authority recently purchased gamma
ray logging equipment from a
company based in the United
Kingdom. This equipment was
originally used by the petroleum
industry to locate oil beds.
The equipment measures gamma
radiation produced by the decay of
radioac'tive elements in the earth.
Porous materials such as sand and
gravel emit less gamma radiation
than non -porous materials like clay
or shale. Reading the emissions
allows a hydrologist to determine the
type of material found at each depth.
This information, combined with
other geotechnical resources, allows
creation of a subsurface map of the
aquifers, the water found in sand and
gravel deposits.
The Upper Thames authority is
working with the Ausable Bayfield,
Essex Region, Lower Thames
Valley, Maitland Valley and St. Clair
Region conservation authorities
because earlier groundwater studies
had found some aquifers extend
beyond the boundaries of individual
watersheds.
This problem was pointed out by
the Maitland Watershed Partnership's
Make a Choice ...
... Make a Difference!
-- Choose the CFFO in 2005 -
Christian Farmers Federation of Ontario
5653 Hwy 6 North, RR 5, Guelph, ON N1H 6J2
Voice: 519-837-1620 Fax: 519-824-1835
email: cffomail@christianfarmers.org website: www.christianfarmers.org
TOP DRY
HOW DOES THE
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1) Grain is loaded into the upper chamber
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lower part of the bin for cooling/storage
4) The dump chutes are cranked closed
and another batch is loading into the
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131 Thames Rd. W.
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Exeter, Ontario NOM 1 S3 Visit our website: www.almar.on.ca
FEBRUARY 2005 17