500 presentation 090820-v3...p1 53 hr aquifer test – church well. static water level – sea farm...
TRANSCRIPT
St. Alban’s
August 2009
St. Alban’s
Static Water Level – Church Well
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Time Since Pump Started (min)
Dra
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ow
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m)
Levelogger Date
Date: July 10-12, 2009
Q = 332 L/min
CW
P2
P3
P1
53 hr Aquifer Test – Church Well
Static Water Level – Sea Farm Well
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Levelogger DateDate: July 15-18, 2009 Q = 232 L/min
SFW
DFA
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72 hr Aquifer Test – Sea Farm Well
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Time Since Pump Started (minutes)
Dra
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Date: July 22-24, 2009 Levelogger Date
Recirculating
Condition (?)
48 hr Aquifer Test – Town Well #8
Interference Test
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Levelogger Date Test: Interference test Site: St. Alban's Date: July 15-25, 2009 Pump Start on July 15, 16:22
Pump Starts
in SFWPump Starts
in CW
Pump Starts
in Town Well
SFW
SFW-P2
SFW-DFA
SFW-P1
SFW
SFW-P2
SFW-DFA
SFW-P1
CW
CW-P2
CW-P1
CW
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CW-P1
Town Well
Proposed Water Usage New Facility St Albans
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Make u
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JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Month
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20-Aug 30-Aug 9-Sep 19-Sep 29-Sep 9-Oct 19-Oct 29-Oct 8-Nov 18-Nov 28-Nov
Date (2008)
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sag
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m3/d
ay)
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20-Aug 30-Aug 9-Sep 19-Sep 29-Sep 9-Oct 19-Oct 29-Oct 8-Nov 18-Nov 28-Nov
Date (2008)
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O. B. Yield
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20-Aug 30-Aug 9-Sep 19-Sep 29-Sep 9-Oct 19-Oct 29-Oct 8-Nov 18-Nov 28-Nov
Date (2008)
Avera
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ay)
Based 400 L per day per person
O. B. Yield
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20-Aug 30-Aug 9-Sep 19-Sep 29-Sep 9-Oct 19-Oct 29-Oct 8-Nov 18-Nov 28-Nov
Date (2008)
Avera
ge U
sag
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m3/d
ay)
Based on 400 L per person per day
Make up (Daily in m3/day)
AugustSeptember
OctoberNovember
O. B. Yield
Average Town Daily Water Usage
O. B. Yield
• M B & A Ltd Report – Total Yield of Overburden Aquifer – 2,160 m3/day.
• Town Usage – 550 to 2,020 m3/day.
• Town needs – 1,250 people at 400 litres per person per day – 500 m3/day.
• Fish Plant – estimated at 300 to 600 m3/day .
• Total Town needs – app. 1,100 m3/day.
• Fire flows from storage and well capacity
Assessment and Background
• (2,160 – 1,100 m3/day) = 1,060 m3/day.
• Bedrock aquifer not included in MB&A Ltd
report.
• Bedrock wells can produce in excess of 600
litres/minute in the short term.
• Bedrock aquifer is a leaky confined aquifer.
• Possible long term yield from bedrock wells
ranging from 100 to 600 m3/day.
• Swanger Cove estimated to yield about 15 to
50 m3/day of fresh to brackish water.
• Fish Hatchery Demand peaks in April
Conclusions – Water Availability
• Stakeholders
Town, including the Fish Plant
DFA – research/service site
DMA and DOEC – Water Supply
Fish Hatchery
DFO – Swanger Cove River low flow
Future Industrial Developments
• Water needs are much less than water usage due to leaks in Town’s pipelines
• Fix the leaks – free up over 1,000 m3/day
Points for Discussion
• COS collected data on the bedrock aquifer that is needed to calibrate a future 3D flow model.
• Consider fixing major leaks in the Town’s water distribution network.
• Leak fix will free up water for future Town and Industry growth.
• Town wells need to be rehabilitated and specific capacity restored.
Points for Discussion
• Water needed for the fish hatchery exists in the overburden aquifer through bedrock wells.
• Additional water is available from the bedrock aquifer and Swanger Cove area.
• Consider fixing the major leaks in the Town’s water distribution network.
Conclusion