Ground Water Assessment

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Ground Water Assessment

• Drought Management Advisory
• Council Meeting
• August 14, 2008
• Jeff Lautier (919-715-5395 or jeff.lautier_at_ncmail.
  net)
• Ground Water Management Section

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Drought Indicator Wells

• 46 wells with a 29 year average record, records
  range from 6 to 60 years long
• 22 wells monitored by USGS
• Automatic recorders, hourly data, real-time
  access
• 24 wells monitored by DWR
• Automatic recorders, hourly data, downloaded
  quarterly
• Range in depth from 11 to 555 feet
• All respond to rainfall within hours of event

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Drought Indicator Wells Current conditions tab on
www.ncdrought.org
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14 below minimum Red 14 below 10th percentile
Clear 13 below 25th percentile Gold 4 below 50th
percentile Brown Remaider above 50th percentile
January 2008
Color codes tell how monthly water levels in
46 well network compare to historical levels from
same month
August 2008
1 below minimum Red 11 below 10th percentile
Clear 11 below 25th percentile Gold 12 below
50th percentile Brown Remaider above 50th
percentile
Overall we have seen an improvement in water
levels between January and August, 2008 as shown
by maps from each month. The color codes tell us
how the monthly water level compares as a
percentile with previous water levels in years
before in the same month.
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More wells reached their minimum of record in
2007 than in any other year even 2002.
Fourteen wells have reached their minimum of
record so far in 2008.
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Base flow
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Surface Water Flows Ground Water Levels
Near Mocksville, Yadkin Co.
Lowering wls/higher et
Upward wls/lower et
Blue line South Yadkin River flow in cu.
ft./second Pink line Ground water
levels/surficial aquifer/well NC-221 At Mocksville
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Surface Water Flows Ground Water Levels
Blue line Potecasi Creek, Hertford County, flow
in cu. ft./second Pink line Ground water
levels/surficial aquifer/well Como Station
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