Table 2.

Hydraulic conductivities from pumped impeller flow logging, other wells

Well nameUK grid referenceGround surface elevation (mASL)Top of aquifer (mASL)T (m2 day−1)Layer thickness (m)Layer K (m day−1)Lower 95% confidence limit on KUpper 95% confidence limit on K
Confined aquifer
BenningholmeTA1233892.5−16.43208.138*
350.250.230.25
130
CarnabyTA15164815−9.41302.819*
680.840.830.85
0.2960870
2.60
HempholmeTA0954951.6−13.39013.92.5*
1.0554763
5.30
Thornholme MoorTA11760611−813014.87.4*
6.23.32.83.3
6.00
Unconfined aquifer
North End StreamTA0225841812†10706.3143*
8.0272527
2.50
  • Logging conducted in September 2006 and May 2007, except Carnaby, which was logged in December 1996, data provided by D. Buckley of the British Geological Survey.

  • * Upper layer value corrected for presence of well casing as explained in the text; no confidence interval given.

  • Water table elevation within Chalk on 11 May 2007; varies between 4.5 and 13 mASL.