Table 2.

Summary of hydraulic conductivity measurements for BIONICS embankment and Newbury, Loughbrickland and Craigmore cuttings

SiteNo. of testsMean (m s−1)Maximum (m s−1)Minimum (m s−1)SDCoV
BIONICS (all)853.3 × 10−69.6 × 10−53.6 × 10−101.2 × 10−53.69
Well-compacted*343.6 × 10−64.5 × 10−51.1 × 10−91.1 × 10−52.92
Poorly compacted*513.1 × 10−69.6 × 10−53.6 × 10−101.3 × 10−54.28
North-facing*494.7 × 10−69.6 × 10−53.6 × 10−101.6 × 10−53.36
South-facing*361.4 × 10−61.3 × 10−58.1 × 10−103.1 × 10−62.20
Loughbrickland121.0 × 10−58.6 × 10−52.4 × 10−92.4 × 10−52.35
Craigmore111.0 × 10−69.4 × 10−63.8 × 10−92.7 × 10−62.57
Newbury181.1 × 10−67.3 × 10−61.0 × 10−112.1 × 10−61.93
  • SD, standard deviation; CoV, coefficient of variation (standard deviation/mean).

  • *It should be noted that the entire BIONICS dataset is reported in the ‘compaction’ and ‘slope orientation’ statistics, hence the repetition of maximum and minimum values.

  • Newbury dataset includes only measurements shallower than 1.0 m below ground level.