Table 3.

Hydraulic transport properties of granites

Depth (MD)Depth (TVD)
z1 (m)z2 (m)z1 (m)z2 (m)Δz (m)T (°C)η (mPa s)%Tκ%TKTκ (D m)TK (m2 s−1)κP (m2)K (m s−1)
Rosemanowes RH-15
2130237420542273219550.5071216.200.1132.18 × 10−65.16 × 10−169.99 × 10−9
237423952273229219650.4365968.480.4771.07 × 10−52.51 × 10−145.65 × 10−7
239524152292231018680.4171211.760.0932.18 × 10−65.16 × 10−151.21 × 10−7
241524662310235646780.36500.00----
246624902356237620800.3551211.340.0792.18 × 10−63.95 × 10−151.09 × 10−7
2490270023762565189950.29953.980.0289.10 × 10−71.47 × 10−164.81 × 10−9
5111001000.7901.82 × 10−5
Eastgate-1
41043241043222260.8809999.3439204.37 × 10−21.78 × 10−101.99 × 10−3
432995432995563270.85910.6625.62.92 × 10−44.55 × 10−145.19 × 10−7
58510010039254.40 × 10−2

Here, z1 and z2 denote the depth limits above and below each interval of each borehole, in terms of both Measured Depth (MD) and True Vertical Depth (TVD). The Eastgate-1 borehole is vertical so these measures of depth are equivalent. Δz is the difference between z2 and z1 measured as TVD. T is a representative temperature of the water in each interval. η is the viscosity of water at temperature T. Tκ and %Tκ are the transmissivity of each interval and its percentage of the total transmissivity, expressed as κP × Δz, where κP is the permeability of the interval. TK and %TK are the transmissivity of each interval and its percentage of the total transmissivity, expressed as K × Δz, where K is the hydraulic conductivity of the interval. Data (i.e. the stated values for z1, z2, T, %Tκ, and Tκ) are from Richards et al. (1994) for the Carnmenellis Granite (in the Rosemanowes RH-15 borehole, Cornwall), and from Manning et al. (2007) and Younger & Manning (2010) for the Weardale Granite (in the Eastgate-1 borehole, County Durham). The other parameters are calculated as part of the present study, using standard formulae for the interrelationships between the quantities listed. See text for discussion.