Table 3 Parameter estimates from BDB-1 borehole pulse withdrawal tests and constant rate (CR) withdrawal tests (K [m s−1]: hydraulic conductivity; Ss [m−1]: specific storage; n: flow dimension; ts [cm]: skin thickness)
Test | Interval | Ts [cm] | K [m s−1] | Ss [m−1] | n | |||||
|---|---|---|---|---|---|---|---|---|---|---|
Formation | Skin | Formation | Skin | |||||||
Range | Best fit | Best fit | Range | Best fit | Best fit | Range | Best fit | |||
Pulse | ||||||||||
C1–1 | I1 | – | 1 × 10−10–3.5 × 10−10 | 2.1 × 10−10 | – | 6 × 10−9–6.3 × 10−8 | 1.4 × 10−8 | – | 1.9–2.7 | 2.2 |
C1–2 | I1 | – | 1 × 10−11–1 × 10−7 | 4.2 × 10−10 | – | 1.4 × 10−6 | – | 2.0 | ||
C1–3 | I1 | – | 1 × 10−11–1 × 10−7 | 5.6 × 10−10 | – | 6.3 × 10−8 | – | 2.4 | ||
C1–6 | I1 | – | 3 × 10−11–1 × 10−8 | 5.9 × 10−9 | – | 8.3 × 10−7 | – | 2.0 | ||
C2–1 | I2 | 0.5 | 2 × 10−12–3 × 10−11 | 3.1 × 10−12 | 7.8 × 10−12 | 1 × 10−7–3 × 10−5 | 5.2 × 10−6 | 4.3 × 10−5 | 1.8–3.0 | 2.8 |
C2–2 | I2 | 0.5 | 2 × 10−12–1 × 10−10 | 7.3 × 10−12 | 1.0 × 10−11 | 1 × 10−7–2 × 10−5 | 3.0 × 10−6 | 4.7 × 10−5 | 1.4–2.9 | 2.0 |
C3–1 | I3 | 0.5 | 1 × 10−13–3 × 10−12 | 5.1 × 10−13 | 1.6 × 10−12 | 5 × 10−7–3 × 10−5 | 3.7 × 10−6 | 1.2 × 10−5 | 1.4–3.1 | 2.1 |
C3–2 | I3 | 0.5 | 2 × 10−13–2 × 10−12 | 4.9 × 10−13 | 1.6 × 10−12 | 2 × 10−6–3 × 10−5 | 1.1 × 10−5 | 1.5 × 10−5 | 1.4–3.4 | 2.5 |
C4–1 | I4 | 0.5 | 1 × 10−12–9 × 10−12 | 2.3 × 10−12 | 5.7 × 10−12 | 2 × 10−6–1 × 10−5 | 6.4 × 10−6 | 5.5 × 10−5 | 1.7–3 | 2.3 |
C4–2 | I4 | 2.0 | 7 × 10−13–1 × 10−11 | 4.2 × 10−12 | 2.7 × 10−11 | 1 × 10−6–2 × 10−5 | 2.2 × 10−6 | 9.7 × 10−6 | 1.5–3 | 2.0 |
C5–1 | I5 | 0.5 | 4 × 10−13–4 × 10−12 | 1.6 × 10−12 | 1.4 × 10−12 | 3 × 10−7–8 × 10−6 | 1.0 × 10−6 | 2.6 × 10−5 | 1.8–2.9 | 1.9 |
C5–2 | I5 | 0.5 | 4 × 10−13–3 × 10−12 | 1.0 × 10−12 | 2.7 × 10−12 | 1 × 10−6–3 × 10−5 | 8.5 × 10−6 | 4.7 × 10−5 | 1–3 | 2.5 |
C6–1 | I6 | 1.5 | 8 × 10−14–8 × 10−13 | 1.9 × 10−13 | 1.4 × 10−11 | 8 × 10−7–1 × 10−5 | 6.6 × 10−6 | 6.6 × 10−6 | 1.7–3 | 2.6 |
C6–2 | I6 | 0.5 | 2 × 10−13–6 × 10−13 | 2.7 × 10−13 | 5.4 × 10−12 | 1 × 10−6–2 × 10−5 | 1.7 × 10−5 | 2.9 × 10−5 | 1.7–3 | 2.8 |
C7–1 | I7 | 0.5 | 3 × 10−13–4.5 × 10−12 | 5.8 × 10−13 | 3.7 × 10−13 | 4 × 10−7–2 × 10−5 | 3.7 × 10−6 | 1.9 × 10−6 | 1.9–3.5 | 3.0 |
C7–2 | I7 | 0.5 | 4 × 10−13–2 × 10−12 | 1.4 × 10−12 | 8.6 × 10−12 | 10−9–2 × 10−5 | 1.2 × 10−6 | 9.4 × 10−7 | 2.1–2.6 | 2.3 |
CR | ||||||||||
C1–7 | I1 | 4.3 | 1 × 10−10–1 × 10−9 | 5.0 × 10−10 | 5.7 × 10−9 | 1 × 10−8–1 × 10−4 | 8.2 × 10−6 | 6.2 × 10−5 | 2.0–3.0 | 2.1 |
C2–2 | I2 | 14.2 | 4 × 10−13–8 × 10−11 | 3.9 × 10−12 | 3.5 × 10−11 | 1.2 × 10−6 | 9.0 × 10−5 | 1.4–2.7 | 1.95 | |
C3–3 | I3 | 0.7 | 1 × 10−13–2 × 10−12 | 9.9 × 10−13 | 1.6 × 10−12 | 3 × 10−8–6 × 10−5 | 1.5 × 10−5 | 4.9 × 10−5 | 1.5–3.0 | 1.9 |
C4–3 | I4 | 1.4 | 4 × 10−14–5 × 10−12 | 2.4 × 10−12 | 3.0 × 10−12 | 4 × 10−8–3 × 10−4 | 1.2 × 10−5 | 4.0 × 10−5 | 1.9–3.0 | 2.1 |
C5–3 | I5 | 1.8 | 7 × 10−14–9 × 10−12 | 8.1 × 10−13 | 1.5 × 10−11 | 1 × 10−7–3 × 10−5 | 8.9 × 10−5 | 2.4 × 10−5 | 1.9–3.0 | 2.3 |
C6–3 | I6 | 0.5 | 1 × 10−14–4 × 10−12 | 2.2 × 10−13 | 1.1 × 10−12 | 1 × 10−7–2 × 10−5 | 7.7 × 10−6 | 9.9 × 10−5 | 1.5–2.9 | 2.5 |
C7–3 | I7 | 0.6 | 1 × 10−13–1 × 10−12 | 4.4 × 10−13 | 8.2 × 10−13 | 3 × 10−8–4 × 10−6 | 8.5 × 10−6 | 2.3 × 10−5 | 2.1–3.0 | 2.7 |