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CONSTANT HEAD TEST
Talsma Hallam Method AS/NZ 1547:2000 Appendix 4.1F
Client URBN Town Planning Hole No TP5
Project ECOCABINS Test Date 29/07/2025
Location 224 Moran Group Rd, Kin Kin Project No. J002915
dh
Tested by TS Checked
Co-ordinates 488024 / 7100831
Depth of Hole (Lh) 33.00 cm Vegetation
Tube below Surface (Lt) 15.00 cm Rootlets to 0.2m
Length to Air Inlet (Ls) 10.0 cm Mature trees adjacent ~6m
Test Section (H) 18 cm Soil moisture prior to test Lt
Diameter of test section (Dh) 6.00 cm W=PL / Moist Dt
Ls Lh
Diameter of tube (Dt) 4.330 cm
Static depth to gw (hs) 1000.00 cm General comments (soil structure, H
Dh
Depth Impermeable Layer (S) 150.00 cm macro pores, water logging etc)
Radius of Tube (R) 2.17 cm Topsoil / Resdiual soil
Radius of Test Section (r) 3.00 cm S
Impermeable Layer
i = 1, 2, 3, ....n
100 Level in Difference
i Time Tube in level
90 t h dh K
(min) (cm) (cm) (m/s)
80
1 0.00 87.500 0.000 #DIV/0!
70 2 0.50 86.000 -1.500 #DIV/0!
3 0.80 85.000 -2.500 #DIV/0!
60
4 0.95 84.000 -3.500 #DIV/0!
50 h 5 1.10 83.000 -4.500 #DIV/0!
6 1.25 82.000 -5.500 #DIV/0!
40 7 1.4 81.0 -6.500 #DIV/0!
8 1.6 80.0 -7.500 #DIV/0!
30
9 1.8 79.0 -8.500 #DIV/0!
20 10 1.9 78.0 -9.500 #DIV/0!
11 2.0 77.0 -10.500 #DIV/0!
10 12 2.3 76.0 -11.500 #DIV/0!
0 13 2.5 75.0 -12.500 #DIV/0!
0.00 5.00 10.00 15.00 14 2.6 74.0 -13.500 #DIV/0!
15 2.8 73.0 -14.500 #DIV/0!
Time t (min) y = -4.4682x + 86.409
16 3.0 72.0 -15.500 #DIV/0!
R² = 0.9952
17 3.3 71.0 -16.500 #DIV/0!
18 3.5 70.0 -17.500 #DIV/0!
19 3.6 69.0 -18.500 #DIV/0!
Calculation of Hydraulic Conductivity, K : 20 3.8 68.0 -19.500 #DIV/0!
21 4.0 67.0 -20.500 #DIV/0!
π R 2 ∆h 22 4.3 66.0 -21.500 #DIV/0!
0.5sinh-1 H − r r
4.4 2 + 0.25 + 23 4.5 65.0 -22.500 #DIV/0!
∆t 2r H H
24 4.8 64.0 -23.500 #DIV/0!
K =
2πH 2 25 5.8 60.0 -27.500 #DIV/0!
26 7.0 54.0 -33.500 #DIV/0!
27 8.0 50.0 -37.500 #DIV/0!
28 9.3 45.0 -42.500 #DIV/0!
29 10.4 40.0 -47.500 #DIV/0!
30 11.7 35.0 -52.500 #DIV/0!
Equilibrium Hydraulic Conductivity : 31 13.0 30.0 -57.500 #DIV/0!
32 14.2 25.0 -62.500 #DIV/0!
Time Height 33
Start from 1 0.0 87.5 34
End at 32 14.2 25.0 35
K = -1.3E-05 m/sec 36
FILE LOCATION: https://coreconsultants-my.sharepoint.com/personal/tsutton_coreconsultants_com_au/Documents/Desktop/[J2915_Talsma hallam (Constant Head)_TP5.xls]Input
Golder Associates Forms/Hydro/H001/Feb04/JJV
Document Set ID: 24031832
Version: 1, Version Date: 14/08/2025
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