Page 245 - Hydrogeology Principles and Practice

HYDC06 12/5/05 5:34 PM Page 228

BO X
Continued
6.5

Fig. 3 Map showing the location of major
uncontrolled discharges from abandoned
mine workings in the Durham coalfield,
north-east England. After Younger (1995).

Table 1 Hydrochemistry of the Durham coalfield mine drainage discharges at first emergence at the locations shown in Fig. 3.
After Younger (1995).
Hydrochemistry Site and grid reference
Broken Banks Crook Quaking Houses Stoney Heap Tindale Colliery
(NZ 197 295) (NZ 185 356) (NZ 178 509) (NZ 147 515) (Brusselton)
(NZ 197 269)

3 −1
Flow rate (m s ) on 15 Apr. 1994 0.14 0.002 0.007 0.0256 0.01
−1
Calcium (mg L ) 100.7 185 255 83.6 262
−1
Magnesium (mg L ) 61.23 93 103 49.7 107
−1
Sodium (mg L ) 26.9 21.5 463.6 27.9 80
−1
Potassium (mg L ) 10.7 6.8 57.0 6.7 13
−1
Iron (total) (mg L ) 1.8 79.8 18.0 26.3 1.8
−1
Manganese (mg L ) 1.0 6.9 4.8 1.2 1.7
−1
Aluminium (mg L ) 0.26 4.2 12.9 0.16 0.04
−1
Zinc (mg L ) 0.023 0.045 0.040 0.022 0.0184
−1
Copper (mg L ) 0.11 0.23 0.23 0.09 0.01
−1
Alkalinity (mg L as CaCO ) 364.0 0.0 0.0 188 357
3
−1
Sulphate (mg L ) 137.0 810 1358 325 890
−1
Chloride (mg L ) 60 65 1012 102 75
pH 6.5 4.8 4.1 6.3 6.4
Temperature (°C) 10.9 11.8 11.2 10.3 12.0
Eh (mV) 39 264 327 36 −50
−1
Conductivity (mScm ) 1177 1563 3560 1134 2360