Frequency of Mine Dust Episodes and the Influence of Meteorological Parameters on the Witwatersrand Area, South Africa
Table 1
Correlation between dust levels at selected sites and meteorological parameters.
Sample site
Mean rain
Max rain
Min temp
Mean speed
Max speed
Mean direc
Mean hum
Min press
Residential location
4EDRF
−0.27**
−0.30**
−0.24*
0.31**
0.31**
0.23*
−0.44**
−0.21*
8JCCH
−0.17
−0.15
−0.13
0.06
0.16
0.11
−0.09
−0.18
61SKL
−0.27**
−0.25**
−0.20*
0.38**
0.28**
0.25**
−0.51**
−0.11
34NENT
−0.20*
−0.17
−0.16
0.41**
0.37**
0.19*
−0.38**
−0.21*
40HOSTEL
−0.02
−0.05
−0.02
0.58**
0.37**
0.23*
−0.28**
−0.22*
43MLTB
−0.18
−0.21*
−0.08
0.31**
0.32**
0.09
−0.39**
0.17
47CHIA
−0.35**
−0.35**
−0.28**
0.47**
0.43**
0.32**
−0.59**
−0.23*
50MOLLO
−0.22*
−0.23*
−0.15
0.52**
0.40**
0.17
−0.40**
−0.19*
53-1121
−0.12
−0.07
−0.21*
0.27**
0.31**
0.15
−0.33**
−0.14
57JCELC
−0.13
−0.14
−0.13
0.39**
0.29**
0.25**
−0.36**
−0.08
59JCDOG
−0.23*
−0.26**
−0.16
0.35**
0.24**
0.26**
−0.44**
−0.13
70CTC
−0.17
−0.17
−0.12
0.28**
0.27**
0.15
−0.42**
−0.12
Nonresidential locations
13ILLA
0.04
0.04
0.11
0.17
0.01
−0.04
0.14
−0.12
15ILLG
−0.18
−0.23*
−0.02
0.47**
0.40**
0.10
−0.39**
−0.22*
18BTH
−0.28**
−0.28**
−0.19*
0.43**
0.33**
0.18
−0.46**
−0.23*
21HR
−0.16
−0.10
−0.05
0.47**
0.33**
0.30**
−0.38**
−0.17
23IMP
−0.15
−0.13
−0.06
0.47**
0.29**
0.29**
−0.37**
−0.10
27PP
−0.18
−0.16
−0.18
0.30**
0.30**
0.29**
−0.34**
−0.11
32KLL
−0.32**
−0.29**
−0.31**
0.41**
0.40**
0.29**
−0.52**
−0.17
45WAYN
−0.23*
−0.23*
−0.12
0.47**
0.38**
0.06
−0.46**
−0.23*
65KG MINING
−0.13
−0.13
−0.07
0.40**
0.25**
0.18
−0.29**
−0.10
66WDSS
−0.19
−0.17
−0.17
0.34**
0.27**
0.08
−0.32**
−0.14
95% confidence level. Mean rain: mean rainfall. Min temp: minimum temperature. Max speed: maximum wind speed. Mean hum: mean air humidity.
**99% confidence level. Max rain: maximum rainfall. Mean speed: mean wind speed. Mean direc: mean wind direction. Min press: minimum air pressure.
