Ground radon spatio-temporal variability evaluation

1
Ground radon spatio-temporal variability
evaluation

• Tomáš Hlásny, Martin Polka, František Durec,
  Elena Krátka
•  

2
Purpose

• To analyse ground radon short and middle term
  temporal variability on the bases of long-term
  monitoring

3
Radon An overview

• General characteristics
• Sources
• Impact on human health

4
The methods

• Field data gathering
• Sampling design
• Data gathering and processing
• Analyses
• Standard time series analyses descriptive
  characteristics
• Trend surface analyses
• Geostatistical analyses

5
Case study

• Research area

6
Case study

• Sampling design

7
Case study - source data desription

• 1841 measurement arranged in 49 time series

8
Case study derived characteristics
TS
1stdiff
2nd diff
15 14 1 16 -2 3 17
-1 -1 19 -2 1
0.17avg 2nd diff acc. index 15 4
-6 18 -3 7 18 0
-3
9
Case study derived characteristics
10
Case study Trend surface analysis
11
Case study Geostatistical analysis
12
Case study Model classification
13
Conclusion

• Analytically proved and quantified ground radon
  short\middle term temporal variability
• No significant trend in acceleration index
  spatial distribution
• Data positively autocorrelated up to 300 meters
• Appropriate measures for practice were derived