radon in groundwater - Mark- och vattenteknik - KTH
radon in groundwater - Mark- och vattenteknik - KTH
radon in groundwater - Mark- och vattenteknik - KTH
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Radon <strong>in</strong> <strong>groundwater</strong> -Influenc<strong>in</strong>g factors and prediction methodology for a Swedish environmentTABLE OF CONTENTSACKNOWLEDGEMENTS.................................................................................................. IIILIST OF PAPERS ................................................................................................................ VIIABSTRACT............................................................................................................................... 1INTRODUCTION .................................................................................................................. 1Hypothesis .............................................................................................................................. 3Objectives ............................................................................................................................... 3BACKGROUND....................................................................................................................... 3Pr<strong>in</strong>cipal Component Analysis (PCA)...................................................................................... 4Risk Variable Methodology...................................................................................................... 4Visual Data M<strong>in</strong><strong>in</strong>g.................................................................................................................. 5DESCRIPTION OF STUDY AREA ...................................................................................... 6DATA AND METHODS......................................................................................................... 6Data used ................................................................................................................................7Methods .................................................................................................................................. 7RESULTS AND DISCUSSIONS.......................................................................................... 11Visual data m<strong>in</strong><strong>in</strong>g ................................................................................................................. 11Statistical analyses of data - Interpretations............................................................................ 13Radon prediction us<strong>in</strong>g Risk Variable Modell<strong>in</strong>g.................................................................... 15A prediction map <strong>in</strong> GIS ....................................................................................................... 15Detailed study on Ljusterö..................................................................................................... 18CONCLUSIONS .................................................................................................................... 19FUTURE WORK.................................................................................................................... 19REFERENCES ...................................................................................................................... 20v