radon in groundwater - Mark- och vattenteknik - KTH

Radon in groundwater -Influencing factors and prediction methodology for a Swedish environmentTABLE OF CONTENTSACKNOWLEDGEMENTS.................................................................................................. IIILIST OF PAPERS ................................................................................................................ VIIABSTRACT............................................................................................................................... 1INTRODUCTION .................................................................................................................. 1Hypothesis .............................................................................................................................. 3Objectives ............................................................................................................................... 3BACKGROUND....................................................................................................................... 3Principal Component Analysis (PCA)...................................................................................... 4Risk Variable Methodology...................................................................................................... 4Visual Data Mining.................................................................................................................. 5DESCRIPTION OF STUDY AREA ...................................................................................... 6DATA AND METHODS......................................................................................................... 6Data used ................................................................................................................................7Methods .................................................................................................................................. 7RESULTS AND DISCUSSIONS.......................................................................................... 11Visual data mining ................................................................................................................. 11Statistical analyses of data - Interpretations............................................................................ 13Radon prediction using Risk Variable Modelling.................................................................... 15A prediction map in GIS ....................................................................................................... 15Detailed study on Ljusterö..................................................................................................... 18CONCLUSIONS .................................................................................................................... 19FUTURE WORK.................................................................................................................... 19REFERENCES ...................................................................................................................... 20v