Release of Rn-222 from some soils

Measurements have been made of Rn-222 release from diverse soils in the region surrounding Malaga, Spain. These flux measurements were carried out by two methods. A direct method using a static chamber technique and another indirect method obtained from concentration profile measurements of Rn-222 in the soil air. The effects of meteorological variables and other parameters Rn-222 flux were studied. The factors that most affected the instantaneous value of Rn-222 release were humidity and soil thermal gradient. The directly measured Rn-222 fluxes at investigated sites are higher than Rn-222 fluxes derived by the indirect method.