| Autor: |
Garbesi, K., Robinson, A. L., Sextro, R. G., Nazarof, W. W. |
| Zdroj: |
Health Physics; Aug1999, Vol. 77 Issue 2, p183-191, 9p |
| Abstrakt: |
Soil permeability to air can increase substantially with measurement length scale. We tested the hypothesis that the scale effect could resolve large model underpredictions of radon and soil-gas entry into two experimental basement structures located in natural sandy-loam soil at a field site in Ben Lomond, CA. Previously, the model input for permeability at the site had been assessed based on 0.5-m scale measurements. After determining the soil-structure interaction scale (system scale) to be ∼3 m, the model input was changed to reflect 3-m scale permeability measurements. This adjustment reduced unacceptably large model underpredictions, of factor of 3 to 5, to a range near that of acceptable experiment error, 20 to 40%. The permeability scale effect may explain large and persistent model underestimates of radon entry into real houses. The results argue strongly for determining permeability at a length scale consistent with that of the system under study. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
