E3S Web Conf.
Volume 9, 20163rd European Conference on Unsaturated Soils – “E-UNSAT 2016”
|Number of page(s)||5|
|Section||Thermal and Chemical Effects|
|Published online||12 September 2016|
Vapor intrusion in soils with multimodal pore-size distribution
UNESP, Universidade Estadual Paulista, Departamento de Geologia, Rio Claro - SP, Brazil
a Corresponding author: email@example.com
The Johnson and Ettinger  model and its extensions are at this time the most widely used algorithms for estimating subsurface vapor intrusion into buildings (API ). The functions which describe capillary pressure curves are utilized in quantitative analyses, although these are applicable for porous media with a unimodal or lognormal pore-size distribution. However, unaltered soils may have a heterogeneous pore distribution and consequently a multimodal pore-size distribution , which may be the result of specific granulometry or the formation of secondary porosity related to genetic processes. The present paper was designed to present the application of the Vapor Intrusion Model (SVI_Model) to unsaturated soils with multimodal pore-size distribution. Simulations with data from the literature show that the use of a multimodal model in soils with such pore distribution characteristics could provide more reliable results for indoor air concentration, rather than conventional models.
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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