Design of dry barriers for containment of contaminants in unsaturated soils
- Univ. of Wollongong (Australia)
- Univ. of New Mexico, Albuquerque, NM (United States)
A dry barrier is a region of very dry conditions in unsaturated soil that prevents vertical migration of water created by circulating dry air through the formation. Dry soil creates a barrier to vertical water movement by decreasing the soil`s hydraulic conductivity, a concept also used in capillary barriers. A dry barrier may be a viable method for providing containment of a contaminant plume in a setting with a thick unsaturated zone and dry climate. The principal factors which determine the feasibility of a dry barrier include: (1) an and environment, (2) thick vadose zone, and (3) the ability to circulate air through the vadose zone. This study investigated the technical and economic considerations associated with creating a dry barrier to provide containment of a hypothetical 1 ha aqueous contaminant plume. The concept appears to be competitive with other interim containment methods such as ground freezing.
- Research Organization:
- USDOE, Washington, DC (United States)
- OSTI ID:
- 576619
- Report Number(s):
- CONF-970208--Proc.; ON: DE98001967
- Country of Publication:
- United States
- Language:
- English
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