Alternative barrier layers for surface covers in dry climates
Surface covers are one of the most widespread remediation and waste management options in all climates. Barrier layers to limit percolation through cover systems are principal features of engineered, multi-component cover designs. Conventional barrier layer components developed for humid climates have limitations in dry climates. One alternative barrier layer is a capillary barrier, which consists of a fine-over-coarse soil arrangement. The capacity of capillary barrier to laterally divert downward moving water is the key to their success. Another alternative is a dry barrier, in which atmospheric air is circulated through a coarse layer within the cover to remove water vapor. Incorporating a coarse layer which stores water for subsequent removal by air flow reduces the requirements for the air flow velocity and increases the applicability of the dry barrier.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 10182743
- Report Number(s):
- SAND-94-2248C; CONF-9409203-1; ON: DE94018908; BR: GB0103012; TRN: 94:020143
- Resource Relation:
- Conference: Geo-environmental issues facing the Americas,Mayaguez (Puerto Rico),20 Sep 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
RADIOACTIVE WASTE DISPOSAL
COVERINGS
DESIGN
ARID LANDS
GROUND DISPOSAL
SOILS
WATER INFLUX
CONTROL
CLAYS
LINERS
MEMBRANES
CAPILLARY FLOW
HYDRAULIC CONDUCTIVITY
SANITARY LANDFILLS
052002
054000
WASTE DISPOSAL AND STORAGE
HEALTH AND SAFETY