Permeability of Vacuum

The permeability of the underlying layer is less (lower) than that of the geological formation in the aquifer.

Aquifer means a subsurface layer or layers of geological strata of sufficient porosity and permeability to allow either a flow of or the withdrawal of usable quantities of groundwater.

Further studies had shown that substantial reduction of fumigant emissions could be achieved by adopting new low permeability barrier films or using methyl bromide and chloropicrin mixtures with lower concentrations of methyl bromide.

Aquifer means a subsurface layer or layers of rock or other geological strata of sufficient porosity and permeability to allow either a significant flow of groundwater or the abstraction of significant quantities of groundwater.

In the early 1990s, migratory movements had begun in the territory of the former Soviet Union and had affected Belarus, a country that attracted migrants owing to its geographical situation, the permeability of its northern, southern and eastern borders, its relative economic and social stability and the absence of ethnic conflicts.

The conceptual model provides information on the characteristics of the aquifer and its functioning. It includes a thorough hydrogeological evaluation of the various types of geological materials present in the aquifer. It also includes the illustration of the aquifer and its regional flow, the formulation of the water balance, the identification of recharge and discharge data, and the determination of the aquifer boundaries and its permeability and storage.