Dual Porosity Aquifers

​​In dual porosity aquifers, the main storage of water occurs in the intergranular pore spaces, and the main groundwater transmission system is the fracture system in the rock.

Diagram of Sedimentary Aquifer.

These are known as dual porosity aquifers, and their permeability reflects the frequency, openness and interconnectivity of the fractures. These aquifers are often the sedimentary rocks in Tasmania.