The FEL10 Drain Permeameter apparatus provides the students with a way of studying the interactions between drains, soils and filters in the laboratory.
The apparatus consists of a constant head permeator which allows the study of various combinations of soils, filters and drain types. Changes in permeability with time can be estimated by measuring the rate of drainage of water from the permeator.
The part of the soil/drain system which is changing its permeability can be inferred from the series of piezometer tubes which are connected to the cylinder of the permeator.
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