Minipumping

The minipumping test is a hydrogeological test performed in a borehole with a 50mm diameter pump. This allows a pumping in the borehole in which it has been installed a small diameter piezometric tube.

The extraction capacity of the pump varies according the depth at which it is installed. The flow can range from 24.3m3/h at 5m depth to 0.8m3/h at 80m depth.

During the pumping test the piezometric level has to be controlled, both in the extraction borehole point and in the nearby points that may be, to study the ground response in front of the piezometric disruption and thus get the equivalent transmissivity of the test section.

This test allows estimating the effective permeability of the material studied in a local medium and it has a largest affect in the medium than slug tests.