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Test to measure permeability in permeable or semi-permeable soils. The test measures the flow needed to maintain a constant water level in a well (static load) or, alternatively, the water level decay velocity (variable load).
Test to estimate the permeability in rocky soils, measuring the water flow that can be injected at constant pressure in different well sections.
A rotating instrument is utilized to measure the fluid flow inside a well. An helicoidal-shaped (blade) rotor gains a certain rotation speed which is related to the effective flow velocity.