I have a few queries regarding permeability testing and applicability.
Geology for my site consists of ~6m of clayey silt, overlying a saturated sand and gravel deposit. The sand and gravel deposit is the source of the towns groundwater so I assume that the recharge rate must be fairly high. I have a couple of wells installed, (50mm diameter, with slotted lower casings). One well is installed with the slotted pipe in the gravel layer, sand around the screen, and then is sealed from the top of the screen to the surface with bentonite. The other well is installed in the clayey silt, similar installation details.
It seems to me that there are two ways I could test the permeability: I could add water to the pipe, and then measure how long it takes for the head to drop; or, I could pump/bail the water out and measure how fast it takes to recharge.
Would both methods give the same permeability?