Groundwater Subsoil Permeability 1:40,000 Ireland (ROI) ITM Geological Survey Ireland

Subsoil is the layer of soil under the topsoil and on top of the bedrock. The ease with which water can pass through the subsoil is known as the ‘permeability’. The subsoil permeability affects how easily rainwater can soak down into the ground and fill up the groundwater resourc