NAGRA Opalinus Clay (…002 - Version 1
FEP 15.2.13 Capillary rise

Capillary rise is a process by which solutes may move upwards through the soil profile from the water table (in the aquifer), under the following conditions: (1) evapotranspiration exceeds precipitation; (2) the storage capacity of the soil is insufficient to match evapotranspiration minus precipitation; (3) the soil texture is sufficiently fine for capillaries to be filled with water; (4) the water table is sufficiently near to the soil surface for the existence of continuous capillary water between aquifer and surface.