Consequently, some of the agrochemicals can bypass the soil matrix and its capacity to store, absorb, and transform the solute. Thus, agrochemicals and nutrients can be carried to great depths, where degradation is limited (Boesten et al., 2000), possibly increasing the total amounts leached to groundwater. The preferential processes usually take place in what is often called macropores (Beven and Germann, 1982, 2013; Jarvis, 2007). In the literature, the term macropores is arbitrarily used for soil structural components like cracks, fissures, root channels, and earthworm borrows (Beven and German, 1982, 2013). These generally occur in soils with well-developed structures, that is, soils with silt or clay texture (Beven, 2018; Jarvis, 2007). Jarvis (2007) distinguishes between biologically induced macropores (e.g., root channels and earthworm borrows) termed biopores and macropores as a result of soil aggregation (e.g., fissures and cracks). In this work, the term biopores will be used to describe root channels, and earthworm borrows in which capillary effects are negligible. Artificial drainage is a common agricultural practice, which allows a field to be cultivated and increases crop production, but simultaneously can create new pathways for leaching of nutrients and agrochemicals to surface water (