Non-uniform grains are associated with which type of porosity?

Non-uniform grains typically characterize materials that have varying sizes, shapes, and distributions of particles. This non-uniformity can lead to lower overall porosity because the gaps between larger grains tend to be filled by smaller ones, preventing easy flow through the material. In this context, low porosity is indicated by the inability of the material to have large interconnected voids or spaces that facilitate water or fluid movement.

In geological terms, materials with low porosity often have a more heterogeneous grain structure, where the intergranular spaces do not effectively contribute to the total void volume. As a result, water or other fluids are less able to permeate the material, which is critical when considering the functionality and efficiency of on-site sewage facilities. Therefore, non-uniform grain distribution is most closely associated with low porosity due to these mechanical constraints in the arrangement of the particles.