ABSTRACT
A description of the basic properties of geomorphological materials is frequently the most important starting point for an explanation of a geomorphological process. In geomorphological analysis, the incremental methods are mainly used in hydrometer and pipette methods. Cumulative methods show their advantages in that a small amount of sample is required and this leads to less interaction between the particles in the sample. Both methods use inexpensive apparatus but incremental are more rapid and accurate. Porosity is of geomorphological significance through its relationship with voids ratio and shears strength of materials, and is one of several factors that influence the permeability of material, although the exact relationship between porosity and permeability is indeterminate. Mass Bulk properties are fundamental physical parameters that help to define the nature of material. The coefficient of permeability is the rate of flow per unit area of sample under unit hydraulic gradient and thus relates to a particular fluid; for geomorphological purposes this is usually water.
