Elmira Khaksar Najafi - Teacher of Ayandegan University Iran-Mazandaran Geotechnical Engineer

Todays, we are witnesses to occur phenomena that is not justified with the principles of classical geotechnical.Suffusion is such process that frequently occurs due to urbanization and cities development in the regions that no experience was access about their soil properties. In Suffusion phenomenon, soil particles are eroded due to water flow. The parameters involved in occurring such type of erosion, is different from factors affecting of soil erosion in classical geotechnical. Suffusion is often considered in hydraulic structures such as dams. In this research a new method is presented to identify unstable soils based on information obtained from the aggregation curve of soils.

suffusion, internal instability, aggregation curve, curvature coefficient