The models of spatial erosion distribution and sloping surface erosion were developed with a lot of data obtained by the new method, namely Fixed Soil Core Eu(europium) Tracer(FSCET).

,the characteristics of carbon brick annular crack and abnormal erosion at hearth are very obvious.

After analysing the acoustic data and the difference blocks geotechnical data of the modern Huanghe estuary, we find that the differential erosion and failure behvior of soil in the slope are controlled by sedimental geotechnical properties: The counter failure ability of soil with a low clay content(<10%), high water content(30%~45%) and large void ratio(0.