Fill characterization and liquefaction potential

With my MSc student Clem Gibbens, from Greymouth, I investigated the importance of anthropogenic landscape modification in the Grey River estuary on the West Coast of the South Island. We used MASW to map the shear wave velocities of natural sediments, anthropogenic fill, and the boundary between these. We used maps dating back over 100 years to determine ages and relative ages of different fills and relate the fill quality to age. By applying the procedure of Andrus and Stokoe 2000, we found that the results provide an indication of the relative liquefaction potential arising from different ages and types of fills.