| Popis: |
A comparison of the geotechnical properties of beach fill vs. borrow area sediments for the fifth Hunting Island (SC) beach nourishment project is presented in this paper. Sediment samples were taken from the beach and borrow area to characterize pre-nourishment (1990) and post-nourishment (1993) conditions. Grain-size frequency curves were developed for these samples which were then used to perform the geotechnical analyses. The results indicate that post-nourishment profile stability can be improved measurably by variations in grain-size distribution, specifically where a coarse fraction is present (i.e., negative skewness). In other words, by using borrow sediments that are coarser than native, the nourished profile will adjust to a steeper configuration, producing a wider dry beach. Other factors influencing profile durability include fill placement techniques and environmental factors (waves, currents, storms, etc.). |
Full Text from ScienceDirect