The effect of permeability on the erosion threshold of fine-grained sediments

The erosion of marine sediments, although difficult to predict, can lead important implications in offshore engineering, sedimentology and coastal management. Continued research is, therefore, warranted compile high-quality data from which develop models better predict the resistance different types sediments. In this paper, dimensional analysis is performed express threshold shear stress as a function selection soil properties that are commonly linked process To identify dominant dimensionless group, an experimental investigation on was carried out using fine-grained sediments were systematically prepared ensure variations (i) particle size distribution (i.e. fines content), (ii) bulk density, (iii) hydraulic permeability. samples included silica, carbonate each expected have limited or no clay-mineral content. measurements analysed compared with existing literature predictive models. It found sediment content showed good agreement empirical Shields curve, irrespective distribution, density contrast, for finer it these modify away curve. Across parameters only permeability appeared independently correlate observed range measurements. Motivated by finding, model introduced reference rate used define when reached. resulting expression shown quantitatively explain also agree quartz wide An apparent advantage new consistent studies due changes – including since affect