2014
DOI: 10.1016/j.coastaleng.2013.10.009
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Beach nourishment effects on sand porosity variability

Abstract: A standard assumption in coastal engineering is that the porosity of natural beach sand (non-cohesive) is 40%. However, is this assumption correct for all beach sand? This paper proposes an accurate and simplified method to assess changes in sand porosity after beach nourishment by means of in-situ density surveys through a nuclear densimeter. This novel application has been applied to different beaches in the southwest of Spain according to the tidal range, grain size and beach morphology in several terms. Ge… Show more

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Cited by 33 publications
(25 citation statements)
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“…The beach dynamics tend always to homogenization of the sediment with time. Detailed characterization of the porosity of the refill sand should be accomplished in order to achieve the optimal performance of the nourishment tasks (Roman-Sierra et al, 2014). Belgium coast is highly antrophized since historical times.…”
mentioning
confidence: 99%
“…The beach dynamics tend always to homogenization of the sediment with time. Detailed characterization of the porosity of the refill sand should be accomplished in order to achieve the optimal performance of the nourishment tasks (Roman-Sierra et al, 2014). Belgium coast is highly antrophized since historical times.…”
mentioning
confidence: 99%
“…The error in sand volume estimation was somewhat lower in VB, probably due to the larger volume poured; 260,000 m 3 was measured into the hopper of the dredger vs. 283,000 m 3 surveyed on the beach, due to the increase of the porosity [43]. Another source of error was probably the existence of a problem at VB similar to that of RHB: the great variability of the levellings over the fringing reef.…”
Section: Nourishment Volumesmentioning
confidence: 98%
“…While trucks transported dewatered sand at RHB, at VB there was a massive dumping of a mixture of sediment (20%) and water (80%) onto the backshore and foreshore from a trailing suction hopper dredge. According to Roman-Sierra [43] this procedure causes a significant increase in sand porosity, which subsequently decreases until it reaches its native value (about a year later), due to wave action driving spatial re-accommodation of the grains. Moreover, much of the volume loss after beach nourishment procedure can be due to a decrease in porosity.…”
Section: Performance Of Nourishment Workmentioning
confidence: 99%
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“…As mentioned above, increasing research results have recently been published based on the soft-type method. As can be seen from the observation data, nourishment with gravel has the effect of reducing the sediment transport [5,[16][17][18]. In the work of [13], the researchers examined topographical variation by applying a drainage system with sand nourishment and a submerged breakwater in a physical model test.…”
Section: Introductionmentioning
confidence: 99%