Investigation of spatial and short-term temporal nearshore sandy sediment strength using a portable free fall penetrometer

Albatal, Ali; Wadman, Heidi; Stark, Nina; Bilici, Cagdas; McNinch, Jesse E.

doi:10.1016/j.coastaleng.2018.10.013

Cited by 15 publications

(3 citation statements)

References 40 publications

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“…Although simple parameterizations have provided adequate results in terms of slumping rate and postevent profile shape, more physically based modeling of dune and foreshore processes based on soil-mechanics principles may be the key to improving models of dune stability and beach trafficability. Recent progress in sensors to rapidly characterize key soil properties, such as sediment strength and its relationship to wave energy, friction angle, and moisture content (Stark et al 2017, Albatal et al 2019, may lead to improved modeling of soil mechanics in morphodynamic models. However, with improved physical description of these processes will come a demand for more data regarding soil moisture, geological framework, and sediment characteristics, for which observations at the appropriate scale are often lacking.…”

Section: Processesmentioning

confidence: 99%

Modeling the Morphodynamics of Coastal Responses to Extreme Events: What Shape Are We In?

Sherwood

Dongeren

Doyle

et al. 2022

Annu. Rev. Mar. Sci.

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This review focuses on recent advances in process-based numerical models of the impact of extreme storms on sandy coasts. Driven by larger-scale models of meteorology and hydrodynamics, these models simulate morphodynamics across the Sallenger storm-impact scale, including swash, collision, overwash, and inundation. Models are becoming both wider (as more processes are added) and deeper (as detailed physics replaces earlier parameterizations). Algorithms for wave-induced flows and sediment transport under shoaling waves are among the recent developments. Community and open-source models have become the norm. Observations of initial conditions (topography, land cover, and sediment characteristics) have become more detailed, and improvements in tropical cyclone and wave models provide forcing (winds, waves, surge, and upland flow) that is better resolved and more accurate, yielding commensurate improvements in model skill. We foresee that future storm-impact models will increasingly resolve individual waves, apply data assimilation, and be used in ensemble modeling modes to predict uncertainties. Expected final online publication date for the Annual Review of Marine Science, Volume 14 is January 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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Section: Processesmentioning

confidence: 99%

Modeling the Morphodynamics of Coastal Responses to Extreme Events: What Shape Are We In?

Sherwood

Dongeren

Doyle

et al. 2022

Annu. Rev. Mar. Sci.

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“…In nearshore zones, significant variations in geotechnical properties of seabed surface sediments occur and are associated with changes in wave action and local sediment dynamics [20,46,49]. These variations affect erodibility [12][13][14][15].…”

Section: Integration Of Geotechnical Information For Use In Coastal G...mentioning

confidence: 99%

“…Sediment type distributions as well as geotechnical properties of seabed and coastal sediments are complex in the Arctic [17]. Geotechnical properties are affected by coastal geomorphodynamics [20], representing a feedback loop between geotechnical sediment properties and hydrodynamically driven geomorphodynamics [21]. In Arctic and sub-Arctic environments, geotechnical properties may vary even more widely and in a more complex manner from changes in cohesion from freeze-thaw cycles or ice content [22,23].…”

Section: Introductionmentioning

confidence: 99%

Geotechnical Measurements for the Investigation and Assessment of Arctic Coastal Erosion—A Review and Outlook

Stark

Green

Brilli

et al. 2022

JMSE

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Geotechnical data are increasingly utilized to aid investigations of coastal erosion and the development of coastal morphological models; however, measurement techniques are still challenged by environmental conditions and accessibility in coastal areas, and particularly, by nearshore conditions. These challenges are exacerbated for Arctic coastal environments. This article reviews existing and emerging data collection methods in the context of geotechnical investigations of Arctic coastal erosion and nearshore change. Specifically, the use of cone penetration testing (CPT), which can provide key data for the mapping of soil and ice layers as well as for the assessment of slope and block failures, and the use of free-fall penetrometers (FFPs) for rapid mapping of seabed surface conditions, are discussed. Because of limitations in the spatial coverage and number of available in situ point measurements by penetrometers, data fusion with geophysical and remotely sensed data is considered. Offshore and nearshore, the combination of acoustic surveying with geotechnical testing can optimize large-scale seabed characterization, while onshore most recent developments in satellite-based and unmanned-aerial-vehicle-based data collection offer new opportunities to enhance spatial coverage and collect information on bathymetry and topography, amongst others. Emphasis is given to easily deployable and rugged techniques and strategies that can offer near-term opportunities to fill current gaps in data availability. This review suggests that data fusion of geotechnical in situ testing, using CPT to provide soil information at deeper depths and even in the presence of ice and using FFPs to offer rapid and large-coverage geotechnical testing of surface sediments (i.e., in the upper tens of centimeters to meters of sediment depth), combined with acoustic seabed surveying and emerging remote sensing tools, has the potential to provide essential data to improve the prediction of Arctic coastal erosion, particularly where climate-driven changes in soil conditions may bias the use of historic observations of erosion for future prediction.

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Relating side scan sonar backscatter data to geotechnical properties for the investigation of surficial seabed sediments

2023

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Side scan sonar is a common tool for seafloor imaging and surveying due its efficiency and high resolution. The backscatter information from side scan sonar enables to identify sediment types and seabed roughness, often used to study sediment dynamics. Theory suggests that side scan sonar backscatter can be correlated to the geotechnical properties of the seabed surface. This could enhance the prediction of erodibility and efficiency of seabed sediment characterization, considering that side scan sonar can offer large spatial coverage in a short time. In this study, high-frequency (1000 kHz) side scan sonar backscatter data, sediment samples, and in-situ seabed strength profiles were collected of the seabed surface at ten locations. Statistical analysis of the backscatter data compared with geotechnical data showed trends between mean backscatter, soil strength, and textural sediment properties. Generally, mean backscatter increased when sediment strength and mean grain size increased and when water content and fines content decreased. However, roughness from bedforms, the presence of oysters, shell hash as well as variations in water content (i.e., porosity) of the seafloor heavily influenced the backscatter and sometimes masked any relationships with the strength properties directly.

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Investigation of spatial and short-term temporal nearshore sandy sediment strength using a portable free fall penetrometer

Cited by 15 publications

References 40 publications

Modeling the Morphodynamics of Coastal Responses to Extreme Events: What Shape Are We In?

Modeling the Morphodynamics of Coastal Responses to Extreme Events: What Shape Are We In?

Geotechnical Measurements for the Investigation and Assessment of Arctic Coastal Erosion—A Review and Outlook

Relating side scan sonar backscatter data to geotechnical properties for the investigation of surficial seabed sediments

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