caa a22 4500 445364815 CHVBK 20180317142926.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s11001-011-9116-2 doi (NATIONALLICENCE)springer-10.1007/s11001-011-9116-2 Sediment identification using free fall penetrometer acceleration-time histories [Elektronische Daten] [Gopal Mulukutla, Lloyd Huff, Jeffrey Melton, Kenneth Baldwin, Larry Mayer] Knowledge of physical properties of near-surface sediments is an important requirement for many studies of the seafloor. Dynamic or Free Fall Penetrometers (FFP), instrumented with accelerometers, are widely used to assess the mechanical properties of the sediment by deriving penetration resistance from the deceleration response of the probe as it impacts and embeds the seabed. Other field investigations, a priori knowledge or a very basic description of the type of sediment (such as a description of the sediment as soft, medium or hard) derived from studying the deceleration response (accelerometer-time histories) are used for sediment identification prior to the application of an appropriate strength determination model. In many cases this information is site-specific and in others the penetration resistance is overestimated due to the dilatory effects observed in sediment with an undetected grain fraction. In this study variables affecting a dynamic penetrometer-sediment interaction system are identified. Using data from field investigations and literature we found a relationship among five variables: peak acceleration, embedment depth, total embedment time, velocity of impact and grain size. This is used to formulate a sediment identification model. The model accounts for variables that may vary widely within one deployment and it can be applied to other FFPs with different physical characteristics (such as a different mass or size). This may lead to the increased use of FFP as a deployment tool for rapid in situ characterization of the seafloor. Springer Science+Business Media B.V., 2011 Free fall penetrometer nationallicence Acceleration-time histories nationallicence Surficial sediment nationallicence Peak acceleration nationallicence Embedment depth nationallicence Mulukutla Gopal Complex Systems Research Center, University of New Hampshire, 03824, Durham, NH, USA aut Huff Lloyd Center for Coastal and Ocean Mapping, University of New Hampshire, 03824, Durham, NH, USA aut Melton Jeffrey Department of Civil Engineering, University of New Hampshire, 03824, Durham, NH, USA aut Baldwin Kenneth Center for Ocean Engineering, University of New Hampshire, 03824, Durham, NH, USA aut Mayer Larry Center for Coastal and Ocean Mapping, University of New Hampshire, 03824, Durham, NH, USA aut Marine Geophysical Research Springer Netherlands 32/3(2011-09-01), 397-411 0025-3235 32:3<397 2011 32 11001 https://doi.org/10.1007/s11001-011-9116-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11001-011-9116-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mulukutla Gopal Complex Systems Research Center, University of New Hampshire, 03824, Durham, NH, USA aut NATIONALLICENCE 700 1- Huff Lloyd Center for Coastal and Ocean Mapping, University of New Hampshire, 03824, Durham, NH, USA aut NATIONALLICENCE 700 1- Melton Jeffrey Department of Civil Engineering, University of New Hampshire, 03824, Durham, NH, USA aut NATIONALLICENCE 700 1- Baldwin Kenneth Center for Ocean Engineering, University of New Hampshire, 03824, Durham, NH, USA aut NATIONALLICENCE 700 1- Mayer Larry Center for Coastal and Ocean Mapping, University of New Hampshire, 03824, Durham, NH, USA aut NATIONALLICENCE 773 0- Marine Geophysical Research Springer Netherlands 32/3(2011-09-01), 397-411 0025-3235 32:3<397 2011 32 11001 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer