... exists. An environmental survey of nearshore and offshore marine sediments carried out in 2017, revealed concentrations of Arsenic nearly seven times higher than those permitted by law. These concentrations showed not necessarily correlated with the anthropogenic sources, thereby requiring supplementary...

... Abstract The non-dimensional bed shear stress in Osaka Bay by a tsunami caused by the Nankai Trough Earthquake was calculated, and the conditions under which the resuspension of marine sediments would occur were determined in every region of Osaka Bay. Resuspension does not occur...

... an original technic of sparse modeling, in which the discrimination between tsunami deposits and normal marine stratums has been investigated. marine sediment chemical component characteristic statistical analysis substance heavy metal prefecture arsenic northeastern japan discrimination...

... Improvement of Marine Sediment by Combined Electrokinetic and Chemical Treatment Pinghui Liu North China University of Water Resources and Electric Power Zhengzhou, Henan, China J.Q.Shang Department of Civil and Environmental Engineering University of Western Ontario London, Canada ABSTRACT...

...-drained triaxial tests performed according to DIN and BS on real marine sediments and on standard quartz sand. quartz sand consolidated-drained triaxial test shear rate kolymba din cohesion triaxial test standard quartz sand axial strain comparison study effective stress volumetric...

.... We continue to work for more detailed survey and analysis on the characteristics of tsunami sediments and soil contamination. tsunami sediment marine sediment coastal area risk assessment substance characteristic prefecture sediment geochemical survey geochemical map reconstruction...

... endpoint marine sediment reservoir upstream oil & gas subsurface storage Enhanced CO2 Geological Storage System using Gas Hydrates and Environmental Risk Assessment Takeshi Komai, Yasuhide Sakamoto and Atsuko Tanaka Research Institute for Geo-resources and Environment, National Institute...

... Evaluation of wave-induced residual pore pressure in marine sediments is a key factor in prediction of wave-induced liquefaction around coastal structures. Conventional models for wave-induced soil response have focused on regular wave loading. In this paper, we present a semi-analytical...

... significant differences in stress path response and overall strains and displacements. KEY WORDS: Elasto-plastic, slopes, marine sediments, modeling, OpenSees, finite elements INTRODUCTION Submarine slopes have captured the imagination of scientists ever since the Challenger expedition of 1872-1876 when...

... as a solid phase of gas hydrates. We present an experimental study on the formation behavior of CO 2 hydrate in sand layer simulated as marine sediments. The formation rate of CO 2 hydrate in sand layer was measured by Raman spectrometer and a bulk-scale experiment. The behavior of formation...

... resources of natural gas in the near future, because the large amount of reservoir exists in marine sediments or in permafrost regions worldwide (Okuda, 1993; Sato, 2001). Some extraction methods of gas hydrates from the reservoir in marine sediments has been proposed, such as depressurization, thermal...

... ABSTRACT Gas hydrate is one of the potential resources of natural gas in the near future, because it exists in marine sediments or in permafrost regions worldwide. We have designed and made the special type experimental apparatus, consisted of high-pressure vessel and sand column. Using...

... Fundamental Study on Gas Hydrate Recovery from Marine Sediments T. Komai*, Y. Yamamoto*, H. Haneda*, S.P. Kang T. Kawamura and K. Ohga *National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba, Ibaraki, Japan **Korea Advanced Institute of Science and Technology (KAIST...

... foundation. Two soils, namely, Yulchon clay (a natural marine sediment) and Welland sediment (a river sediment mixed with artificially prepared seawater), were tested. In each test, a steel plate was embedded in the soil to represent an element of a skirted foundation. Electrodes were installed...

... Properties of Marine Sediments from Acoustic Measurements Horst G. Brandes University of Hawaii Honolulu, HI, USA ABSTRACt : New acotistic seabed profiling systems have been introduced in the past 15 yeas that represent a quantum leap in our abilitY to, characterize the seafloor for geotechnical and other...

...-saturated sediment, i.e., with only dissolved gas in the porewater (no bubbles). In a study on the effects of gassy marine sediments for engineering, Sills and Wheeler (1992) concluded: "The presence of undissolved gas can change the soil response to external loading, associated with the compressibility...

... for the Interpretation of Measured Pore Pressures in Shallow Marine Sediments Glen R. Andersen Burns Cooley Dennis, Inc., Ridgeland, MS, USA Philip J. Valent Naval Research Laboratory, Stennis Space Center, MS, USA S. Peter Gonzales Drash Consulting Engineers, San Antonio, TX, USA ABSTRACT An analytical technique has...

... in a complex sequence of marine and terrestrial sediments in the Coastal Plain province. Marine sediments consist primarily of calcareous gravels, sands, and muds. This article discusses geotechnical properties of surficial calcareous and mixed shoreline sediments found on the northeast or windward coast...

... upstream oil & gas in-situ measurement marine sediment geotechnical module platform richardson seafloor probe facies sediment acoustic processing shear wave penetration strength artificial intelligence water depth geo-marine letter acoustic data ground seabed platform...

... in non-cohesive marine sediments. Once the upward seepage forces generated by excess pore pressure become greater than the self-weight of soils, a sedimentary bed may be liquefied, leading to seabed instability. This is the reason why this problem has attracted more attention from marine geotechnical...