The combination of oceanographic processes and a negligible fluvial terrestrial sediment contribution makes the Santos Basin margin (southwestern Brazil) unique environment for studying thew morphological imprint bottom currents on seafloor morphology. We divide into four domains: outer shelf, upper, middle, lower slope, based an analysis sub-bottom Chirp profiles, multichannel seismic data, hy...

In order to study the seepage process of rainwater on granite residual soil cut slopes, a numerical model for analysis slopes was established. Then, by applying rainfall boundary condition, path slope analyzed under condition infiltration. Finally, during seepage, volumetric water content and pore-water pressure change characteristics inside were analyzed, mechanism in revealed. The results sho...

Several problems of current interest involve elastic bottom range-dependent ocean environments with buried or earthquake-type sources, specifically oceanic T-wave propagation studies and interface wave related analyses. Additionally, observed deep shadow-zone arrivals are not predicted by ray theoretic methods, and attempts to model them with fluid-bottom parabolic equation solutions suggest th...

The development of radar altimetry over rivers along the past 20 years has shown a strong potential to provide hydrologist with valuable information on river water level dynamics. The development of new sensors and satellite mission concepts such as spatial interferometry or temporal interferometry opens midterm (10-20 years) perspectives for the spatialized measurement of river surface variabl...

Cold-water corals and their associated mounds and reefs attracted a growing number of marine geologists to study these biogenic structures in detail, since these mounds may represent modern analogs to the well-known mound structures from Paleozoic and Early Mesozoic times. A key to better understand the distribution and frame building potential of cold-water corals is to correctly monitor their...

A series of laboratory experiments was conducted to obtain high-quality data for acoustic propagation in shallow water waveguides with sloping elastic bottoms. Accurate modeling of transmission loss in these waveguides can be performed with the variable rotated parabolic equation method. Results from an earlier experiment with a flat or sloped slab of polyvinyl chloride (PVC) demonstrated the n...

A layer of shallow-water dolostone (“cap dolostone”) with idiosyncratic sedimentary structures was deposited across continental margins world-wide in the aftermath of the terminal Cryogenian snowball Earth. The dolostone has a global average thickness of 18.5 m and is interpreted stratigraphically in different ways in the current literature: as diachronous (top and bottom) and tracking glacioeu...

A novel range-dependent propagation effect occurs when a source is placed on the seafloor in shallow water with a downward refracting sound speed profile, and sound waves propagate down a slope into deep water. Under these conditions, small grazing-angle sound waves slide along the bottom downward and outward from the source until they reach the depth of the sound channel axis in deep water, wh...

Aerators with sharp lateral enlargements and bottom drops generally cause adverse effects in spillway tunnels a mild base slope, including serious cavity back flow water wings striking the tunnel roof. Taking RM Hydropower Station’s as its example, this paper proposes new type of combined aerator characterized by “variable slope” longitudinally transverse “sharp enlargement plus straight sectio...