2003年3月23日 · Sand ridges are elongated sand bodies that are larger and geographically more stable in comparison to dunes, being oriented at an oblique angle to the strongest current (Figs. 1 and 12). A sand ridge is composed of dunes and compound dunes of varied forms and sizes which migrate both on the stoss and lee sides of the ridge.

Three categories of large linear sand ridges can be distinguished: tidal ridges, shoreface-connected ridges and long bed waves. We discuss the characteristics of these three types of ridges, their occurrence and the way in which they are formed and maintained.

2020年12月10日 · Tidal sand ridges provide diverse habitats for aquatic life (van Dijk et al., 2012, Atalah et al., 2013) and dissipate wave energy during storms (Spencer et al., 2015), and in doing so, they preserve the stability of the offshore ecological environment.

1999年8月1日 · Sand banks and elongated sand ridges occur in many coastal and shelf seas where there is abundant sand and where the currents are strong enough to move sediment, but they have a wide variety of forms. Their generation requires a source of mobile sediment, either from the local sea bed, or from coast erosion.

2023年1月11日 · Sand ridges at the apex (Jianggang) are cut by grooves, and sand bodies are small, diverse, and disordered (i.e., a length of ∼4.4 km around Tiaozini, Figure 1C), whereas sand ridges are well developed with an average of ∼52 km in 13 major ridges outside the apex .

2018年9月19日 · Tidal sand ridges are large-scale rhythmic bedforms that are observed on the offshore parts of shelf seas where sand is abundantly available. Spacings between successive ridges are several kilometres, they evolve on centennial time scales, and their crests are cyclonically rotated with respect to the direction of the principal tidal currents.

2010年1月29日 · The high amplitude change of sea level resulting from the glacial-interglacial cycle is the main cause of the vast development of sand ridges on the ECS shelf. Abundant sediments on the shelf carried by the PYR (Paleo-Yangtze River) are the material source for the LSR formation, and the negative seafloor topography influences the strikes of LSR.

1999年1月1日 · Modern shelf sand ridges are elongate, coastal- to shelf-sand bodies that are larger than subaqueous dunes, with lengths of the order of 10 km and heights that are more than 20% of the water...

2015年1月1日 · Sand ridges are elongate coastal or shelf sand bodies that form bathymetric highs on the seafloor (Duane et al., 1972 ). Sand ridges are asymmetrical features composed of unconsolidated fine to coarse sand and gravel. They are typically 5-120 km long and 0.5-8 km wide, with heights of more than 20 % of the water depth and slopes of less than 1°.

2022年1月9日 · The radial sand ridges consist of more than 70 sand ridges that are spread out radially on the continental shelf of the South Yellow Sea. As a unique geomorphological feature in the world, its evolution process and characteristics are crucial to marine resource management and ecological protection.