The erosion threshold, beyond which bed sediments start to move, is a key parameter describing sediment transport processes. For silt-dominated mixtures, in the grain size between sand and clay, existing experimental studies exhibit contradictory observations. That is, was either sand-like or clay-like, suggesting transitional behavior. To explore underlying mechanism of behavior silt-sized sed...

the river kabini which is tributary of cauvery drains through industrial area at nanjangud, karnataka. out of the sediment load carried by the river, 2micron the clay fraction was analyzed for total heavy metal contents and advanced statistical techniques such as cluster analysis and correlation matrix were applied in order to investigate the source of heavy metal concentration in the sediments...

Abstract Deep-sea polymetallic nodule mining research activity has substantially increased in recent years, but the expected level of environmental impact is still being established. One concern discharge a sediment plume into midwater column. We performed dedicated field study using from Clarion Clipperton Fracture Zone. The was monitored and tracked both established novel instrumentation, inc...

We examined faunal community responses to oxygen and organic matter gradients across the lower oxygen minimum zone (OMZ) on the bathyal Pakistan margin, where sediments grade from fully laminated sediment at 700m (0.12mLL 1 O2 [5mM]) to highly bioturbated sediment at 1100m (0.23mLL 1 O2 [10mM]). High-resolution sampling of the seafloor (every 50m water depth) was conducted along a single transe...

A new parameterisation for the threshold shear velocity to initiate deflation of dry and wet particles is presented. It is based on the balance of moments acting on particles at the instant of particle motion. The model hence includes a term for the aerodynamic forces, including the drag force, the lift force and the aerodynamic moment force, and a term for the interparticle forces. The effect ...

The dynamics of river bedforms is still not well understood and detailed experimental investigation may provide significant insight into the process mechanisms. In this study, results are presented for a laboratory experiment that returned long time series sediment kinematics bed-load dunes. run was performed in closed conduit but, light prior literature, also representative dunes under open-ch...

[1] The channel head represents an important transition point from hillslope to fluvial processes. There is a nonlinear threshold transition across the channel head with sediment transport much larger in channels than on hillslopes. Deterministic specific catchment area, a, thresholds for channel initiation, sometimes dependent on slope, S, in the form of aS C, have been suggested. In this pape...