Spatial distribution of sediment particles and trace element pollution within Gunnamatta Bay, Port Hacking, NSW, Australia

Abstract

A combination of geochemical analysis and hydrodynamic measuring has been established in order to provide an explanation for the spatial distribution of both sediment particles and trace element pollution Gunnamatta Bay, NSW, Australia. Fifty nine samples of surface sediment were collected to determine the spatial concentrations of trace elements in the bay. Moreover, current track pathways and velocities have been measured in the bay. The distribution of trace elements such as chromium, nickel, copper, zinc, arsenic and lead had similar patterns in surface sediments. Trace element pollution is concentrated along the current trajectory in the inner part of the bay, which has deeper sites and higher percentages of mud particles. The highest concentrations of these metals were found to be in sample GU55 from the northeast of the bay, which is close to a surface discharge point and moored boats. concentrations of these metals were found to be in sample GU55 from the northeast of the bay, which is close to a surface discharge point and moored boats.

Mineralogy and heavy metal assessment of the Pietra del Pertusillo reservoir sediments (Southern Italy)

“…Clay minerals largely affect metal clay retention (e.g., Mongelli 1995 ); Malla ( 2002 ) and Jones et al ( 2019 ), for instance, observed the effective adsorbing of 2 : 1 clay minerals of bivalent cations such as Cu, Pb, Cd, and Zn. The solubility of trace elements, such as Cu, Cr, Pb, and Zn (Alyazichi et al 2015 ), may be also associated to Mn oxides through coprecipitation and substitution and may increase when Mn is reduced (Negra et al 2005 ).…”

Experimental Design of Nature-Based-Solution Considering the Interactions between Submerged Vegetation and Pile Group on the Structure of the River Flow on Sand Beds

“…It can be deduced from the reduction of negative velocity values in the presence of vegetation that vegetation has been able to produce enough kinetic energy in the boundary layer around the pile to control to some extent the flow separation near the bed z. The dip parameter is the ratio of the depth below the water level from the bed floor (z) where the maximum velocity occurs (δ) to the depth of the stream (H) and is proposed in 1984 by Lakshiminarayana et al [43] in Equation (5).…”

“…The registered social consequences generated after such extreme events can be irreparable if control measures were not previously and efficiently installed [3,4]. Moreover, sediment transport has other environmental disadvantages, such as pollution mobilization, with a negative impact on aquatic life or agriculture fields [5,6]. Today, these hazards have attracted high attention due to the importance of transportation [7][8][9][10].…”