Sediment Transport in Aquatic Environments is a book which covers a wide range of topics. The effective management of many aquatic environments, requires a detailed understanding of sediment dynamics. This has both environmental and economic implications, especially where there is any anthropogenic involvement. Numerical models are often the tool used for predicting the transport and fate of sediment movement in these situations, as they can estimate the various spatial and temporal fluxes.
Severe chemical contamination was found in ash contaminated
soil samples from open burning sites at both Agbogbloshie and
Korforidua, as well as in sediment from a shallow lagoon at the
Agbogbloshie site. Most samples contained numerous toxic and
persistent organic chemical pollutants, as well as very high levels of
many toxic metals, the majority of which are either known to be used
in electronic devices, or are likely to be formed during the open-
burning of materials used in such devices.
Morphology change at tidal influent estuary is controlled by the net sediment transport rate of river and tidal transport, and variations in features (bathymetry, structures, etc.) where scour and shoaling take place. To examine river and tidal exchange sediment transport in a systematic way, we investigated sediment transportation at the Bach Dang estuary with a coupled tide, wave and sediment transport-morphology change numerical modeling system. Five simulations consisting of
After some further kilometres,
sodium begins to increase by ion exchange at the expense of calcium, producing a natural
softening of the water. Eventually, the available calcium in the water is exhausted, but sodium
continues to increase to a level greater than could be achieved purely by cation exchange. As
chloride also begins to increase, this marks the point at which recharging water moving
slowly down through the aquifer mixes with much older saline water present in the sediments
A method for determination of arsenic species in environmental samples have been studied (water and sediment of Nhatrang onshore). The analytical method used was ion-exchange liquid
chromatography coupled on-line to atomic absorption pectrometry through hydride generation. It was applied to determination of As species in H3PO4+NH2OH.HCl extracts of sediments. The
efficiency of this extraction procedure was studied in details. The sensibility of this investigated method allows both the analysis of As-poor samples and the dilution extracts, of As-rich ones.