Determination of Spatial and Seasonal Distribution of Surface Sediment Contamination in an Irish River and Estuarine System

2010 ◽  
pp. 20-20-26
Author(s):  
Conor J. Buggy ◽  
John M. Tobin
Keyword(s):  
Surface Sediment ◽  
Sediment Contamination ◽  
Seasonal Distribution ◽  
Estuarine System

Determination of Spatial and Seasonal Distribution of Surface Sediment Contamination in an Irish River and Estuarine System

2009 ◽  
Vol 6 (4) ◽  
pp. 102152
Author(s):  
Conor J. Buggy ◽  
John M. Tobin ◽  
Rosa Galvez ◽  
Mark Dyer ◽  
S. W. Dean
Keyword(s):  
Surface Sediment ◽  
Sediment Contamination ◽  
Seasonal Distribution ◽  
Estuarine System

scholarly journals Ecotoxicological assessment of sediments from the Santos and São Vicente estuarine system- Brazil

2006 ◽  
Vol 54 (1) ◽  
pp. 55-63 ◽  
Author(s):  
Augusto Cesar ◽  
Camilo Dias Seabra Pereira ◽  
Aldo Ramos Santos ◽  
Denis Moledo de Sousa Abessa ◽  
Nuria Fernández ◽  
...  
Keyword(s):  
Sediment Toxicity ◽  
Principal Component ◽  
Sediment Contamination ◽  
Estuarine Sediments ◽  
Toxicity Tests ◽  
Estuarine System ◽  
Chemical Analyses ◽  
Sediment Toxicity Tests ◽  
Close Relationship ◽  
Aquatic Food

Sediments represent an important repository of pollutants and a source of contamination for the aquatic food web. Toxicity tests using amphipods as test-organisms have been employed in the assessment of marine and estuarine sediments, together with chemical analyses. The present work aimed to evaluate the quality of sediments from six stations situated in the Santos and São Vicente Estuarine and Harbour System (São Paulo - Brazil) using acute whole sediment toxicity tests with amphipods (Tiburonella viscana) and chemical analyses of metals, PCB's, and PAH's. Other sediment parameters, such as organic carbon and grain size distribution were also analysed. Higher contamination levels were observed in the internal portion of the estuary, where Santos harbour and the industrial zone are located. The toxicity tests showed significant adverse results for most of the samples tested, and the sediments from the internal portion of the estuary presented the highest toxicity. The principal component analyses (PCA) indicated a close relationship between sediment contamination and toxicity. Positive correlation of these factors in the samples studied was used to establish the ranges of the chemical concentrations associated with adverse effects. Such ranges allowed the estimation of preliminary effect threshold values for sediment contamination, by means of multivariate analysis. These suggested values are: Cu, 69.0; Pb, 17.4; Zn, 73.3 (mg.kg-1); PAHs, 0.5 (mg.kg-1) and PCBs, 0.1 (µg.kg-1).

scholarly journals Determination of fish trophic levels in an estuarine system

2010 ◽  
Vol 86 (2) ◽  
pp. 237-246 ◽  
Author(s):  
S. Pasquaud ◽  
M. Pillet ◽  
V. David ◽  
B. Sautour ◽  
P. Elie
Keyword(s):  
Trophic Levels ◽  
Estuarine System

Determination of geochemical background values on a tropical estuarine system in a densely urban area. Case study: Capibaribe estuary, Northeastern Brazil

2017 ◽  
Vol 123 (1-2) ◽  
pp. 381-386 ◽  
Author(s):  
Diego de Arruda Xavier ◽  
Carlos Augusto Schettini ◽  
Elvis Joacir França ◽  
Rubens César Figueira ◽  
Roberto Lima Barcellos
Keyword(s):  
Urban Area ◽  
Northeastern Brazil ◽  
Estuarine System ◽  
Geochemical Background ◽  
Background Values ◽  
Tropical Estuarine

Seasonal distribution of aliphatic hydrocarbons in the Vaza Barris Estuarine System, Sergipe, Brazil

2016 ◽  
Vol 104 (1-2) ◽  
pp. 343-346 ◽  
Author(s):  
José Carlos S. Barbosa ◽  
Lukas G.G.V. Santos ◽  
Mércia V.S. Sant'Anna ◽  
Michel R.R. Souza ◽  
Flaviana C. Damasceno ◽  
...  
Keyword(s):  
Seasonal Distribution ◽  
Aliphatic Hydrocarbons ◽  
Estuarine System

RAINFALL EROSION INDICES FOR CANADA EAST OF THE ROCKY MOUNTAINS

1983 ◽  
Vol 63 (2) ◽  
pp. 271-280 ◽  
Author(s):  
G. J. WALL ◽  
J. GREUEL ◽  
W. T. DICKINSON
Keyword(s):  
Rocky Mountains ◽  
Water Conservation ◽  
Soil Loss ◽  
Distribution Patterns ◽  
Seasonal Distribution ◽  
Annual Rainfall ◽  
Rainfall Runoff ◽  
Runoff Factor ◽  
Rainfall Erosion

The use of the universal soil loss equation in Canada to estimate soil loss potential for soil and water conservation planning purposes has been limited by the lack of published rainfall erosion indices and by the arduous procedure generally accepted for determination of these indices. This study was conducted to develop and test relatively simple methods to develop annual rainfall erosion indices and associated seasonal distribution patterns. An approach to the determination of a rainfall-runoff factor to accommodate the effect of winter conditions has also been included. The relatively simple techniques for estimating average annual rainfall erosion indices and seasonal distribution patterns of rainfall erosion have been found to yield comparable values to those determined by more tedious methods. These erosion indices and associated distribution patterns have proven useful for the development of a first approximation of rainfall erosion maps for Canadian locations east of the Rocky Mountains. Key words: Rainfall erosion indices, USLE

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