scholarly journals Retention of Sediments and Nutrients in the Iron Gate I Reservoir on the Danube River

2005 ◽  
Vol 76 (3) ◽  
pp. 539-565 ◽  
Author(s):  
Cristian Teodoru ◽  
Bernhard Wehrli
Keyword(s):  
Danube River ◽  
The Danube River ◽  
Iron Gate

Emerging contaminants in sediment core from the Iron Gate I Reservoir on the Danube River

2019 ◽  
Vol 662 ◽  
pp. 77-87 ◽  
Author(s):  
Ivana Matić Bujagić ◽  
Svetlana Grujić ◽  
Mila Laušević ◽  
Thilo Hofmann ◽  
Vesna Micić
Keyword(s):  
Sediment Core ◽  
Emerging Contaminants ◽  
Danube River ◽  
The Danube River ◽  
Iron Gate

Macroinvertebrates along the Serbian section of the Danube River (stream km 1429–925)

Biologia ◽  
2007 ◽  
Vol 62 (2) ◽  
Author(s):  
Momir Paunovic ◽  
Dunja Jakovcev-Todorovic ◽  
Vladica Simic ◽  
Bojana Stojanovic ◽  
Predrag Cakic
Keyword(s):  
Species Richness ◽  
Correspondence Analysis ◽  
Distribution Patterns ◽  
Danube River ◽  
Qualitative Composition ◽  
Aquatic Macroinvertebrate ◽  
The Danube River ◽  
Iron Gate ◽  
Species Richness And Abundance ◽  
Macroinvertebrate Fauna

AbstractResults of the investigation of the aquatic macroinvertebrate fauna along a 504 km stretch of the Danube River in Serbia are presented. A total of 74 macroinvertebrate taxa were observed during a 2001 survey. Oligochaeta and Mollusca were the principal components of the community with regard to species richness and abundance. Based on data on the qualitative composition of the macroinvertebrate fauna, a correspondence analysis divided the investigated stretch in three sectors — upper (Pannonian), Iron Gate sector and entrance sector to the Iron Gate stretch. The distribution patterns of certain species supported the division of sectors defined by correspondence analysis.

scholarly journals Spatial distribution of multielements including lanthanides in sediments of Iron Gate I Reservoir in the Danube River

2021 ◽  
Author(s):  
Otilia Ana Culicov ◽  
Tatjana Trtić-Petrović ◽  
Roman Balvanović ◽  
Anđelka Petković ◽  
Slavica Ražić
Keyword(s):  
New Technologies ◽  
Environmental Fate ◽  
Hot Spot ◽  
Major And Trace Elements ◽  
Danube River ◽  
The Danube River ◽  
Iron Gate ◽  
Time Period ◽  
Two Samples ◽  
Deep Sediments

AbstractRecent studies show that lanthanides (Ln) are becoming emerging pollutants due to their wide application in new technologies, but their environmental fate, transport, and possible accumulation are still relatively unknown. This study aims to determine major and trace elements including Ln in the Danube River sediment which either belong or close to the Iron Gate Reservoir. The Iron Gate Reservoir is characterized by accumulation of sediments as an effect of building hydropower dam Iron Gate I. The surface sediments were collected on the Danube River—1141 to 864 km and three tributaries along this waterway. Two samples of deep sediments were used for comparison. The results indicate the significant upward enrichment of Zn, Sb, Cr, Nd, and Dy in sediments belongs to the Iron Gate Reservoir. The sample 4-Smed is labelled as a hot spot of contamination with Zn, Cr, As, Sb, Nd, and Dy. Also, a trend of increasing concentration in the time period from 1995 to 2016 was found for elements Zn, Cr, and Ni in sediment samples in the Iron Gate Reservoir. Chemometric analysis shows the grouping of sample sites into clusters characterized by the following properties: (i) increased concentration of all measured elements (samples within the Iron Gate Reservoir); (ii) increased Cu concentration (11-Pek); and (iii) lower concentrations of the measured elements (deep sediments). The data presented hereby contribute to the monitoring of pollution of the River Danube sediments and give the first view of Ln profile in the studied sediments.

scholarly journals Spatial Distribution of multielements including technology critical elements in sediments of the Danube River

2020 ◽  
Author(s):  
Otilia Ana Culicov ◽  
Tatjana Trtic-Petrovic ◽  
Roman Balvanović ◽  
Anđelka Petković ◽  
Slavica Ražić
Keyword(s):  
Spatial Distribution ◽  
Surface Sediments ◽  
New Technologies ◽  
Analytical Data ◽  
Danube River ◽  
The Danube River ◽  
Critical Elements ◽  
Iron Gate ◽  
Hydropower Dam ◽  
Two Samples

Abstract Background The pollution of the second-longest European river (the river Danube) has been under monitoring and focused on various contaminants including metals/metalloids (Hg, As, Ni, Zn, Cu, Cr, Pb, and Cd), personal care products, technical additives, pesticides, pharmaceuticals, etc. Recent studies show that technology critical elements (TCE) – elements with a high supply risk and economic importance – are becoming emerging pollutants due to their wide application in new technologies. According to the European Union Water Framework Directive, sediments are one of the three major sources of river pollution. This study aims to determine major and trace elements including some TCEs in the Danube River sediment. The concentrations of the targeted elements in the surface sediments were discussed in the sense of the effect of building hydropower dam Iron Gate I and increasing the quantity of sediments in the Iron Gate gorge. Results The surface sediments were collected on the Danube River-km 1141 to 864 and three tributaries along this waterway. Two samples of deep sediments were used for comparison. Instrumental Neutron Activation Analysis was applied for quantification of 36 elements, with special attention to selected TCE belonging to lanthanides (La, Ce, Nd, Sm, Eu, Gd, Tb, Dy, Tm, and Yb). Spatial distribution is discussed (i) in the total pool of all analyzed elements and (ii) only lanthanides. For better understanding and to highlight a hidden relationship between targeted elements, multivariate statistical techniques (cluster analysis and principal component analysis) were applied to analyze the analytical data and to identify possible pollution sources. The obtained results of the targeted elements in the surface sediments were discussed in relation to the influence of hydropower dam Iron Gates I and the increasing quantity of sediments. Conclusion Overall results show increasing concentration of almost all investigated elements in the surface sediments from the Danube River-km 1112 to the dam. Sediment od the River Pek was separated as a location with extreme anthropogenic influence due to close vicinity of the copper mining site.

scholarly journals Results of investigating the macroinvertebrate community of the Danube River on the sector upstream from the Iron Gate (km 1083-1071)

2005 ◽  
Vol 57 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Momir Paunovic ◽  
Vladica Simic ◽  
Dunja Jakovcev-Todorovic ◽  
Bojana Stojanovic
Keyword(s):  
Principal Components ◽  
Habitat Diversity ◽  
Aquatic Macroinvertebrates ◽  
Macroinvertebrate Community ◽  
Danube River ◽  
Faunal Composition ◽  
The Danube River ◽  
Iron Gate ◽  
The Given

The present work cites results of investigating aquatic macroinvertebrates of the Danube River on the sector upstream from the Iron Gate (KM 1083-1071). The investigated part is interesting from the hydrobiological standpoint above all due to differences of faunal composition in relation to higher sections that could be expected in view of differences in overall characteristics of the river. A rich macroinvertebrate community (84 taxa) was observed. The diversity of taxa is primarily a result of habitat diversity within the given stretch. Oligochaeta and Mollusca were the principal components.

scholarly journals Biogenic silica accumulation in the sediments of Iron Gate I Reservoir on the Danube River

2006 ◽  
Vol 68 (4) ◽  
pp. 469-481 ◽  
Author(s):  
Cristian Teodoru ◽  
Aristidis Dimopoulos ◽  
Bernhard Wehrli
Keyword(s):  
Biogenic Silica ◽  
Danube River ◽  
The Danube River ◽  
Iron Gate

scholarly journals Reproducibility of age determination by scale and vertebra in pontic shad (Alosa pontica Eichwald, 1838), from the Danube

2009 ◽  
Vol 61 (2) ◽  
pp. 337-341 ◽  
Author(s):  
Zeljka Visnjic-Jeftic ◽  
Mirjana Lenhardt ◽  
I. Navodaru ◽  
A. Hegedis ◽  
Z. Gacic ◽  
...  
Keyword(s):  
Coefficient Of Variation ◽  
Age Determination ◽  
Danube River ◽  
Experienced Reader ◽  
Percent Error ◽  
The Danube River ◽  
Iron Gate

Specimens of Pontic shad (Alosa pontica Eichwald, 1838) were collected during April and May of 2006 in the Danube River (rkm 863) just downstream of the Iron Gate (Djerdap) II dam. Twenty-eight scales and 30 vertebrae were prepared and given to five interpreters with fish aging experience of from 3 to 30 years and with shad aging experience of from 0 to 12 years. Interpreters with experience in shad age determination showed lower values for the index of average percent error (IAPE) and an index of coefficient of variation (ICV). In regard to within-interpreter reproducibility, no significant differences were found between scale and vertebrae as structure for age determination. The most experienced reader showed the lowest value for IAPE, while the least experienced reader showed the highest value for IAPE. The results of this work indicate that experience in age determination by particular structure had more impact on age determination precision than specificity of structure, scale or vertebra. More work is needed on adopting standard protocols that must include some sort of common interaction between responsible age readers.

Silica retention in the Iron Gate I reservoir on the Danube River: the role of side bays as nutrient sinks

2006 ◽  
Vol 22 (4) ◽  
pp. 441-456 ◽  
Author(s):  
Daniel F. McGinnis ◽  
Serghei Bocaniov ◽  
Cristian Teodoru ◽  
Gabriela Friedl ◽  
Andreas Lorke ◽  
...  
Keyword(s):  
Danube River ◽  
The Danube River ◽  
Iron Gate ◽  
Nutrient Sinks ◽  
Silica Retention

Stream section types of the Danube River in Serbia according to the distribution of macroinvertebrates

Biologia ◽  
2013 ◽  
Vol 68 (2) ◽  
Author(s):  
Bojana Tubić ◽  
Vladica Simić ◽  
Katarina Zorić ◽  
Zoran Gačić ◽  
Ana Atanacković ◽  
...  
Keyword(s):  
Species Richness ◽  
Correlation Coefficients ◽  
Abundant Species ◽  
Danube River ◽  
Cluster Analyses ◽  
The Danube River ◽  
Backwater Effect ◽  
Iron Gate ◽  
Unio Tumidus ◽  
Lithoglyphus Naticoides

AbstractThe aim of this study was to use the data on the distribution of aquatic macroinvertebrates obtained from 14 sites within a 413 km long stretch of the Danube River in Serbia to show the relevance of the bordering zone between the Middle and Lower Danube. A total of 68 macroinvertebrate taxa were observed. Molluscs were the major component with regard to species richness and relative abundance. Lithoglyphus naticoides (C. Pfeiffer, 1828) was the most abundant species and Unio tumidus (Retzius, 1788) was the most frequent species. Product-moment correlation coefficients or Pearson r coefficient was used to analyse the relation between the sites based on macroinvertebrate distribution. The data obtained by product-moment correlation served as input for cluster analyses. According to a cluster analyses Danube River in Serbia could be separated in the free-flowing sector, the stretch with a backwater effect and the area of the Iron Gate.

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