Water Quality Data Sharing on the Bulgarian-Romanian Reach of the Danube River Basin

1997 ◽  
pp. 199-207
Author(s):  
Atanas Paskalev
Keyword(s):  
Water Quality ◽  
Data Sharing ◽  
River Basin ◽  
Danube River ◽  
Quality Data ◽  
Water Quality Data ◽  
The Danube River ◽  
Danube River Basin

Identification of nitrate sources, hot spots, and dilution in the Danube River Basin using a multitracer approach

2020 ◽  
Author(s):  
Janine Halder ◽  
Yuliya Vystavna ◽  
Cedric Douence ◽  
Christian Resch ◽  
Roman Gruber ◽  
...  
Keyword(s):  
Water Quality ◽  
Stable Isotopes ◽  
River Basin ◽  
Danube River ◽  
Quality Data ◽  
The Black Sea ◽  
Main Stream ◽  
Water Quality Data ◽  
The Danube River ◽  
Danube River Basin

<p>The Danube is Europe`s second longest river, stretching from Germany to the Black Sea. Water quality in the Danube River Basin is regularly monitored by the national authorities of all riparian countries and in addition for specific water quality data during the Joint Danube Surveys (JSD), which is organised by the International Commission for the Protection of the Danube River every 6 years.</p><p>This study presents the results of water stable isotopes and stable isotopes (<sup>15</sup>N and <sup>18</sup>O) of nitrate as well as major ion analysis from 3 JDS (2001, 2007, 2019). Results indicate that water stable isotopes allow to trace differences in the amount of snowmelt contribution to the Danube and hence the dilution effects of pollutants e.g. nitrate. The oxygen and nitrogen isotope compositions of nitrate are clearly indicating that nitrate in the Danube main stream mainly derives from waste water effluents, which input is increasing along the stream. This can furthermore be confirmed by results of micropollutant studies that demonstrate an increase of widely consumed pharmaceuticals (carbamazepine, diclofenac and caffeine) at different sections of the Danube River affected by tributary inflows and discharge from urban settlements.</p><p>In summary, this study is an example of combining isotope techniques, hydrological methods but also emerging compounds in order to approach the fate of anthropogenically derived nitrate within the Danube Basin. The results of this study aim to support the 2021 update of the Danube River Basin Management Plan as well as water monitoring practices across the Danube countries.</p>

scholarly journals Multivariate Analysis of Water Quality Measurements on the Danube River

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3634
Author(s):  
Zoltan Horvat ◽  
Mirjana Horvat ◽  
Kristian Pastor ◽  
Vojislava Bursić ◽  
Nikola Puvača
Keyword(s):  
Water Quality ◽  
Principal Component Analysis ◽  
Multivariate Analysis ◽  
Cross Sections ◽  
Principal Component ◽  
Component Analysis ◽  
Danube River ◽  
Quality Data ◽  
Water Quality Data ◽  
The Danube River

This study investigates the potential of using principal component analysis and other multivariate analysis techniques to evaluate water quality data gathered from natural watercourses. With this goal in mind, a comprehensive water quality data set was used for the analysis, gathered on a reach of the Danube River in 2011. The considered measurements included physical, chemical, and biological parameters. The data were collected within seven data ranges (cross-sections) of the Danube River. Each cross-section had five verticals, each of which had five sampling points distributed over the water column. The gathered water quality data was then subjected to several multivariate analysis techniques. However, the most attention was attributed to the principal component analysis since it can provide an insight into possible grouping tendencies within verticals, cross-sections, or the entire considered reach. It has been concluded that there is no stratification in any of the analyzed water columns. However, there was an unambiguous clustering of sampling points with respect to their cross-sections. Even though one can attribute these phenomena to the unsteady flow in rivers, additional considerations suggest that the position of a cross-section can have a significant impact on the measured water quality parameters. Furthermore, the presented results indicate that these measurements, combined with several multivariate analysis methods, especially the principal component analysis, may be a promising approach for investigating the water quality tendencies of alluvial rivers.

scholarly journals Review on water quality assessment in the Danube river basin

2018 ◽  
Vol 41 (1) ◽  
pp. 189-195
Author(s):  
Mădălina Călmuc ◽  
◽  
Valentina A. Călmuc ◽  
Cătălina M. Țopa ◽  
Mihaela Timofti ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
River Basin ◽  
Water Quality Assessment ◽  
Danube River ◽  
The Danube River ◽  
Danube River Basin

Tracking the Origin of Moisture (and Moisture for Precipitation) over the Danube River Basin through a Lagrangian Approach

2016 ◽  
Author(s):  
Danica Ciric ◽  
Milica Stojanovic ◽  
Anita Drumond ◽  
Raquel Nieto ◽  
Luis Gimeno
Keyword(s):  
River Basin ◽  
Lagrangian Approach ◽  
Danube River ◽  
The Danube River ◽  
Danube River Basin
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