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IDENTIFYING HISTORIC POLLUTION ON LAKE BACAU I, ROMANIA USING GIS AND SATELLITE IMAGES
Autori: Maria-Ema Faciu
Data aparitiei: Martie / 2016
Revista: Environmental Engineering and Management JournalVol. 15Nr. 3
ISSN: 1843 - 3707
Pret: 25.00 RON    
N.A.

The Lake Bacau I, located in Bacau City, Romania was built in 1966 with a double purpose: as reservoir belonging to the energy
system of the Bistrita River and to provide the water needed for the industrial units located in the area. Also, for more than 40
years, the lake was used by the same plants to discharge the wastewater, more or less treated. In present, most of the industrial
units are closed and the discharge of wastewater in the lake is banned, the area being used mainly for recreational activities. The
aim of the study was to test if historic pollution of the banks can be identified using heavy metals concentration in water as
indicators, and analysis of spatial distribution maps and satellite images as methods. The research hypothesis was that due to long
time exposure, heavy metals were accumulated in the banks from the areas influenced by the discharging pipes, and in present act
as pollution source for the water. These areas, where pollution sources are active, should be highlighted on the distribution maps.
Water samples from 30 locations in the vicinity of the banks were taken and concentrations of Cd and Mn were determined. The
distribution maps highlighted two zones of high concentrations, located on the right bank in the same areas as the discharging
pipes, confirming the research hypothesis. A third zone was located on the left bank and it was explained, through the analysis of
the satellite images of the lake, as a result of the pollutants’ transport. The paper shows how analysis of heavy metals’ spatial
distribution in water using GIS and satellite images can be used to identify historic pollution of the banks. Also, because the
accessibility, affordability and the broad topic make this approach suitable to educational interdisciplinary projects too, the
methods used in processing and transmitting data collection in real-time were emphasized.



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