| Summary: | Using open-source satellite imagery like Landsat TM, ETM+ and Sentinel 2 can lead to accurate cartographic products. We mapped flood events from Siret and Prut river basins in the last 30 years based on the availability of Landsat data archive. In this area were recorded historical values in flow rates for the entire Romanian territory: 4650 m³/s on the Siret River in 2005 – the maximum value ever recorded for Romania; 4240 m³/s on the Prut in 2008 – second maximum value recorded for Romania. The most powerful floods that took place in Romania in the last years were in 1970, 1975, 1991, 2005, 2008, 2010 and 2011. In this study four years are distinguished by particularly characteristics: 1991, 2005, 2008 and 2010. Developing geo-hydrological hazard maps and adequate analysis at an appropriate scale and as quickly as possible is extremely important from an economic and social point of view.
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