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Droughts are a natural phenomenon with a fairly high frequency worldwide. Their evolution generates, through the water deficit, a state of vulnerability at the level of natural and social components. In areas dependent on groundwater resources this vulnerability is transformed in a high social and economic risk. In this situation can be included the eastern part of Romania where over 50% of the population, predominantly in rural areas, is supplied with groundwater. In order to highlight the negative effects of a n...

The variation in time and space of the groundwater level is conditioned by the variation of climatic parameters. In the current context in which climate change is characterized by periods of prolonged drought and the distribution of precipitation is of the rainfall type, with large amounts of precipitation in a very short time, the groundwater level has accentuated periods of consumption to the detriment of accumulation episodes. In a first phase, the high values of the temperature superimposed over the periods wi...

In order to properly manage water resources in a river basin, it is necessary to identify trends in the evolution of rivers flow. Long-term trends analysis for river flow in north eastern part of Romania is based on two different methods: non-parametric rank-based Mann?Kendall (MK) test and innovative trend analysis (ITA). These two methods were applied for 7 hydrometric stations located in river basins unaffected by hydro-technical works, with hydrological observations on the average flow for the period 1950-2017...

To evaluate hydrological drought in small basin was used minimum flow parameters like percentiles from the flow duration curve, mean annual minimum flow, base flow index and recession index. Water deficit was estimated based on threshold level method and the sequent peak algorithm. Each method was exemplified using data from hydrometric stations from small basins included in Bahlui drainage basin. The results show that in the period between 1950 and 2014, the average drought duration of the cold season is over 20 ...

In recent decades the increase of the frequency of flash-flood conditions requires a correct identification of potential flood areas where these hydrological risk phenomena appear in Moldavian Plain. To identify the basins and localities exposed to flash-flood was used physiographic method. This method allows the opportunity to identify the river basins with the concentration of water from precipitations in less than 6 hours. Through successive sorting of the basins which may generate the flash-flood was identifie...