Climatic changes in Arad area, Romania, made possible for droughty periods to appear in areas where the sums of annual or seasonal precipitations is closer to multiannual means, that is, the water which came with a high intensity (mm/min) rainfall was prevented from being collected in the soil. This shows that the main hydro-climate risks are the hydric deficits and some humidity excess periods. This study is focused at presenting the hydric deficits ( i.e. the existence of large droughty periods an d some hydric excess) in the Arad area in a time span of over two years (2015-2016). These years have been analyzed from the multiple points of view of several hydro climatic indicators from the specialized literature. The following parameters for monitoring hydro climate deficits in the Arad area have been used: sum of annual and monthly precipitations, monthly and annual hydric deficit and their own graphic representation, average monthly temperatures, monthly and annual mean evapotranspiration, mean monthly temperature and their evolution. Climate and hydro-thermal indexes of drought (Hellman, Topor, Lang and the hydro-thermal indicator Seleaninov) have also been calculated and analyzed. Moreover, the Thornthwaite index of precipitation efficiency has been characterized according to the precipitation deficit. When taking into consideration the rainfall regime, which is an important indicator of acknowledging drought and humidity excess, this of course depending only on the sum of monthly precipitations in the summer as well as in the spring (annual sum of the precipitations), a conclusion can be drawn is that during the lenghty period studied (2015-2016) the second year, 2016, was humid and rainy. Regarding the precipitation deficit, when compared to monthly, seasonal, annual and multiannual figures, it can be said that June, August and September were mainly droughty periods in both analyzed years. The year 2015 was a semi-arid one according to most indicators analyzed, having significant hydric deficits during most of the hot season as well as higher monthly and annual temperatures than multi-annual ones. Finally, results regarding the year 2015 show that there have been periods with hydric deficits, even droughty months from April till August, being defined as a semi-arid year in most indicators analyzed.

potential evapotranspiration, , annual hydric deficits, precipitation deficit, hydro-thermal indicators

environmental engineering

Presentation: poster