MONITORING OF PRIMARY HYDRO-CLIMATIC INDICES IN THE TIMISOARA AREA PUBLISHEDMihaela MARTENIUC, Andreea POPESCU Anisoara Aurelia, IENCIU
Abstract. The most important hydro-climate risks in the Timisoara area, Romania, are hydric deficits and humidity excess periods. There have been, because of climate change, droughty periods in areas where the sum of annual or season precipitations is close to multiannual means: the problem is that the water came from high intensity (mm/min) precipitations, which prevented water from accumulating in the soil. The study aimed at presenting the hydric deficits (the existence of droughty periods and of hydric excess) in the Timisoara area over two years (2013-2014). The years have been analysed from the perspective of several hydroclimatic indicators in literature. The following parameters of monitoring hydro-climate risks in the Timisoara area have been studied: average monthly temperatures, sum of monthly and annual precipitations, mean monthly and annual evapotranspiration, monthly and annual hydric deficits and their graphic representation, mean monthly temperatures and their evolution; we have calculated and analysed climate and hydro-thermal indicators of drought (Hellman, Topor, Lang), we have characterised depending on the precipitation deficit, the Thornthwaite indicator of precipitation efficiency. From the point of view of the rainfall regime, an important indicator in acknowledging drought and humidity excess depending on the sum of monthly precipitations in summer and even in spring (annual sum of precipitations), we can draw the conclusion that, during the period studied (2013-2014), the year 2014 was humid, rainy. Depending on the precipitation deficit, compared to monthly, seasonal and annual multiannual means, we can say that June, August and September were droughty periods and months in the analysed years. The year 2013 was demi-arid according to most indicators analysed, with monthly and annual mean temperatures higher than multi-annual ones, with significant hydric deficits during the hot season. Results show that there were periods with hydric deficits, droughty periods in the year (2013) (April-August), this year was also defined as demi-arid in most indicators analysed and the year 2014 was humid and rainy.
potential evapotranspiration, climate coefficient, annual hydric deficits, precipitation deficit