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Rodica Macalet, National Institute of Hydrology and Water Management (Romania)
Dumitru Dragusin, National Institute of Hydrology and Water Management (Romania)
Mihai Radescu, National Institute of Hydrology and Water Management (Romania)
Ion Stanescu, National Institute of Marine Geology and Geo-ecology (Romania)
Camelia Cazacu, National Institute of Marine Geology and Geo-ecology (Romania)
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The S and SW parts of Romania belong, from a geomorphologic point of view, to the Romanian Plain. The shallow aquifers from this region developed mostly in Upper Pleistocene and Holocene deposits, along the main rivers (Drincea, Desnatui, Jiu, Olt, Calmatui, Vedea, Teleorman, Arges), and also along the Danube river and its tributaries.
The shallow groundwater from the Oltenia Plain and the Danube terraces lies in porous-permeable rocks at variable depths, more widespread in the N of the Romanian Plain and limited in the S. All along the Olt and Jiu rivers, the piezometric level depth also varies, to reach a depth of 30 m within the interfluves. The potential of these shallow formations is medium, reaching values of about 11 l/s/point of extraction.
Alongside the Danube Flood Plain and its terraces, the shallow aquifer is made of sands and gravels; the alluvial formations are up to 20 m thick. The high permeability of the Romanian Plain deposits allows an active circulation of shallow waters. The flow directions are towards river beds but also vice versa, due to the relationship between the aquifer and the rivers.
The analysis of the quantitative status was performed by evaluating the piezometric levels measured in wells which belong to the National Hydrogeological Network. Our analysis indicates two predominant regimes. The quality status of shallow groundwaters was assessed by comparing anion and cation values resulted from hydrochemical analyses with threshold values in keeping with present Romanian regulations.
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