Modeling of Chemical Species and Precipitation Processes in Waters of the Protected Site Poda, Burgas, Bulgaria

Sampling of five water bodies in Protected Site PODA, and of two water bodies in the greater Special Protection Area MANDRA-PODA, Burgas, Bulgaria, both designated for the protection of bird species, was performed during the high-flow period of February 2014 and the low-flow period of June 2015. A new approach for ecological assessment of these waters was applied using the obtained data on physico-chemical and chemical characteristics of the waters and subsequent thermodynamic modeling. The inorganic and organic chemical species of major ions (Na+, K+, Ca2+ and Mg2+) and trace elements Al, Fe, Mn, Co, Ni, Cu, Zn, Cd, Pb in the water samples were calculated and discussed.