Research of Surface Waters Quality in Hilly Areas with Model “WaQ”

Water quality modelling with “WaQ” wants to improve current systems for monitoring, the model allows establishing the source of pollutants and limits for discharges that lead to poor quality water, as well as the basic or additional measures necessary to achieve environmental objectives under Framework Directive 2000/60. Analysing the data output of the model “WaQ” for the Bahlui catchment it has been found that impairment of good water, especially regarding nutrients as required by the directive is given by agricultural work practices, this fact indicating agriculture as one of the main sources of diffuse pollution of surface water, including barrier lakes. As a result of modelling with “WaQ” for Bahlui catchment, the forecast made in the perspective of 2021, was found an increase in total nitrogen and total phosphorus imissions compared to 2012, fact caused by increasing agricultural areas. On the other hand, only for the sub-basin Razboieni-upstream Podu Iloaiei was determined a decrease in load with total nitrogen and total phosphorus in 2021, which resulted an improvement of the ecological potential for the barrier lake Podu Iloaiei.