Session: 14, Room:
The holistic approach of the Driver-Pressure-State-Impact-Response (DPSIR) analytical framework in combination with Geographical Information Systems was applied to selected Cr(VI) impacted groundwater bodies. For the characterization of water-quality “state” 157 samples including field blanks were collected during the wet and dry seasons of 2017 and 2018 and several physicochemical parameters were determined. In Loutraki area, Cr(VI) in groundwater ranged from 12 to 62 μg/L while NO3 and Cl maximum values were 157mg/L and 218mg/L respectively. Very high concentrations of Cr(VI) (up to 430μg/L), NO3 (up to 245mg/L) and Cl (up to 1039mg/L) were measured in the Schinos alluvial aquifer. Additionally, Cr(VI) up to 131μg/L and NO3 up to 156mg/L were identified in the groundwater ofThiva agricultural area. In C. Evia, Cr(VI) was up to 96μg/L while NO3 and Cl concentrations were also high reaching 362mg/L and 793mg/L respectively. Finally, the highest Cr(VI) concentrations (up to 11.7 mg/L) were measured in Oinofyta area. The main identified pressures are: i) NO3 pollution due to intensive agriculture and urban waste disposal, ii) sea water intrusion due to overpumping and iii) Cr(VI) contamination due to both natural processes and industrial activities (clearly in the case of Oinofyta). In many cases, Cr(VI), NO3 and Cl are above the upper drinking water threshold values of the European Directive 98/83/EC.
Thu, 09/05/2019 - 15:45 to 16:00
Oral presentation in Efficient water resources management in Cr(VI) impacted water bodies