The European Water Framework Directive has set the Water Quality Objectives (WQOs) and each member state must accomplish the WQOs within 2027. In order to achieve these objectives is important to identify the major sources of pollution at catchment scale. Having in mind the targets of WFD the assessment of the nutrient fluxes discharged to the Po river by different type of emission sources (diffuse and point) is the first step for identifying the Drive- Pressure relationship causing the eutrophication and the deterioration of the WQ of the North Adriatic CZ. The main emission sources of nutrients are point sources (i.e., industry and waste water treatment plants) and diffuse sources (i.e., agriculture, surface runoff). The nutrient fluxes discharged to the Po river were estimated by using the MONERIS (MOdelling Nutrient Emissions in RIver Systems) model. MONERIS uses a number of input datasets including information of the study area i.e., river flows, water quality parameters, statistical data of nutrient discharged into the catchment, and major driving forces i.e., industry and waste water treatment plant's. The modeling of processes affecting the transport of pollutants to the catchment and CZ accounts for major pathways of pollutant transport from the emission sources to the receptor area which includes atmospheric deposition, erosion, surface runoff, groundwater, tile drainage, waste water treatment plants (WWTP) and runoff for paved urban areas. The correctness in nutrient fluxes estimation was reached by a wise calibration phase used to adapt the model to our catchment. Moreover a preliminary sensitivity analysis was made before the application of the model to identify some key parameters helpful in the calibration phase. The catchment was analyzed by a 24 sub-basin division (ABPO 1997) considering both physic data and transformed socio-economic data that were originally set at municipality level. The evaluation of spatial and temporal distributions of nutrient fluxes and pathways highlights the changes of the water quality in the different periods. The estimate of nutrient emission for both periods 1990-1995 and 1995-2000 agree with those obtained from measured data at the sampling stations. The groundwater is the main pathway that contribute to Nitrogen emission (>50%) while the WWTP pathway has a great impact on Phosphorus emission (>35%). Finally the model was used to assess scenario analysis for the estimation of nutrient emissions having in mind the WQOs of WFD.
Estimate of Nutrient Emissions from the Po Catchment into the Northern Adriatic Sea
Cinnirella S;Pirrone N
2003
Abstract
The European Water Framework Directive has set the Water Quality Objectives (WQOs) and each member state must accomplish the WQOs within 2027. In order to achieve these objectives is important to identify the major sources of pollution at catchment scale. Having in mind the targets of WFD the assessment of the nutrient fluxes discharged to the Po river by different type of emission sources (diffuse and point) is the first step for identifying the Drive- Pressure relationship causing the eutrophication and the deterioration of the WQ of the North Adriatic CZ. The main emission sources of nutrients are point sources (i.e., industry and waste water treatment plants) and diffuse sources (i.e., agriculture, surface runoff). The nutrient fluxes discharged to the Po river were estimated by using the MONERIS (MOdelling Nutrient Emissions in RIver Systems) model. MONERIS uses a number of input datasets including information of the study area i.e., river flows, water quality parameters, statistical data of nutrient discharged into the catchment, and major driving forces i.e., industry and waste water treatment plant's. The modeling of processes affecting the transport of pollutants to the catchment and CZ accounts for major pathways of pollutant transport from the emission sources to the receptor area which includes atmospheric deposition, erosion, surface runoff, groundwater, tile drainage, waste water treatment plants (WWTP) and runoff for paved urban areas. The correctness in nutrient fluxes estimation was reached by a wise calibration phase used to adapt the model to our catchment. Moreover a preliminary sensitivity analysis was made before the application of the model to identify some key parameters helpful in the calibration phase. The catchment was analyzed by a 24 sub-basin division (ABPO 1997) considering both physic data and transformed socio-economic data that were originally set at municipality level. The evaluation of spatial and temporal distributions of nutrient fluxes and pathways highlights the changes of the water quality in the different periods. The estimate of nutrient emission for both periods 1990-1995 and 1995-2000 agree with those obtained from measured data at the sampling stations. The groundwater is the main pathway that contribute to Nitrogen emission (>50%) while the WWTP pathway has a great impact on Phosphorus emission (>35%). Finally the model was used to assess scenario analysis for the estimation of nutrient emissions having in mind the WQOs of WFD.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
