Searching for a compromise between ecological quality targets, and social and ecosystem costs for heavily modified water bodies (HMWBs): the Lambro-Seveso-Olona system case study
Abstract:The Lambro-Seveso-Olona (L-S-O) system derives from the human regulation of the natural hydrology of the territory around Milan city area. The average population density in the L-S-O area is among the highest in Italy and Europe. Industry is also highly developed in this basin: chemical, textile, paper, pulp and food industries being the most important ones. Although, at present, the L-S-O system no longer receives the untreated wastewaters of the Milan urban area, treated wastewaters constitute about half of … Show more
“…2 a). AMPA is accumulated in the North West area of Lombardy, which corresponds to the territory of the Varese province, where we find Olona, Seveso, Bozzente and Lura, four known polluted rivers 17 , 18 . Figure 2 Glyphosate and AMPA in surface waters.…”
Quantifying synergistic environmental effects in water contamination is still an open issue. Here, we have analyzed geolocalized data of pollutants recorded in 2018 in surface and groundwater of Lombardy, one of the areas with the highest agricultural production rates, not only in Italy, but also in Europe. Both herbicides and insecticides are present at concentration levels above the legal limit, mainly in surface waters. Geolocalized analysis allows us to identify interesting areas particularly affected by a combination of multiple pesticides. We thus investigated possible synergistic effects of these compounds on the environment, using the alga C. reinhardtii as a biosensor. Our results show that exposure for 7 days to four compounds, that we found present together at high concentration in surface waters, was able to induce a stress in the algae, as indicated by the presence of palmelloids. Our work results in a pipeline that could easily be exported to monitor other territories in Italy and abroad.
“…2 a). AMPA is accumulated in the North West area of Lombardy, which corresponds to the territory of the Varese province, where we find Olona, Seveso, Bozzente and Lura, four known polluted rivers 17 , 18 . Figure 2 Glyphosate and AMPA in surface waters.…”
Quantifying synergistic environmental effects in water contamination is still an open issue. Here, we have analyzed geolocalized data of pollutants recorded in 2018 in surface and groundwater of Lombardy, one of the areas with the highest agricultural production rates, not only in Italy, but also in Europe. Both herbicides and insecticides are present at concentration levels above the legal limit, mainly in surface waters. Geolocalized analysis allows us to identify interesting areas particularly affected by a combination of multiple pesticides. We thus investigated possible synergistic effects of these compounds on the environment, using the alga C. reinhardtii as a biosensor. Our results show that exposure for 7 days to four compounds, that we found present together at high concentration in surface waters, was able to induce a stress in the algae, as indicated by the presence of palmelloids. Our work results in a pipeline that could easily be exported to monitor other territories in Italy and abroad.
“…2a). AMPA is accumulated in the North West area of Lombardy, which corresponds to the territory of the Varese Province, where there are Olona, Seveso, Bozzente and Lura , four known polluted rivers [18,19].…”
Quantifying synergistic environmental effects in water contamination is still an open issue. Here, we have analyzed geolocalized data of pollutants recorded in 2018 in surface and groundwater of Lombardia, one of the areas with the highest agricultural production rates, not only in Italy, but also in Europe. Both herbicides and insecticides are present at concentration levels above the legal limit, mainly in surface waters. Geolocalizated analysis allows us to identify interesting areas particularly affected by a combination of multiple pesticides. We thus investigated possible synergistic effects of these compounds on the environment, using the alga C. reinhardtii as a biosensor. Our results show that exposure for 7 days to four compounds, that we found present together at high concentration in surface waters, was able to induce a stress in the algae, as indicated by the presence of palmelloids. Our work results in a pipeline that could easily be exported to monitor other territories in Italy and abroad.
“…0.5 mg/l). GEP3 chemical thresholds were identified by means of a quantile regression approach as described in Azzellino et al 2012.…”
Section: Effectiveness Evaluationmentioning
confidence: 99%
“…Two indicators were extracted from the IFF index, the italian index concerning the evaluation of the river morphological and vegetation aspects (Siligardi et al, 2007). Specific threshold values were identified by means of a quantile regression approach and were assumed for the good quality status of morphology and vegetation (see Azzellino et al 2012 for details about the analysis). Finally the effectiveness for removing organic micropollutants was evaluated and attributed to every reach unit depending on the WWTP treatment scheme (see Table 2).…”
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