Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Road de-icing salt and its effects on surface water: a case study in Northern Italy, subalpine Lake District |
| Abstract | In the recent period there has been a growing concern about the effects of increasing chloride concentration in surface waters, due to their potential damage to aquatic life. Increasing content of chloride has been observed in several lakes and rivers in urban areas or close to major roads in Europe and US. In Italy the use of NaCl as road de-icing agent is limited to northern regions and mountain areas. However, possible effects of chloride on water quality have never been assessed. Long term series of chemical data exists, including major ions, for the lakes of the subalpine district (Maggiore, Lugano, Como, Iseo e Garda). In this paper we analyse trends affecting Cl and Na concentrations in the deep subalpine lakes during the last 25 years, with the aim to discuss the possible causes of temporal changes. An in-depth analysis is presented for Lake Maggiore. All the lakes considered show positive trends of Na and Cl concentrations, mostly evident in the recent part of the record (since 2000). For Lake Maggiore, the increasing content of these ions in lake water is in agreement with the raising loads from the main tributaries. The use of NaCl as road de-icing agent in winter was identified as the main cause for the observed trends. Cl concentrations in the study lakes are still far from the threshold limit for water quality; however, the positive trends of Cl in these lakes, representing almost 80% of the total freshwater volume in Italy, warrants further investigation. |
| Source | WLC 15 - World Lake Conference "Lakes: the mirrors of the Earth. Balancing ecosystem integrity and human wellbeing", Perugia, 1-5 settembre 2014 |
| Keywords | ChemistrySubalpine districtDe-icing |
| Year | 2014 |
| Type | Contributo in atti di convegno |
| Authors | Michela Rogora; Rosario Mosello; Nico Salmaso; Leonardo Cerasino |
| Text | 328994 2014 Chemistry Subalpine district De icing Road de icing salt and its effects on surface water a case study in Northern Italy, subalpine Lake District Michela Rogora; Rosario Mosello; Nico Salmaso; Leonardo Cerasino CNR ISE, IASMA Research and Innovation Centre Fondazione E.Mach S.Michele all Adige In the recent period there has been a growing concern about the effects of increasing chloride concentration in surface waters, due to their potential damage to aquatic life. Increasing content of chloride has been observed in several lakes and rivers in urban areas or close to major roads in Europe and US. In Italy the use of NaCl as road de icing agent is limited to northern regions and mountain areas. However, possible effects of chloride on water quality have never been assessed. Long term series of chemical data exists, including major ions, for the lakes of the subalpine district Maggiore, Lugano, Como, Iseo e Garda . In this paper we analyse trends affecting Cl and Na concentrations in the deep subalpine lakes during the last 25 years, with the aim to discuss the possible causes of temporal changes. An in depth analysis is presented for Lake Maggiore. All the lakes considered show positive trends of Na and Cl concentrations, mostly evident in the recent part of the record since 2000 . For Lake Maggiore, the increasing content of these ions in lake water is in agreement with the raising loads from the main tributaries. The use of NaCl as road de icing agent in winter was identified as the main cause for the observed trends. Cl concentrations in the study lakes are still far from the threshold limit for water quality; however, the positive trends of Cl in these lakes, representing almost 80% of the total freshwater volume in Italy, warrants further investigation. Chiara Biscarini, Arnaldo Pierleoni, Luigi Naselli Flores 978 88 96504 04 8 Published version WLC 15 World Lake Conference Lakes the mirrors of the Earth. Balancing ecosystem integrity and human wellbeing Perugia 1 5 settembre 2014 Nazionale Contributo Proceedings 2014_Proceedings_ILEC_Rogora_28_31.pdf Contributo in atti di convegno rosario.mosello MOSELLO ROSARIO michela.rogora ROGORA MICHELA TA.P02.014.002 Impatto dei cambiamenti globali sugli ecosistemi acquatici |