The presence of ice on the roads has always been a major problem during the winter months. A system capable of predicting its formation is one of the best strategies to operate towards reducing both road accidents and the waste of chemical solvents used for prevention, which have an important economic and environmental impact. To this end, the Epson Meteo Center (CEM) has developed an algorithm based on the Land Surface Temperature (LST) forecast which, combined with the expected air humidity value, outputs the ice alert code. The algorithm is tested on the paved areas of the Pedemontana Lombarda highway and of the Linate airport. LST is a key parameter in understanding the phenomena of energy exchange at the interface between the earth's surface and the atmosphere, so its knowledge can also be useful for other purposes such as the irrigation system management. For this reason, further experiments on the algorithm have been carried out at the Chiese river basin and in the area of the Capitanata of Foggia, where the Politecnico of Milan has been undertaking soil monitoring surveys for many years (SIM Project, Smart Irrigation Management). The study of the algorithm showed encouranging results with high values of the coefficients of Nash-Sutclifee and R2 when it is applied on the asphalted areas and after an appropriate coefficients tuning, even if it is applied to others surfaces.
La presenza di ghiaccio sulle strade rappresenta da sempre un problema di grande rilievo durante i mesi invernali. Un sistema in grado di prevederne la formazione si rivela una delle migliori strategie per operare a favore della riduzione sia degli incidenti stradali sia dello spreco di solventi chimici di prevenzione, i quali hanno un importante impatto economico e ambientale. A questo scopo il Centro Epson Meteo (CEM) ha elaborato un algoritmo basato sulla previsione della Land Surface Temperature (LST) che combinata con il valore previsto di umidità dell’aria fornisce in uscita il codice di allerta ghiaccio. L’algoritmo è stato sperimentato sulle aree asfaltate dell’autostrada Pedemontana Lombarda e dell’aeroporto di Linate. La LST è un parametro chiave nella comprensione dei fenomeni di scambio energetico all’interfaccia tra la superficie terrestre e l’atmosfera e la sua conoscenza può essere utile anche ad altri scopi come la gestione dei sistemi di irrigazione. Per questo motivo sono state fatte ulteriori sperimentazioni dell’algoritmo presso il Bacino del Chiese e l’area della Capitanata di Foggia, dove il Politecnico di Milano compie da anni indagini di monitoraggio del suolo (Progetto SIM, Smart Irrigation Management). Lo studio dell’algoritmo mostra risultati incoraggianti con elevati valori degli indici di Nash-Sutcliffe ed R2 quando applicato sulle aree asfaltate e dopo un’opportuna calibrazione dei coefficienti, anche se applicato a superfici diverse.
Studio di un algoritmo di previsione per il rischio ghiaccio stradale
DEL VECCHIO, MARIA CHIARA
2018/2019
Abstract
The presence of ice on the roads has always been a major problem during the winter months. A system capable of predicting its formation is one of the best strategies to operate towards reducing both road accidents and the waste of chemical solvents used for prevention, which have an important economic and environmental impact. To this end, the Epson Meteo Center (CEM) has developed an algorithm based on the Land Surface Temperature (LST) forecast which, combined with the expected air humidity value, outputs the ice alert code. The algorithm is tested on the paved areas of the Pedemontana Lombarda highway and of the Linate airport. LST is a key parameter in understanding the phenomena of energy exchange at the interface between the earth's surface and the atmosphere, so its knowledge can also be useful for other purposes such as the irrigation system management. For this reason, further experiments on the algorithm have been carried out at the Chiese river basin and in the area of the Capitanata of Foggia, where the Politecnico of Milan has been undertaking soil monitoring surveys for many years (SIM Project, Smart Irrigation Management). The study of the algorithm showed encouranging results with high values of the coefficients of Nash-Sutclifee and R2 when it is applied on the asphalted areas and after an appropriate coefficients tuning, even if it is applied to others surfaces.File | Dimensione | Formato | |
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https://hdl.handle.net/10589/148633