Türkiye'de kent içi raylı sistem projelerinde malzeme miktarları üzerinden yapılan gömülü karbon değerlendirmeleri

The aim of this study is to create a reference study for carbon footprint assessments of infrastructure systems in Turkey. Accordingly, the embodied carbon of urban railway systems (metro lines) were calculated based on material quantifications. Specifically, four urban railway lines, including 18 metro stations in Istanbul, Turkey were examined. With these assessments, a reference carbon footprint value of the urban railway systems was provided. The findings indicate that the total carbon footprint (CFP) of the subterranean railway metro stations ranged between 36,734.47 tCO2-eq and 89,551.80 tCO2-eq with the average of 58,557.58 tCO2-eq. The CFP per m2 of the stations ranged between 2,39 tCO2-eq/m2 and 11,04 tCO2-eq/m2 with the average of 6,8 tCO2-eq/m2. At the line level, the total CFP of all the lines ranged between 336,897.58 tCO2-eq and 1,630,278.09 tCO2-eq with the average of 705,261 tCO2-eq. The CFP per construction length (km) of the lines ranged between 52,152 tCO2-eq/km and 88,634 tCO2-eq/km with the average of 75,991 tCO2-eq/km.