KVÄVEUTSLÄPP VID TUNNELDRIFT FÖR JÄRNVÄG I BOTKYRKA KOMMUN / Nitrogen Emission by Tunnelwork for Railway in Botkyrka Parish, Sweden
Tunnelwork for the new railway through Botkyrka parish has shown to generate a large nitrogen emission to water recipients. Tot-N concentrations over 50,000 ìg/l have been measured in water from the tunnel outlet. The maximum amount of nitrogen emitted to water recipients as NH3, NO2 and NO3 from a tunnellength of approx 4.8 km is estimated up to 43 ton. 430 ton of the explosive ammoniumnitrate is used for the tunnelwork.