Risques de gel accru liés à la présence d’ouvrages linéaires en remblai

EchoGéo

关键词: arboriculture;    micro-weather embankment;    climate risk;    vine growing;    GIS;   

DOI  :  10.4000/echogeo.1052

来源: DOAJ

【 摘 要 】

By radiativ weather (weak wind and clear sky), an embankment located in below slope level generates an obstacle with the natural flow of the cold air and it develops the formation of cold air lake. In spring, this obstacle can increase the frost risk for the vulnerable cultures (vine, fruit trees...). Weather measurements on fine scales and embankment simulation (with a plastic cover or in a GIS) permit to evaluate the temperature difference after the embankment implantation. The examples presented here are the impact of the embankments of high speed lines of the East European TGV (in the Champagne vineyard) and of the Mediterranean TGV (in orchards of Durance Valley). The results show a temperature difference of several degrees and also a longer stagnation of cold air surface upstream of the embankment, which can cause the buds destruction. With the importance of the foreseeable problems, the building owner proposed installations in order to reduce this additional risk.

【 授权许可】

Unknown