Architecture des systèmes racinaires implantés dans des digues en terre.

[Departement_IRSTEA]Eaux [TR1_IRSTEA]RIVAGE [TR2_IRSTEA]SEDYVINInternational audienceTrees growing on earth dikes generate safety problems and reduce dike durability. Root systems generate internal and external erosion risks which can be important on dikes wooded for a long time. Erosion risks increase with tree age and stand density. The aim of this study is to analyse root systems characteristics of trees rooted in canal dikes and flood protection dikes. Root systems structure and morphology depend on species and materials. On various species studied, different types of roots can be observed. Short and long roots are characterized by differences in diameter decrease, branching frequency and inclination. A root typology is determined