Analisi del ruolo dei vigneti sulla stabilità di versante in un’area soggetta a frane superficiali

[Autom. eng. transl.] The first results of a multidisciplinary study carried out in the hilly area of the Oltrepò Pavese are presented, aimed at studying the triggering mechanisms of shallow landslides and in particular the role of mechanical reinforcement of soils caused by the roots of vines as well as the effects that the practices management of the vineyards have in promoting or countering the instability of slopes used for viticulture. The cultivation techniques, in particular the use of the vineyard in rittochino, influence the instability of the slopes. The distribution of vine roots in the soil is maximum in the first 0.6 m and tends to decrease with depth. Where the roots are present, they determine a mechanical reinforcement, expressed as basal root cohesion, on the ground, up to 18.3 kPa in stable slopes. The study has important repercussions on territorial planning policies and can positively affect the presence of the territory and the prevention of instability phenomena.