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<idAbs>La combinaison des classes d'intensité avec les classes de probabilité permettent de décrire les degrés de danger érosion (indexés de 1 à 9).&lt;br /&gt;&lt;br /&gt;Pour les érosions, les critères adoptés dépendent de la profondeur moyenne de la brèche (D), mesurée perpendiculairement depuis la surface du talus :&lt;br /&gt;&lt;br /&gt;- intensité forte : D &amp;gt; 2 mètres&lt;br /&gt;- intensité moyenne : 2m &amp;gt; D &amp;gt; 0.5 m&lt;br /&gt;- intensité faible : D&amp;lt; 0.5 m&lt;br /&gt;&lt;br /&gt;La probabilité d'apparition d'un dommage se définit au moyen de classes. Les limites de classes sont définies de la manière suivante :&lt;br /&gt;&lt;br /&gt;- probabilité élevée : T &amp;lt; 30 ans&lt;br /&gt;- probabilité moyenne : 30 ans &amp;lt; T &amp;lt; 100 ans&lt;br /&gt;- probabilité faible : 100 ans &amp;lt; T &amp;lt; 300 ans</idAbs>
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<idPurp>Inventaire des érosions dues aux cours d'eau</idPurp>
<idCredit>© 2026 SITG</idCredit>
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