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On retrouve donc les cours d'eau non navigables de 1ère, 2ème et 3ème catégorie. La couche de données reprend également les voies hydrauliques navigables gérées par la Direction de l'Exploitation des Voies navigables (SPW - Mobilité et Infrastructures - Département de l'Exploitation des infrastructures - Direction de l'Exploitation des Voies navigables), les cours d'eau non navigables non classés (gérés par les riverains ou propriétaires) et les écoulements non visibles en surface. Attention, tous les axes du réseau hydrographique, même navigables, ont été réalisés suivant la même méthodologie. Dès lors, la géométrie des voies hydrauliques navigables de la présente couche n'est pas identique à celle gérée par la DGVN.\n\nCette dernière constitue la référence en la matière et est décrite dans la fiche https://geoportail.wallonie.be/catalogue/ba4f3c8a-aa20-4bb4-9bf4-28d05e525157.html. 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