the region has a basin management plan piano di bacino but it is not effectively integrated with other planning instruments this is particularly urgent given the lagoon s highly polluted sediment which is at times sufficiently polluted to be designated as toxic waste under national legislation and thus subject to special removal and disposal procedures the lagoon sediment is nonetheless an important resource for morphological reconstruction eg salt marshes and littoral regeneration eg creation of parks along the coastal zone however no integrated policy governs water quality concerns stemming from dredging for navigation purposes which stirs up sediment and reintroduces it into the water column