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The Development of the Dredging Spatial Information System (DSIS)

Dredging Spatial Information System (DSIS)

The Dredging Spatial Information System (DSIS) is an easy-to-use and informative tool maintained by the Port of London Authority. The purpose of DSIS is to help members of the Dredge Liaison Group perform their advisory role when responding to dredge license consultations. DSIS gives members of the Dredge Liaison Group access to spatial information relating to dredge activity within the tidal Thames.

DSIS was developed as part of a number of initiatives in the PLA’s Maintenance Dredging Framework. DSIS provides a visual representation of the information and provides access to more detailed datasets as required.

DSIS enables the PLA and members of the DLG to access and interrogate environmental data relevant to dredging activity. The database supporting the application contains large datasets that have been supplied by members of the DLG, including:

  • Historic and current records of dredging activity within the tidal Thames
  • Water and sediment quality data with contaminant levels sorted by year
  • Designated conservation sites: SPA, SAC, RAMSAR, SSSI, NNR
  • Fisheries information including sensitivities and fish activity throughout the year
  • Ecology data (e.g. locations of intertidal habitat, salt marshes etc)

The PLA’s Environment team uses DSIS, together with information about the proposed dredge, to inform decision-making and to identify any conditions that should be included in a dredging licence.

Access to the DSIS for members of the Dredging Liaison Group can be found via this link.