WFD and Inland Navigation

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Presentation transcript:

WFD and Inland Navigation Impact on Ecological Quality? Frederik J. MINK

Navigation and water bodies Type: Marine Transitional Inland Water Body: Coastal Estuaries Ports Rivers and lakes Canals Classification: NWB HMWB AWB Type of Navigation: Maritime transport Inland Waterborne

Water bodies Specified uses (HMWB) Quality elements Navigation (transport) Flood protection Hydrodams Cooling water Water supply Fisheries Recreation Urbanisation Quality elements Biological Hydromorphological Physico-chemical Ecological PRESSURES

Factors defining Quality Environmental quality WFD Art. 8.1 Ecological status Chemical status Hydromorphology Biological factors Guidance doc Physical aspects Chemical aspects

Impact Model Physico-chemical factors Economy Biological quality Urbanisation Industry discharge Cooling water Cooling water Transport Fisheries Hydropower Physico-chemical factors Economy Biological quality Ecologicalstatus WFD Environment Sustainability Hydro-morphology status Societal Water supply Flood protection Urbanisation Recreation Hydropower Transport Flood protection

Inland navigation Hydromorphology Ecological quality Current velocity Erosion Sediment deposition Bed structure Riparian zone Biodiversity Possible mitigation Dams H L M Sediment bypasses fish traps Locks River bypass Straightening M/H L/H Maintain rivers arms as quiet zones Widening N.S. Compensate with e.g. bird islands Deepening Restore bed structure Embankments Compensate with “green shores” Maintenance dredging (Restoration process) Impact Pressure H=High M=Medium L=Low N.S.=Not Significant

Inland navigation pressures Impact Possible Response Accidents dangerous substances Double hull tankers Leaks/ Bilge water Env. Management Codes/ Oil-water sep. Waste Waste Reception Facilities Waves Bank protection Antifouling leaching TBT phase out – Cu concern Ballast water / alien species IMO Convention Turbidity /suspended matter Limited consequences Contaminant release Temporary – no long term impact water chemistry D.M. Placement May have positive impact on hydromorphology Benthic fauna Complete restoration in 6-24 mo.

Conclusion Inland Navigation Navigation impact One of many specified uses Designation as HMWB possible Navigation impact Mainly hydromorphology Many Impacts on ecology can be mitigated Direct effect on chemical water quality small Other sources dominant (agri, urban,industry)