Identifying surface water bodies Experiences from the UK

1. Identifying surface water bodies Experiences from the UK By Peter Pollard Coordinator UK Technical Advisory Group

2. Transitional and coastal waters

3. Estuary limits defined for UWWT Directive 3 nautical mile limit from territorial baseline Identifying the categories

4. Typology

5. Type boundaries Coastal cells

6. Near-shore verses off-shore Further divisions added to delineate likely changes in status – based on the interim results of the pressures and impacts analysis

7. River Water Bodies

8. River length captured from 1:50,000 scale mapping: 127,517 km

9. River base-line network: 24,977 km

10. Minor tributaries included in water body but which, for presentational clarity, may not be shown on water body maps River water body at high ecological status River water body at good ecological status

11. 1 2 3 4 5 6 Lakes strung along rivers Breaks in river water bodies occur at junctions with lakes

12. 1 2 Base river water bodies on a contiguous river network 1 River water body at high ecological status 2 River water body at good ecological status Standing water

16. Divisions based on our existing water quality classification And information on likely differences in status based on initial results of pressures and impacts analysis for hydromorphological alterations Average river water body length = 10.5 km

17. Lake Water Bodies

18. 1 2 < 50 ha > 50 ha < 50 ha < 50 ha 1 River water body at high ecological status < 50 ha River water body at good ecological status 2 Lake

19. Identified as a lake water body because a problem has developed Identified as a lake water body because of its importance to the objectives of a Protected Area > 50 ha < 50 ha < 50 ha < 50 ha Lake water body < 50 ha Standing water not meeting the size or significance criteria for identification as a lake water body

20. Approach to small elements of surface water Do not have the necessary information to fully implement the approach before the end of 2004 Standing water less than 50 hectares • Included in river water body to avoid gaps in the status maps • Some may later be identified as separate lake water bodies

21. 2 1 3 5 4 Grouping or merging?

22. Identify a selection as waterbodies Coastal Water Up to 1 or 3 nm limit Surface water not included in a water body Coastal water body at good ecological status Coastal water body at high ecological status Land

23. Summary statistics

24. 2390 river water bodies (including 30 canal water bodies) 350 lakes 50 transitional water bodies 450 coastal water bodies (including about 100 small lagoons)

25. Changes in status – or pressures and impacts results

26. River water body at moderate ecological status Actual river length degraded to “moderate” by impact River water bodies at high ecological status Actual condition “good” until moderate stretch incorporated

27. Keep as large as can – but still highlight the problems Minimum size rule - 1 Km

28. Protected Areas

29. Shellfish Water Protected Area Bathing Water Protected Area Natura 2000 Protected Area Coastal Water Coastal water body at high ecological status Coastal water body at good ecological status Land

30. Stream with catchment area less than 10 km2 not identified as a water body Water body with catchment area less than 10 km2 identified as a drinking water Protected Area Coastal Water Up to 1 or 3 nm limit Surface water not included in a water body Transitional water body at poor ecological status Coastal water body at good ecological status River water body at poor ecological status Coastal water body at high ecological status Land