1. Institute for Environment and Sustainability1 Sea outlet coding Knowing to where the water flows to with 4 digits. …a Structured basis to code hydrological features

2. Institute for Environment and Sustainability2 Sea outlet coding Purpose of coding Level of detail Hydrographic systems Watershed coding inspired on Pfafstetter CCM2 implementation Transfer rules for non CCM2 features Examples

3. Institute for Environment and Sustainability3 Purpose of coding The purpose of hydrological coding is to understand through the coding the relations between rainfall and surface runoff in a landscape dominated by a surplus rainfall To exchange geographic features an unique and shared identifier is needed for every feature A coding system, in order to be successful must be short and comprehensive, anybody must be able to determine the code for his part of the world

4. Institute for Environment and Sustainability4 Hydrological systems definition

5. Institute for Environment and Sustainability5 Seas

6. Institute for Environment and Sustainability6 Commencement

7. Institute for Environment and Sustainability7 Level of Detail Primary catchments of ±10 km 2

8. Institute for Environment and Sustainability8 Transfer to WFD

9. Institute for Environment and Sustainability9 Ordering and aggregation

10. Institute for Environment and Sustainability10 Ordering the Seaoutlets

11. Institute for Environment and Sustainability11 Sea Aggregation

12. Institute for Environment and Sustainability12 Island coding Procedure proposal –Find closest continental coastline –Determine length along coastline to this point –Order along the coast line Example –Ibiza –Mallorca –Menorca –Corsica –Sardinia –Implementation for example a hexadecimal nr AA FF etc.

13. Institute for Environment and Sustainability13 Island coding example

14. Institute for Environment and Sustainability14 http://wise2.jrc.it Full code: Hydrological System Letter {A..Z} Sea Nr {1..9} Island sequence {A0..F9} Commencement Code {1..99999} Riversegment Pfaffstetter code {1..9999999999} Rhine outlet: A500000081 Rhine source: A500000089 Long river on Ibiza: A701000029 Longest Riversegment code is 1985982445 in Dnepr