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

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Presentation transcript:

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

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

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

Institute for Environment and Sustainability4 Hydrological systems definition

Institute for Environment and Sustainability5 Seas

Institute for Environment and Sustainability6 Commencement

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

Institute for Environment and Sustainability8 Transfer to WFD

Institute for Environment and Sustainability9 Ordering and aggregation

Institute for Environment and Sustainability10 Ordering the Seaoutlets

Institute for Environment and Sustainability11 Sea Aggregation

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.

Institute for Environment and Sustainability13 Island coding example

Institute for Environment and Sustainability14 Full code: Hydrological System Letter {A..Z} Sea Nr {1..9} Island sequence {A0..F9} Commencement Code { } Riversegment Pfaffstetter code { } Rhine outlet: A Rhine source: A Long river on Ibiza: A Longest Riversegment code is in Dnepr