institute for environment and sustainability1 sea outlet coding knowing to where the water flows to...
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Institute for Environment and Sustainability 1
Sea outlet coding
Knowing to where the water flows to with 4 digits.
…a Structured basis to code hydrological features
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Institute for Environment and Sustainability 2
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
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Institute for Environment and Sustainability 3
Purpose of codingThe purpose of hydrological coding is to understand through the codingthe 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 determinethe code for his part of the world
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Institute for Environment and Sustainability 4
Hydrological systems definition
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Institute for Environment and Sustainability 5
Seas
SYSTEM SEA NAMEA 1 Northern Atlantic OceanA 2 Norwegian SeaA 4 Celtic Sea and ChannelsA 5 North SeaA 6 Baltic SeaA 7 Western Mediterranean SeaA 8 Eastern Mediterranean SeaA 9 Black SeaN 7 Barentz Sea EastN 8 Barentz Sea WestN 9 White SeaC 1 Caspian SeaS 1 Southern Atlantic OceanT 9 Trasimeno LakeQ 9 Prespa LakeZ 9 Tuz Salt LakeV 9 Van LakeH 9 Orumiyeh Salt Lake
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Institute for Environment and Sustainability 6
Commencement
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Institute for Environment and Sustainability 7
Level of Detail
Primary catchments of ±10 km2
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Institute for Environment and Sustainability 8
Transfer to WFD
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Institute for Environment and Sustainability 9Ordering and aggregation
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Institute for Environment and Sustainability 10
Ordering the Seaoutlets
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Institute for Environment and Sustainability 11
Sea Aggregation
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Institute for Environment and Sustainability 12
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.
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Institute for Environment and Sustainability 13
Island coding example
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Institute for Environment and Sustainability 14
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: A500000081Rhine source: A500000089
Long river on Ibiza: A701000029Longest Riversegment code is 1985982445 in Dnepr