Converting the Soil Map of Belgium into the WRB
Converting the Soil Map of Belgium into the WRB
Converting the Soil Map of Belgium into the WRB
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<strong>Converting</strong> <strong>the</strong> legend <strong>of</strong> <strong>the</strong> <strong>Soil</strong> <strong>Map</strong> <strong>of</strong> <strong>Belgium</strong> <strong>into</strong><br />
World Reference Base for <strong>Soil</strong> Resources<br />
- strengths and constraints -<br />
Stefaan Dondeyne<br />
in collaboration with<br />
Antoine Bouhoun, Xavier Legrain, Karen Vancampenhout, Geert Baert, Carole Ampe,<br />
Nathalie Cools, Roger Langohr, Eric Van Ranst, Jean Chapelle, Jozef Deckers<br />
Lincoln, June 2012
Outline<br />
• Background and Objectives<br />
• Legend <strong>of</strong> <strong>the</strong> <strong>Soil</strong> <strong>Map</strong> <strong>of</strong> <strong>Belgium</strong><br />
• Examples <strong>of</strong> conversion<br />
• Examples <strong>of</strong> legends according to <strong>WRB</strong><br />
• Discussion and conclusion
Background and objectives<br />
• In Europe soil mapping was done according to different<br />
National Classification Systems<br />
• For EU policies: need to correlate and harmonise soil maps
• Developed a method to convert <strong>the</strong> legend <strong>of</strong> <strong>the</strong> <strong>Soil</strong> <strong>Map</strong><br />
<strong>of</strong> <strong>Belgium</strong> <strong>into</strong> <strong>the</strong> <strong>WRB</strong> (<strong>WRB</strong>-2007)<br />
• Test this in three case study areas on a 1:20,000 scale (<strong>the</strong><br />
original maps)<br />
Background and objectives<br />
• Assessed how this can be used for a small scale map<br />
(1:250,000) for <strong>the</strong> Flemish region (nor<strong>the</strong>rn part)
Legend <strong>of</strong> <strong>Soil</strong> <strong>Map</strong> <strong>of</strong> <strong>Belgium</strong><br />
Belgian <strong>Soil</strong> Survey project<br />
1947 – 1991<br />
• ~ 15,000 pr<strong>of</strong>iles described (1 per 2 km²),<br />
with analytical data <strong>of</strong> about 80,000 horizons<br />
• ~ 1 or 2 soil augering per hectare
1: 20,000 scale<br />
Legend <strong>of</strong> <strong>Soil</strong> <strong>Map</strong> <strong>of</strong> <strong>Belgium</strong>
Legend <strong>of</strong> <strong>Soil</strong> <strong>Map</strong> <strong>of</strong> <strong>Belgium</strong>
Legend <strong>of</strong> <strong>Soil</strong> <strong>Map</strong> <strong>of</strong> <strong>Belgium</strong><br />
w A h a 1
Legend <strong>of</strong> <strong>Soil</strong> <strong>Map</strong> <strong>of</strong> <strong>Belgium</strong><br />
w A h a 1
Translation key<br />
L.. ~ silt loam<br />
.h. stagnic<br />
properties<br />
..c strongly<br />
“mottled”<br />
Bt horizon<br />
Example <strong>of</strong> Unequivocal conversion<br />
<strong>WRB</strong>: Stagnic Cutanic Albeluvisol<br />
(Siltic)
..m = deep anthropogenic surface horizon<br />
Zbm<br />
<strong>WRB</strong>: Plaggic Anthrosol (Arenic)<br />
Zdm<br />
Example <strong>of</strong> not an<br />
Unequivocal conversion<br />
Endogleyic Terric Anthrosol (Arenic)
..m = deep anthropogenic surface horizon<br />
Zbm<br />
<strong>WRB</strong>: Plaggic Anthrosol (Arenic)<br />
Zdm<br />
Example <strong>of</strong> not an<br />
Unequivocal conversion<br />
Endogleyic Terric Anthrosol (Arenic)
Case study in silt-loam region Legend according to <strong>WRB</strong><br />
Nudiargic Luvisol Colluvic Cambisol/Regosol<br />
Colluvic Luvisol<br />
(sheet 103w Duisburg)<br />
Eutric Fluvisol and Fluvic Cambisol<br />
Nudiargic Luvisol with<br />
Calcaric Cambisol/Regosol
Case study in sandy region<br />
Reference <strong>Soil</strong> Groups as first entry and<br />
determining <strong>the</strong> colour<br />
Coming from 207 mapping units in original map<br />
- 10 units at RSG level<br />
- 37 units when including <strong>the</strong> qualifiers<br />
Legend according to <strong>WRB</strong><br />
Legend qualifiers limited to one or two<br />
- which can be inferred from <strong>the</strong> original legend<br />
- which are meaningful for land management
Scale<br />
1:250,000<br />
• Main qualifiers – clear morphologic features<br />
• Drainage qualifiers, separate (“GIS logic”)<br />
• idem “Abruptic/Ruptic”<br />
• Information on texture separate according<br />
to National system
Discussion and conclusions<br />
Legend <strong>of</strong> soil map <strong>of</strong> <strong>Belgium</strong><br />
• Belgian mapping units, very detailed information which <strong>of</strong>ten has no<br />
correspondence in <strong>WRB</strong> - particularly in terms <strong>of</strong> texture, substratum<br />
and drainage (we end up with lots <strong>of</strong> “Endogleyic”)<br />
• “Automatic” conversion is not possible; need to take local context <strong>into</strong><br />
account.<br />
Legend according to <strong>WRB</strong><br />
• Conversion leads to maps with less information, but better<br />
“readable” - for being “simpler” and in an “international language”<br />
• Form a good base for generalising to smaller scale maps<br />
• <strong>WRB</strong>, having a limited hierarchy, presents a great degree <strong>of</strong><br />
flexibility which allows representing our current soil information<br />
conveniently in an internationally understandable legend.
Thanks for your attention<br />
Stefaan.Dondeyne@ees.kuleuven.be<br />
More at<br />
https://lirias.kuleuven.be/handle/123456789/346645
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