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EA:  WETLAND_SURFACE_FORM

Status: STD 2005/06/07
Code: 1600

Concept definition: The type and/or structure of a <WETLAND>; wetland surface form.
 
Attribute value type: ENUMERATION
Reference type: IR
Reference: [FACC, Annex B: BOC]
Supplemental references:  

Enumerants (presented in a natural order)
Status Attribute label Enumerant label ▾ Concept definition Code Ref type Reference Supplemental references
STD
2005/06/07
WETLAND_SURFACE_FORM ATLANTIC_PLATEAU_BOG A <BOG> with a flat to undulating <SURFACE> raised above the surrounding <LAND>; Atlantic plateau bog. The edges of the <BOG> commonly slope steeply downwards to the mineral soil <LAND>. Large pools scattered on the <BOG> reach depths of 2 to 4 metres. 1 IR [ECORC, Wetland Surface Forms, B09]  
STD
2005/06/07
WETLAND_SURFACE_FORM BASIN_BOG A <BOG> situated in a basin with essentially closed drainage that receives <WATER> from <PRECIPITATION> and <RUN_OFF> from the immediate surroundings; basin bog. The <SURFACE> of the <BOG> is flat with peat generally deepest at the centre. 2 IR [ECORC, Wetland Surface Forms, B13]  
STD
2005/06/07
WETLAND_SURFACE_FORM BASIN_SWAMP A <SWAMP> developed in a topographically defined basin where <WATER> derived locally may be augmented by drainage from other parts of the watershed; basin swamp. Accumulation of well-decomposed peat is shallow (less than 0,5 metre) at the edge but may reach 2 metres at the centre. 3 IR [ECORC, Wetland Surface Forms, S04]  
STD
2005/06/07
WETLAND_SURFACE_FORM BLANKET_BOG A <BOG> consisting of extensive peat deposits that occur more or less uniformly over gently sloping hills and valleys; blanket bog. 4 IR [ECORC, Wetland Surface Forms, B16]  
STD
2005/06/07
WETLAND_SURFACE_FORM DOMED_BOG A large <BOG> (<<OUTSIDE_DIAMETER>> usually greater than 500 metres) with a convex <SURFACE> rising several metres above the surrounding <LAND>; domed bog. The centre usually drains in all <DIRECTION>s, and small crescentic pools commonly form around the highest point. A concentric pattern is formed if the highest point is in the centre, while an eccentric pattern is formed if the highest point is off-centre. Peat development is usually greater than 3 metres deep. 5 IR [ECORC, Wetland Surface Forms, B04]  
STD
2005/06/07
WETLAND_SURFACE_FORM FLAT_BOG A <BOG> having a flat, featureless <SURFACE> and occurring in broad, poorly defined <TERRAIN_DEPRESSION>s; flat bog. The depth of peat is generally uniform. 6 IR [ECORC, Wetland Surface Forms, B14]  
STD
2005/06/07
WETLAND_SURFACE_FORM HORIZONTAL_FEN A fen with a gently sloping, featureless <SURFACE>; horizontal fen. Occupies broad, often ill-defined <TERRAIN_DEPRESSION>s and may interconnect with other fens. Peat accumulation is generally uniform. 7 IR [ECORC, Wetland Surface Forms, F13]  
STD
2005/06/07
WETLAND_SURFACE_FORM LOWLAND_POLYGON_BOG A <BOG> with flat-topped or convex peat <SURFACE>s (often referred to as "high-centre polygons") separated by <TRENCH>s over wedges of <ICE> that form a polygonal pattern when viewed from above; lowland polygon bog. The peat was deposited in a permafrost environment as shown by internal structures. 8 IR [ECORC, Wetland Surface Forms, B20]  
STD
2005/06/07
WETLAND_SURFACE_FORM NORTHERN_RIBBED_FEN A fen with parallel, low peat <RIDGE>s ("strings") alternating with wet hollows or shallow pools, oriented across the major slope at right angles to water movement; northern ribbed fen. The depth of peat is greater than 1 metre. 9 IR [ECORC, Wetland Surface Forms, F01]  
STD
2005/06/07
WETLAND_SURFACE_FORM PALSA_BOG Boggy <TUNDRA> with a core of frozen peat, in which ground <ICE> is partly responsible for the formation of palsas; palsa bog [DECOL, "palsa bog" and "palsa"]. 10 IR [FACC, Annex B, BOC:1]  

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