Difference between revisions of "Catchment characterisation"
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== Data layers and hydromorphologically relevant parameters== | == Data layers and hydromorphologically relevant parameters== | ||
| − | Essential GIS layers: DEM, geology (solid), land cover | + | ''Essential GIS layers:'' DEM, geology (solid), land cover |
| − | Optional GIS layers: soil permeability; geology (superficial). | + | |
| + | ''Optional GIS layers:'' soil permeability; geology (superficial). | ||
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From these derive the catchment area, relief, extent of broad land cover types and extent of broad rock types. The latter can be subdivided according to their water holding properties (aquifers, aquicludes, aquifuges) and susceptibility to weathering / erosion. | From these derive the catchment area, relief, extent of broad land cover types and extent of broad rock types. The latter can be subdivided according to their water holding properties (aquifers, aquicludes, aquifuges) and susceptibility to weathering / erosion. | ||
Latest revision as of 14:42, 22 May 2014
Contents
Catchment characterisation
Aim
Characterisation of the size, morphology, geological/soil and land cover controls on water (including groundwater) and sediment delivery to the drainage network.
Data layers and hydromorphologically relevant parameters
Essential GIS layers: DEM, geology (solid), land cover
Optional GIS layers: soil permeability; geology (superficial).
From these derive the catchment area, relief, extent of broad land cover types and extent of broad rock types. The latter can be subdivided according to their water holding properties (aquifers, aquicludes, aquifuges) and susceptibility to weathering / erosion.
Potential data sources
- Digital Elevation Models [e.g. EU-GDEM)
- CCM2 River and Catchment Database (v2.1)
- Ecrins database
- One Geology Europe
- European soils data base
- CORINE land cover
- JRC Forest Cover Map
Characteristics
Size, morphology and hydrological balance
- Catchment area
- WFD size category
- Maximum, average and minimum elevation
- Relative relief
- WFD elevation zones
- Average rainfall and runoff
Geology and soils
Proportion of catchment with:
- Exposed aquifers
- Rock type classes
- Soil permeability classes
Land cover
Proportion of catchment with:
- Land cover classes (Corine – Level 1)
More details on the characterisation of catchments can be found in chapter 5 of Deliverable 2.1.
