Changes between Version 6 and Version 7 of Datos


Ignore:
Timestamp:
Mar 13, 2012 5:14:42 PM (13 years ago)
Author:
celine
Comment:

--

Legend:

Unmodified
Added
Removed
Modified

  • Datos

    v6 v7  
    77The CCM v2.1 (Catchment Characterisation and Modelling), is a European hydrographical database based on a topographic model (Vogt et al., 2007, http://ccm.jrc.ec.europa.eu/). The CCM2 database includes a hierarchical set of river stretches and catchments based on the Strahler order, a lake layer and structured hydrological feature codes based on the Pfafstetter system (De Jager et al., 2010). The primary catchment unit is the drainage area – this is the smallest entity in this hierarchy and is drained by CCM river stretch. This system allows the identification of all upstream catchments and all river stretches downstream of a given point along the river network. All the river stretches are connected. 
    88 
     9 
     10See ["OriaEda"][[BR]] for CLC, Dams impact, electrofishinh sampling 
    911= Corine Land Cover = 
    1012See ["Corine Land Cover"][[BR]] 
    … …  
    3133||||5.2 Marine waters || 
    3234 
    33 Joining CLC and CCM ["CLC Join"][[BR]] 
     35Joining CLC and CCM ["OriaEda"] [[BR]] 
    3436 
    3537The percentage of each land use category is calculated for each river stretch drainage area, as well as for the area of catchment upstream of each stretch.  
    … …  
    3840= Dams impact = 
    3941 
     42The obstacle pressure is characterised by the cumulative number of structures (dams and weirs) from the sea to the stretch, and the accumulation of scores for the passability of eel at each structure. These scores are based on the assessment criterion of the upstream passability from Steinbach (2009, modified from Steinbach, 2006), that weights different variables of dam construction (waterfall height, roughness, structure profile) using a scoring key that penalizes (+) or facilitates (-) an eel’s upstream passage.