Difference between revisions of "BQE"

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!Type ||  Name  ||  Slope (m/km)  ||  Flow velocity (cm/s)  ||  Geology (>50%)  ||  Width (m)  ||  Catchment (km<sup>2</sup>)
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|Type ||  Name  ||  Slope (m/km)  ||  Flow velocity (cm/s)  ||  Geology (>50%)  ||  Width (m)  ||  Catchment (km<sup>2</sup>)
 
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|R4  || Permanent slow-flowing headwater on sandy soil || <1 || <50 || Silicious || 0-3 || 0-10
 
|R4  || Permanent slow-flowing headwater on sandy soil || <1 || <50 || Silicious || 0-3 || 0-10

Revision as of 17:11, 13 April 2010

Biological Quality Elements (BQE)

General description

For the implementation of the Water Framework Directive, the assessment of ecological status of water bodies is based on biological indicators from several groups of organisms known as biological quality elements (BQE). For inland surface waters the BQE's are:

Phytoplankton || Macrophytes and phytobenthos || Benthic invertebrates || Fish
Iwrm-hau gauche.gif Delft-Cluster-logo.jpg Iwrm-hau gauche.gif Delft-Cluster-logo.jpg
Type Name Slope (m/km) Flow velocity (cm/s) Geology (>50%) Width (m) Catchment (km2)
R4 Permanent slow-flowing headwater on sandy soil <1 <50 Silicious 0-3 0-10
R5 Slow-flowing middle/lower course on sandy soil <1 <50 Silicious 8-25 100-200
R6 Slow-flowing rivulet on sandy/clay soil <1 <50 Silicious 8-25 100-200
R7 Slow-flowing river on sandy/clay soil <1 <50 Silicious >25 >200
R8 Freshwater tidal river on sandy/clay soil <1 <50 Silicious >25 >200
R10 Slow-flowing middle/lower course on calcareous soil <1 <50 Calcareous 3-8 10-100
R12 Slow-flowing middle/lower course on peaty soil <1 <50 Organic 3-8 10-100
R14 Fast-flowing middle/lower course on sandy soil >1 >50 Silicious 3-8 10-100
R15 Fast-flowing rivulet on siliceous soil >1 >50 Silicious 8-25 100-200
R16 Fast-flowing middle/lower course on sandy or gravel soil >1 >50 Silicious >25 >200
R18 Fast-flowing middle/lower course on calcareous soil >1 >50 Calcareous 3-8 10-100



The indicators may be related to the composition, abundance and diversity of species, as well as the presence or absence of some disturbance-sensitive species.