River Typology in The Netherlands

From REFORM wiki
Revision as of 12:23, 30 March 2010 by Admin (Talk | contribs)

Jump to: navigation, search

River typology in The Netherlands

General description

In the Netherlands, 12 freshwater river types have been defined (van der Molen and Pot, 2007)[1]. From these, 11 river types have been found to present significantly different ecological conditions for individual fish species (Buijse and Beers 2009). [2]

Classification system

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

References

  1. van der Molen, D.T. and Pot. R [eds.] 2007. Referentie en maatlatten voor natuurlijke watertypen voor de Kaderrichtlijn Water. STOWA rapport 2007-32, 361 pp. (original document in Dutch)
  2. Buijse, T., and Beers, M. 2009. References and metrics for fish in rivers in The Netherlands, 10 pp. (original document in English)