River Typology in The Netherlands
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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
- ↑ 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)
- ↑ Buijse, T., and Beers, M. 2009. References and metrics for fish in rivers in The Netherlands, 10 pp. (original document in English)
