Division Water category Rivers Geographical Intercalibration Group Northern rivers
United Kingdom
Description of types that have been intercalibrated
| Type | River characterisation | Catchment areaof stretch (km2) | Altitude and geomorphology | Alkalinity(meq/l) | Organic material(mg Pt/l) |
|---|---|---|---|---|---|
| R-N1 | Small lowland siliceous moderate alkalinity | 10 — 100 | < 200 m a.s.l. or below the highest coastline | 0,2 — 1 | < 30 (< 150 in Ireland) |
| R-N3 | Small/medium lowland organic low alkalinity | 10 — 1 000 | < 0,2 | > 30 | |
| R-N4 | Medium lowland siliceous moderate alkalinity | 100 — 1 000 | 0,2 — 1 | < 30 | |
| R-N5 | Small mid-altitude siliceous low alkalinity | 10 — 100 | Between lowland and highland | < 0,2 | < 30 |
| R-N9 | Small/medium mid-altitude siliceous low alkalinity organic (humic) | 10 — 1 000 | Between lowland and highland | < 0,2 | > 30 |
Countries sharing types that have been intercalibrated:
R-N1: R-N3: R-N4: R-N5: R-N9:
Finland, Ireland, Norway, Sweden, United Kingdom
Finland, Ireland, Norway, Sweden, United Kingdom
Finland, Norway, Sweden, United Kingdom
Finland, Norway, Sweden, United Kingdom
Finland, Norway, Sweden
- NORTHERN RIVERS GEOGRAPHICAL INTERCALIBRATION GROUP RESULTS Biological Quality Element Benthic invertebrate fauna (methods sensitive for organic enrichment and general degradation)
- Biological Quality Element Benthic invertebrate fauna (methods sensitive for acidification)
- NORTHERN RIVERS GEOGRAPHICAL INTERCALIBRATION GROUP RESULTS Biological Quality Element Macrophytes and Phytobenthos Sub-Biological Quality Element Macrophytes
- NORTHERN RIVERS GEOGRAPHICAL INTERCALIBRATION GROUP RESULTS Biological Quality Element Macrophytes and Phytobenthos Sub-Biological Quality Element Phytobenthos