HydroBASINS lev08 watershed · #2080246140
Bassin de Storstraum–Småstraumkanalen
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 7 administrative regions : Bykle, Drangedal, Fyresdal, Kviteseid, Nissedal +2
Sub-basin area
720,3km²
Upstream area
720,3km²
Discharge
16,74m³/s
Mean elev.
698m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
7 dept-equivalent regions (GADM L2)
- 281.9 km²38.9% of basin
- 223.8 km²30.9% of basin
- 105.9 km²14.6% of basin
- 86.7 km²12.0% of basin
- 17.0 km²2.3% of basin
- 6.3 km²0.9% of basin
- 2.6 km²0.4% of basin
6 intersecting protected areas
Bandaksliane og Lynglifjell
IUCN IaNature Reserve
4.74 km² overlap
Tårånli
IUCN IaNature Reserve
3.55 km² overlap
Grønhovdåsen
IUCN IaNature Reserve
3.05 km² overlap
Hæstad
IUCN IaNature Reserve
0.74 km² overlap
Krålen
IUCN IaNature Reserve
0.70 km² overlap
Grytdalen
IUCN IaNature Reserve
0.43 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 381 distinct species · 16 623 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Storstraum–Småstraumkanalen : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 104 interactions GloBI sur 6 types (connectance 15.6%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
2,4°C
Annual rain
1 053mm
Moisture idx (CMI)
0,56
Runoff
766mm/an
PET
444mm
AET
418mm
Mean slope
10,6°
Water table
476cm
Forest
76%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)