HydroBASINS lev08 watershed · #2080037170
Bassin de Tollåga
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 : Beiarn, Bodø, Gildeskål, Meløy, Rana +2
Sub-basin area
1 205,2km²
Upstream area
1 205,2km²
Discharge
55,86m³/s
Mean elev.
652m
Administrative coverage
7 dept-equivalent regions (GADM L2)
- 1153.5 km²95.1% of basin
- 37.9 km²3.1% of basin
- 8.9 km²0.7% of basin
- 7.0 km²0.6% of basin
- 4.1 km²0.3% of basin
- 1.0 km²0.1% of basin
- 0.8 km²0.1% of basin
10 intersecting protected areas
Emerald Network
316.71 km² overlap
Saltfjellet-Svartisen
IUCN IINational Park
302.95 km² overlap
Láhko
IUCN IINational Park
38.58 km² overlap
Gåsvatnan
IUCN VProtected Landscape
13.45 km² overlap
Leirvika
IUCN Not ReportedEmerald Network
1.07 km² overlap
Leirvika
IUCN IaNature Reserve
1.07 km² overlap
Arstadlia - Tverviknakkan
IUCN Not ReportedEmerald Network
0.89 km² overlap
Arstadlia - Tverrviknakkan
IUCN IaNature Reserve
0.89 km² overlap
Fiskosura
IUCN IaNature Reserve
0.66 km² overlap
1 more protected areassorted by overlap area
Váhcanjohka
IUCN IaNature Reserve
0.55 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 407 distinct species · 207 410 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 21 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 Tollåga : 13 espèces reliées par 38 interactions GloBI sur 2 types (connectance 16.5%, filtre Serrano α=0.2). 9 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°
1,0°C
Annual rain
1 253mm
Moisture idx (CMI)
0,72
Runoff
1 573mm/an
PET
352mm
AET
344mm
Mean slope
14,5°
Water table
377cm
Forest
32%
Crops
0%
Urban
0%
Protected
29%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)