HydroBASINS lev08 watershed · #2080036730
Bassin de Sakselva
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 5 administrative regions : Fosnes, Høylandet, Namsos, Nærøy, Overhalla
Sub-basin area
411,4km²
Upstream area
411,4km²
Discharge
20,97m³/s
Mean elev.
251m
Administrative coverage
5 dept-equivalent regions (GADM L2)
- 360.8 km²87.2% of basin
- 18.8 km²4.5% of basin
- 17.8 km²4.3% of basin
- 14.2 km²3.4% of basin
- 2.2 km²0.5% of basin
6 intersecting protected areas
Storengvatna
IUCN IaNature Reserve
16.02 km² overlap
Migan og Korsbekken
IUCN IaNature Reserve
4.39 km² overlap
Fokktuva
IUCN IaNature Reserve
0.86 km² overlap
Storhøla
IUCN IaNature Reserve
0.23 km² overlap
Nature Reserve
0.19 km² overlap
Heivika
IUCN IaNature Reserve
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 421 distinct species · 5 353 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 43 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 Sakselva : 31 espèces dont 5 patrimoniales (LR IUCN CR/EN/VU) reliées par 63 interactions GloBI sur 5 types (connectance 6.7%, filtre Serrano α=0.2). 13 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°
4,0°C
Annual rain
1 599mm
Moisture idx (CMI)
0,73
Runoff
1 503mm/an
PET
425mm
AET
422mm
Mean slope
12,0°
Water table
427cm
Forest
47%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)