HydroBASINS lev08 watershed · #2080177420
Bassin de Gigån
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 2 administrative regions : Åsele, Örnsköldsvik
Sub-basin area
1 104,3km²
Upstream area
2 221,9km²
Discharge
25,63m³/s
Mean elev.
339m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Tjesjöån214 km²
- Bassin de Gigån93 km²
2 dept-equivalent regions (GADM L2)
- 868.2 km²78.1% of basin
- 243.1 km²21.9% of basin
30 intersecting protected areas
2001977 Björnlandet
IUCN IINational Park
13.06 km² overlap
Björnlandets nationalpark
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
13.04 km² overlap
Björnlandets nationalpark
IUCN Not ReportedSpecial Protection Area (Birds Directive)
13.04 km² overlap
Björnlandets nationalpark
IUCN IINatura 2000 SPA
13.04 km² overlap
Björnlandets nationalpark
IUCN IINatura 2000 SCI
13.04 km² overlap
Gammtratten
IUCN IaNatura 2000 SPA
3.30 km² overlap
Gammtratten
IUCN IaNatura 2000 SCI
3.30 km² overlap
Gammtratten
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.30 km² overlap
Gammtratten
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.30 km² overlap
21 more protected areassorted by overlap area
2000674 Gammtratten
IUCN IaNature Reserve
3.27 km² overlap
2015001 Svanamyran
IUCN IaNature Reserve
2.85 km² overlap
2015000 Tallkullarna
IUCN IaNature Reserve
2.77 km² overlap
Nature Reserve
1.72 km² overlap
Käringberget
IUCN IVNature conservation agreement
1.60 km² overlap
2014989 Grovsjöbrännan
IUCN IaNature Reserve
1.48 km² overlap
2014879 Ormsjökullen
IUCN IaNature Reserve
1.44 km² overlap
2001657 Vammasjön
IUCN IaNature Reserve
1.36 km² overlap
Blakliden
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.31 km² overlap
Blakliden
IUCN IaNatura 2000 SCI
1.31 km² overlap
2010953 Blakliden
IUCN IaNature Reserve
1.30 km² overlap
Lilla Stutvattnet
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.17 km² overlap
Lilla Stutvattnet
IUCN IaNatura 2000 SCI
1.17 km² overlap
2001660 Lilla Stutvattnet
IUCN IaNature Reserve
1.17 km² overlap
2014927 Rötjärnberget
IUCN IaNature Reserve
1.08 km² overlap
Skalberget
IUCN IaNatura 2000 SCI
1.04 km² overlap
Skalberget
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.04 km² overlap
2001659 Skalberget
IUCN IaNature Reserve
1.04 km² overlap
2014929 Tjäderkullen
IUCN IaNature Reserve
1.01 km² overlap
2014925 Stenbittjärnen
IUCN IaNature Reserve
0.92 km² overlap
Vammasjön
IUCN IaNatura 2000 SCI
0.91 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 366 distinct species · 101 097 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Gigån : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 52 interactions GloBI sur 5 types (connectance 7.0%, 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°
0,7°C
Annual rain
606mm
Moisture idx (CMI)
0,19
Runoff
373mm/an
PET
492mm
AET
392mm
Mean slope
5,5°
Water table
250cm
Forest
97%
Crops
0%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)