HydroBASINS lev08 watershed · #2080186420
Bassin de Höån
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 : Härnösand, Kramfors, Ragunda, Sollefteå, Sundsvall
Sub-basin area
525,4km²
Upstream area
525,4km²
Discharge
6,3m³/s
Mean elev.
285m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 422.2 km²79.9% of basin
- 32.6 km²6.2% of basin
- 31.2 km²5.9% of basin
- 27.4 km²5.2% of basin
- 15.2 km²2.9% of basin
14 intersecting protected areas
Sörgraninge
IUCN Not ApplicableVoluntary set-aside areas
5.28 km² overlap
Sörgraninge
IUCN Not ApplicableVoluntary set-aside areas
2.97 km² overlap
2000642 Vällingsjö urskog
IUCN IaNature Reserve
2.85 km² overlap
Vällingsjö urskog
IUCN IaNatura 2000 SCI
2.29 km² overlap
Vällingsjö urskog
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.29 km² overlap
Nature Reserve
0.87 km² overlap
Bjursjöberget-Hålldammberget
IUCN IaNatura 2000 SCI
0.84 km² overlap
Bjursjöberget-Hålldammberget
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.84 km² overlap
2051783 Bastusjöklippen
IUCN IaNature Reserve
0.51 km² overlap
5 more protected areassorted by overlap area
2041848 Horntjärnberget
IUCN IaNature Reserve
0.30 km² overlap
Horntjärnberget
IUCN IaNatura 2000 SCI
0.30 km² overlap
Horntjärnberget
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.30 km² overlap
n/a.
IUCN IVNature conservation agreement, County Administrative Board
0.07 km² overlap
SK 342-1999
IUCN IaHabitat Protection Area
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 358 distinct species · 51 927 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Höån : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 69 interactions GloBI sur 5 types (connectance 12.3%, 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°
1,8°C
Annual rain
643mm
Moisture idx (CMI)
0,21
Runoff
379mm/an
PET
507mm
AET
406mm
Mean slope
6,0°
Water table
275cm
Forest
93%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)