HydroBASINS lev08 watershed · #2080031070
Bassin de Ramsåsån
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, Sollefteå, Sundsvall, Timrå
Sub-basin area
1 654,6km²
Upstream area
1 654,6km²
Discharge
0,98m³/s
Mean elev.
128m
Administrative coverage
5 dept-equivalent regions (GADM L2)
- 861.0 km²51.7% of basin
- 442.6 km²26.6% of basin
- 221.1 km²13.3% of basin
- 46.2 km²2.8% of basin
- 1.9 km²0.1% of basin
30 intersecting protected areas
2000937 Icktjärnsberget
IUCN IaNature Reserve
2.83 km² overlap
2000649 Smitingen-Härnöklubb
IUCN IIINature Reserve
2.73 km² overlap
2000483 Åstön
IUCN IaNature Reserve
2.55 km² overlap
2000668 Sör-Lappmyran
IUCN IaNature Reserve
2.54 km² overlap
Sör-Lappmyran
IUCN IaNatura 2000 SPA
2.54 km² overlap
Sör-Lappmyran
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.54 km² overlap
Sör-Lappmyran
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.54 km² overlap
Sör-Lappmyran
IUCN IaNatura 2000 SCI
2.54 km² overlap
Smitingen-Härnöklubb
IUCN IIINatura 2000 SCI
2.17 km² overlap
21 more protected areassorted by overlap area
Smitingen-Härnöklubb
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.17 km² overlap
Nature Reserve
1.56 km² overlap
2052721 Rudtjärnberget
IUCN IaNature Reserve
1.48 km² overlap
Långvattenhöjden
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.37 km² overlap
Långvattenhöjden
IUCN IaNatura 2000 SCI
1.37 km² overlap
2042908 Långvattenhöjden
IUCN IaNature Reserve
1.37 km² overlap
2045369 Långmyrberget
IUCN IaNature Reserve
1.10 km² overlap
2045368 Surpussberget
IUCN IaNature Reserve
1.10 km² overlap
2045389 Nävertjärnsskogen
IUCN IaNature Reserve
0.79 km² overlap
2043086 Nävertjärnsdalen
IUCN IaNature Reserve
0.77 km² overlap
2045370 Gillersberget
IUCN IaNature Reserve
0.50 km² overlap
2002835 Brånsån
IUCN IaNature Reserve
0.47 km² overlap
2021446 Grenigtmyran
IUCN IaNature Reserve
0.45 km² overlap
Nature Reserve
0.45 km² overlap
Nature Reserve
0.41 km² overlap
Älgberget-Björnberget
IUCN IaNatura 2000 SCI
0.41 km² overlap
Älgberget-Björnberget
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.41 km² overlap
2044938 Grannässkogen
IUCN IaNature Reserve
0.40 km² overlap
2000478 Vägsjöknösen
IUCN IVNature Reserve
0.39 km² overlap
Vägsjöknösen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.39 km² overlap
Vägsjöknösen
IUCN IVNatura 2000 SCI
0.39 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
9 088 distinct species · 480 592 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Ramsåsån : 29 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 74 interactions GloBI sur 4 types (connectance 11.7%, filtre Serrano α=0.2). 7 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°
2,9°C
Annual rain
669mm
Moisture idx (CMI)
0,22
Runoff
346mm/an
PET
518mm
AET
407mm
Mean slope
5,1°
Water table
288cm
Forest
93%
Crops
0%
Urban
1%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)