HydroBASINS lev08 watershed · #2080260350
Bassin de Stallbackaån
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 6 administrative regions : Grästorp, Lilla Edet, Mellerud, Trollhättan, Uddevalla +1
Sub-basin area
702,4km²
Upstream area
48 627,7km²
Discharge
558,64m³/s
Mean elev.
70m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Spångabäcken1012 km²
- Bassin · #20802551301 km²
6 dept-equivalent regions (GADM L2)
- 413.6 km²58.6% of basin
- 117.0 km²16.6% of basin
- 71.5 km²10.1% of basin
- 50.0 km²7.1% of basin
- 39.0 km²5.5% of basin
- 14.9 km²2.1% of basin
30 intersecting protected areas
Nature Reserve
32.73 km² overlap
Nature Reserve
14.22 km² overlap
Halle- Hunneberg
IUCN IVNature conservation agreement
11.23 km² overlap
Nature Reserve
7.31 km² overlap
Halle- och Hunnebergs branter
IUCN Not ReportedSpecial Protection Area (Birds Directive)
5.48 km² overlap
Halle- och Hunnebergs branter
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.48 km² overlap
Halle- och Hunnebergs branter
IUCN IIINatura 2000 SPA
5.48 km² overlap
Halle- och Hunnebergs branter
IUCN IIINatura 2000 SCI
5.48 km² overlap
Halle- Hunneberg
IUCN IVNature conservation agreement
5.39 km² overlap
21 more protected areassorted by overlap area
Öjemossarna
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.81 km² overlap
Öjemossarna
IUCN IaNatura 2000 SPA
3.81 km² overlap
Öjemossarna
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.81 km² overlap
Öjemossarna
IUCN IaNatura 2000 SCI
3.81 km² overlap
2000551 Öjemossarna
IUCN IaNature Reserve
3.02 km² overlap
2000529 Hullsjön
IUCN IVNature Reserve
2.70 km² overlap
Hullsjön
IUCN IVNatura 2000 SCI
2.69 km² overlap
Hullsjön
IUCN IVNatura 2000 SPA
2.69 km² overlap
Hullsjön
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.69 km² overlap
Hullsjön
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.69 km² overlap
Halle- Hunneberg
IUCN IVNature conservation agreement
1.56 km² overlap
2003061 Långsbergen
IUCN IVNature Reserve
1.21 km² overlap
2000362 Slättbergen
IUCN Not AssignedNature Conservation Area
0.84 km² overlap
2025792 Del av Halleberg (SV Lindekleven)
IUCN Not AssignedWildlife and Plant Sanctuary
0.81 km² overlap
2000607 Öjemossarna
IUCN IaNature Reserve
0.79 km² overlap
2000561 Tunhems ekhagar
IUCN IVNature Reserve
0.73 km² overlap
2001129 Dalbobergen
IUCN Not AssignedNature Reserve
0.70 km² overlap
2014782 Älvrummet
IUCN IaNature Reserve
0.61 km² overlap
2000539 Åkerström
IUCN IVNature Reserve
0.52 km² overlap
2014781 Ryrbäcken
IUCN IaNature Reserve
0.43 km² overlap
Nature Reserve
0.38 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
9 710 distinct species · 1 205 607 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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 Stallbackaån : 17 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 60 interactions GloBI sur 4 types (connectance 21.7%, 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°
6,6°C
Annual rain
758mm
Moisture idx (CMI)
0,25
Runoff
417mm/an
PET
566mm
AET
454mm
Mean slope
1,4°
Water table
120cm
Forest
51%
Crops
37%
Urban
7%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)