HydroBASINS lev08 watershed · #2080033320

Bassin de Grönån

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 9 administrative regions : Ale, Alingsås, Göteborg, Kungälv, Lerum +4

32% lakePfafstetter: 24480101

Sub-basin area

949km²

Upstream area

49 859,1km²

Discharge

603,9m³/s

Mean elev.

77m

Administrative coverage

Hydrographic chain

▼ Drains into

Outlet (drains to ocean / endorheic)

▲ Receives from 2 basins

Bassin de Stallbackaån702 km²
Bassin de Bredängsån282 km²

9 dept-equivalent regions (GADM L2)

Ale
Västra Götaland · Sweden
297.3 km²
31.2% of basin
Lilla Edet
Västra Götaland · Sweden
273.5 km²
28.7% of basin
Kungälv
Västra Götaland · Sweden
187.4 km²
19.6% of basin
Göteborg
Västra Götaland · Sweden
100.3 km²
10.5% of basin
Trollhättan
Västra Götaland · Sweden
61.6 km²
6.5% of basin
Lerum
Västra Götaland · Sweden
13.9 km²
1.5% of basin
Uddevalla
Västra Götaland · Sweden
11.4 km²
1.2% of basin
Stenungsund
Västra Götaland · Sweden
7.7 km²
0.8% of basin

1 moreFull L2 list

Alingsås0.9 km² · 0.1%

30 intersecting protected areas

2000406 Vättlefjäll
IUCN V
Nature Reserve
18.86 km² overlap
Vättlefjäll
IUCN Not Reported
Special Protection Area (Birds Directive)
13.06 km² overlap
Vättlefjäll
IUCN V
Natura 2000 SPA
13.06 km² overlap
Svartedalen
IUCN Not Reported
Special Protection Area (Birds Directive)
11.66 km² overlap
Svartedalen
IUCN V
Natura 2000 SPA
11.66 km² overlap
2001074 Svartedalens natur- och friluftsområde
IUCN V
Nature Reserve
10.19 km² overlap
Göta älv-Nordre älvs dalgång
IUCN V
Natura 2000 SPA
10.05 km² overlap
Göta älv-Nordre älvs dalgång
IUCN Not Reported
Special Protection Area (Birds Directive)
10.05 km² overlap
2000793 Göta och Nordre älvs dalgång
IUCN V
Nature Reserve
8.21 km² overlap

21 more protected areassorted by overlap area

Nordre älvs estuarium
IUCN V
Wetland of International Importance (Ramsar Site)
4.77 km² overlap
Svartedalens naturskogar
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
4.63 km² overlap
Svartedalens naturskogar
IUCN V
Natura 2000 SCI
4.63 km² overlap
Bredfjället
IUCN Ia
Natura 2000 SPA
4.58 km² overlap
Bredfjället
IUCN Ia
Natura 2000 SCI
4.58 km² overlap
Bredfjället
IUCN Not Reported
Special Protection Area (Birds Directive)
4.58 km² overlap
Bredfjället
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
4.58 km² overlap
2041711 Öxnäs
IUCN V
Nature Reserve
4.54 km² overlap
Nordre älvs estuarium
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
3.45 km² overlap
Nordre älvs estuarium
IUCN Not Reported
Special Protection Area (Birds Directive)
3.45 km² overlap
Nordre älvs estuarium
IUCN V
Natura 2000 SPA
3.45 km² overlap
Nordre älvs estuarium
IUCN V
Natura 2000 SCI
3.45 km² overlap
Nordre älvs estuarium
IUCN Not Reported
Marine Protected Area (OSPAR)
3.45 km² overlap
2000372 Bredfjället
IUCN Ia
Nature Reserve
3.42 km² overlap
2002911 Nordre älvs estuarium
IUCN V
Nature Reserve
3.18 km² overlap
Risveden
IUCN Not Reported
Special Protection Area (Birds Directive)
2.86 km² overlap
Risveden
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
2.86 km² overlap
Risveden
IUCN Ia
Natura 2000 SCI
2.86 km² overlap
Risveden
IUCN Ia
Natura 2000 SPA
2.86 km² overlap
2000344 Svartedalens vildmarksområde
IUCN Ia
Nature Reserve
2.65 km² overlap
2021585 Risvedens vildmark
IUCN Ib
Nature Reserve
2.53 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

9 224 distinct species · 989 870 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 32 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).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Grönån : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 81 interactions GloBI sur 5 types (connectance 15.3%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.153

Patrimoniales

Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

6,9°C

Annual rain

806mm

Moisture idx (CMI)

0,30

Runoff

489mm/an

PET

564mm

AET

460mm

Mean slope

3,3°

Water table

240cm

Forest

74%

Crops

21%

Urban

Protected

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)