HydroBASINS lev08 watershed · #2080033470
Bassin de Lillälven
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 7 administrative regions across 2 countries : Aremark, Dals-Ed, Halden, Munkedal, Rakkestad +2
Sub-basin area
1 309,5km²
Upstream area
1 309,5km²
Discharge
21,91m³/s
Mean elev.
142m
Administrative coverage
7 dept-equivalent regions (GADM L2)
- 537.5 km²40.8% of basin
- 395.9 km²30.1% of basin
- 136.8 km²10.4% of basin
- 92.4 km²7.0% of basin
- 90.2 km²6.8% of basin
- 58.0 km²4.4% of basin
- 5.9 km²0.4% of basin
30 intersecting protected areas
Lundsneset
IUCN IaNature Reserve
26.26 km² overlap
Lundsneset
IUCN Not ReportedEmerald Network
26.06 km² overlap
Tresticklan-Boksjön
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
17.22 km² overlap
Tresticklan-Boksjön
IUCN IINatura 2000 SCI
17.22 km² overlap
2001215 Tresticklan
IUCN IINational Park
13.69 km² overlap
Kynnefjäll
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
12.54 km² overlap
Kynnefjäll
IUCN IbNatura 2000 SCI
12.54 km² overlap
Kynnefjäll
IUCN Not ReportedSpecial Protection Area (Birds Directive)
12.54 km² overlap
Kynnefjäll
IUCN IbNatura 2000 SPA
12.54 km² overlap
21 more protected areassorted by overlap area
Vestfjella
IUCN IaNature Reserve
10.10 km² overlap
Idefjorden
IUCN Not AssignedNatura 2000 SCI
8.32 km² overlap
Idefjorden
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
8.32 km² overlap
Prestebakkefjella
IUCN IaNature Reserve
6.89 km² overlap
2000722 Kynnefjäll A
IUCN IaNature Reserve
6.41 km² overlap
Berby
IUCN Not ReportedEmerald Network
6.35 km² overlap
Berby
IUCN VProtected Landscape
6.28 km² overlap
2000724 Kynnefjäll B
IUCN IbNature Reserve
6.13 km² overlap
Brattås
IUCN Not ReportedEmerald Network
5.79 km² overlap
Brattås
IUCN IaNature Reserve
5.79 km² overlap
Vestfjella
IUCN Not ReportedEmerald Network
4.16 km² overlap
2048658 Boksjön
IUCN IaNature Reserve
3.68 km² overlap
Nature Reserve
3.28 km² overlap
Fuglen og Ømyr
IUCN IaNature Reserve
2.84 km² overlap
Haugbergfjellet
IUCN IaNature Reserve
2.53 km² overlap
2041589 Kynnefjäll - Sätret
IUCN IaNature Reserve
2.08 km² overlap
Bredmossarna-Fisklössjön
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.89 km² overlap
Bredmossarna-Fisklössjön
IUCN IaNatura 2000 SCI
1.89 km² overlap
Nature Reserve
1.89 km² overlap
2000729 Bredmossen
IUCN IaNature Reserve
1.55 km² overlap
Bredmossen-Dalen
IUCN IaNatura 2000 SCI
1.55 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
10 132 distinct species · 543 134 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Lillälven : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 100 interactions GloBI sur 5 types (connectance 17.8%, 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°
6,1°C
Annual rain
807mm
Moisture idx (CMI)
0,36
Runoff
533mm/an
PET
517mm
AET
441mm
Mean slope
3,5°
Water table
257cm
Forest
86%
Crops
4%
Urban
2%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)