HydroBASINS lev08 watershed · #2080125820
Bassin de Siosjoki
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 2 administrative regions across 2 countries : Lapland, Pajala
Sub-basin area
1 037,5km²
Upstream area
1 037,5km²
Discharge
6,45m³/s
Mean elev.
312m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 1044.3 km²99.9% of basin
- 0.6 km²0.1% of basin
13 intersecting protected areas
National Park
378.81 km² overlap
Pallas-Ounastunturi
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
340.29 km² overlap
Pallas-Ounastunturi
IUCN Not ReportedSpecial Protection Area (Birds Directive)
340.29 km² overlap
Tornionjoen-Muonionjoen vesistöalue
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
84.32 km² overlap
Ylläs-Aakenus
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
35.16 km² overlap
Metsätalouden ympäristötukikohteet Lappi
IUCN Not AssignedForestry environmental aid contracts (OECM)
1.90 km² overlap
Metsälain erityisen tärkeät elinympäristöt Lappi
IUCN Not AssignedForest habitats of special importance according to the Forest Act (OECM)
1.50 km² overlap
Private Nature Reserve
0.34 km² overlap
Poromaan luonnonsuojelualue
IUCN IVPrivate Nature Reserve
0.23 km² overlap
4 more protected areassorted by overlap area
Herb Rich Forest Reserve
0.15 km² overlap
Torne och Kalix älvsystem
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.06 km² overlap
Torne och Kalix älvsystem
IUCN Not AssignedNatura 2000 SCI
0.06 km² overlap
Oloksen luonnonsuojelualue
IUCN IVState Forest Protected by Decision of the Forest and Park Service
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 674 distinct species · 49 114 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 46 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 Siosjoki : 30 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 121 interactions GloBI sur 5 types (connectance 11.7%, filtre Serrano α=0.2). 16 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°
-2,2°C
Annual rain
487mm
Moisture idx (CMI)
0,17
Runoff
217mm/an
PET
405mm
AET
327mm
Mean slope
4,7°
Water table
140cm
Forest
63%
Crops
0%
Urban
0%
Protected
36%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)