HydroBASINS lev08 watershed · #2080029750
Bassin de Siiponjoki
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 : Central Ostrobothnia, Northern Ostrobothnia
Sub-basin area
203,5km²
Upstream area
4 641,2km²
Discharge
37,15m³/s
Mean elev.
28m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Kalajoki819 km²
- Bassin de Vääräjoki564 km²
2 dept-equivalent regions (GADM L2)
- 182.2 km²89.0% of basin
- 22.6 km²11.0% of basin
10 intersecting protected areas
Maristonpakat
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.15 km² overlap
Vihas-Keihäslahti
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.54 km² overlap
Vihas-Keihäslahti
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.54 km² overlap
Private Nature Reserve
0.33 km² overlap
Nuokkuhelmikkä
IUCN IVPrivate Nature Reserve
0.25 km² overlap
Metsälain erityisen tärkeät elinympäristöt Pohjois-Pohjanmaa
IUCN Not AssignedForest habitats of special importance according to the Forest Act (OECM)
0.22 km² overlap
Private Nature Reserve
0.09 km² overlap
Private Nature Reserve
0.06 km² overlap
Metsälain erityisen tärkeät elinympäristöt Keski-Pohjanmaa
IUCN Not AssignedForest habitats of special importance according to the Forest Act (OECM)
0.05 km² overlap
1 more protected areassorted by overlap area
Metsätalouden ympäristötukikohteet Pohjois-Pohjanmaa
IUCN Not AssignedForestry environmental aid contracts (OECM)
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 849 distinct species · 17 632 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 Siiponjoki : 19 espèces reliées par 67 interactions GloBI sur 5 types (connectance 19.1%, filtre Serrano α=0.2). 8 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°
2,3°C
Annual rain
527mm
Moisture idx (CMI)
0,03
Runoff
220mm/an
PET
510mm
AET
378mm
Mean slope
0,9°
Water table
40cm
Forest
80%
Crops
0%
Urban
3%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)