HydroBASINS lev08 watershed · #2080029650
Bassin de Perhonjoki
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, Ostrobothnia
Sub-basin area
467,9km²
Upstream area
4 341,9km²
Discharge
33,74m³/s
Mean elev.
21m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Köyhäjoki570 km²
- Bassin de Kronoby å27 km²
2 dept-equivalent regions (GADM L2)
- 251.1 km²53.3% of basin
- 219.7 km²46.7% of basin
27 intersecting protected areas
Iso Ristineva - Pikku Ristineva
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.76 km² overlap
State Nature Reserve
0.58 km² overlap
State Nature Reserve
0.47 km² overlap
Metsälain erityisen tärkeät elinympäristöt Pohjanmaa
IUCN Not AssignedForest habitats of special importance according to the Forest Act (OECM)
0.43 km² overlap
Isosaaren tulvalehto
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.39 km² overlap
Metsälain erityisen tärkeät elinympäristöt Keski-Pohjanmaa
IUCN Not AssignedForest habitats of special importance according to the Forest Act (OECM)
0.35 km² overlap
Ristineva 7
IUCN IVPrivate Nature Reserve
0.33 km² overlap
Kokkolan saaristo (SPA)
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.31 km² overlap
Kokkolan saaristo (SCI)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.31 km² overlap
18 more protected areassorted by overlap area
Kokkolan saaristo/Kokkola Archipelago
IUCN Not ReportedBaltic Sea Protected Area (HELCOM)
0.31 km² overlap
Metsätalouden ympäristötukikohteet Keski-Pohjanmaa
IUCN Not AssignedForestry environmental aid contracts (OECM)
0.18 km² overlap
Metsätalouden ympäristötukikohteet Pohjanmaa
IUCN Not AssignedForestry environmental aid contracts (OECM)
0.14 km² overlap
Private Nature Reserve
0.10 km² overlap
Trullöfjärden 1
IUCN IVPrivate Nature Reserve
0.07 km² overlap
Ristineva5
IUCN IVPrivate Nature Reserve
0.05 km² overlap
Isosaari 1
IUCN IVPrivate Nature Reserve
0.05 km² overlap
Vaarinmetsä, Suomi 100
IUCN IVPrivate Nature Reserve
0.04 km² overlap
Kalvholmen 1
IUCN IVPrivate Nature Reserve
0.04 km² overlap
Private Nature Reserve
0.03 km² overlap
Isosaari 4
IUCN IVPrivate Nature Reserve
0.03 km² overlap
Ristineva 6
IUCN IVPrivate Nature Reserve
0.03 km² overlap
Ristineva 1
IUCN IVPrivate Nature Reserve
0.02 km² overlap
Isosaari 3
IUCN IVPrivate Nature Reserve
0.02 km² overlap
Kokkolan saaristo 3
IUCN IVPrivate Nature Reserve
0.02 km² overlap
Isosaari 2
IUCN IVPrivate Nature Reserve
0.01 km² overlap
Ristineva 2
IUCN IVPrivate Nature Reserve
0.01 km² overlap
Ristineva 8
IUCN IVPrivate Nature Reserve
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 291 distinct species · 111 427 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Perhonjoki : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 76 interactions GloBI sur 3 types (connectance 14.4%, filtre Serrano α=0.2). 10 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°
2,6°C
Annual rain
537mm
Moisture idx (CMI)
0,02
Runoff
237mm/an
PET
528mm
AET
387mm
Mean slope
1,1°
Water table
38cm
Forest
70%
Crops
12%
Urban
3%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)