HydroBASINS lev08 watershed · #2080357480
Bassin de Wełna
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 : Oborniki, Wągrowiec
Sub-basin area
103,7km²
Upstream area
1 156,8km²
Discharge
3,92m³/s
Mean elev.
82m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Wełna822 km²
- Bassin de Kanał Wapno-Laskownica232 km²
2 dept-equivalent regions (GADM L2)
- Wągrowiec77.0 km²73.9% of basin
- Oborniki27.1 km²26.1% of basin
2 intersecting protected areas
Dolina Wełny i Rynna Gołaniecko-Wągrowiecka
IUCN Not AssignedProtected Landscape Area
48.78 km² overlap
Dębina
IUCN IVNature Reserve
0.31 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
697 distinct species · 7 956 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 Wełna : 34 espèces reliées par 74 interactions GloBI sur 6 types (connectance 9.5%, filtre Serrano α=0.2). 6 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°
7,9°C
Annual rain
544mm
Moisture idx (CMI)
-0,25
Runoff
110mm/an
PET
726mm
AET
463mm
Mean slope
0,7°
Water table
62cm
Forest
15%
Crops
55%
Urban
8%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)