HydroBASINS lev08 watershed · #2080350370
Bassin de Gwda
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 4 administrative regions : Czarnków-Trzcianka, Piła, Wałcz, Złotów
Sub-basin area
279,3km²
Upstream area
4 726,1km²
Discharge
25,38m³/s
Mean elev.
92m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Piława1333 km²
- Bassin de Gwda0 km²
4 dept-equivalent regions (GADM L2)
- Piła260.8 km²93.0% of basin
- Złotów12.7 km²4.5% of basin
- Wałcz5.7 km²2.1% of basin
- 1.3 km²0.5% of basin
9 intersecting protected areas
Puszcza nad Gwdą
IUCN Not ReportedSpecial Protection Area (Birds Directive)
114.60 km² overlap
Pojezierze Wałeckie i Dolina Gwdy (woj. wielkopolskie)
IUCN Not AssignedProtected Landscape Area
103.65 km² overlap
Dolina Noteci
IUCN Not AssignedProtected Landscape Area
55.49 km² overlap
Ostoja Pilska
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
18.24 km² overlap
Dolina Noteci
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.52 km² overlap
Dolina Środkowej Noteci i Kanału Bydgoskiego
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.52 km² overlap
Kuźnik
IUCN IVNature Reserve
0.96 km² overlap
Torfowisko Kaczory
IUCN IVNature Reserve
0.33 km² overlap
Nietoperze w Starym Browarze
IUCN Not AssignedNature Reserve
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 048 distinct species · 4 355 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Gwda : 28 espèces reliées par 107 interactions GloBI sur 5 types (connectance 16.1%, filtre Serrano α=0.2). 9 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°
7,5°C
Annual rain
581mm
Moisture idx (CMI)
-0,17
Runoff
135mm/an
PET
698mm
AET
489mm
Mean slope
1,3°
Water table
203cm
Forest
57%
Crops
18%
Urban
13%
Protected
57%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)