HydroBASINS lev08 watershed · #2080341290
Bassin de Sępolna
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 : Bydgoszcz, Sępólno, Tuchola, Złotów
Sub-basin area
266,8km²
Upstream area
266,8km²
Discharge
1,36m³/s
Mean elev.
128m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 162.4 km²60.6% of basin
- 77.5 km²28.9% of basin
- Tuchola28.0 km²10.4% of basin
- Złotów0.1 km²0.0% of basin
10 intersecting protected areas
Landscape Park
119.73 km² overlap
Dolina Łobżonki
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
12.58 km² overlap
Zalewu Koronowskiego
IUCN Not AssignedProtected Landscape Area
12.52 km² overlap
Doliny rzeki Sępolenki
IUCN Not AssignedProtected Landscape Area
3.01 km² overlap
Bagno Głusza
IUCN IVNature Reserve
1.67 km² overlap
Dęby Krajeńskie
IUCN IVNature Reserve
0.28 km² overlap
Buczyna
IUCN IVNature Reserve
0.20 km² overlap
Lutowo
IUCN IVNature Reserve
0.17 km² overlap
Dolina Łobżonki i Bory Kujańskie
IUCN Not AssignedProtected Landscape Area
0.09 km² overlap
1 more protected areassorted by overlap area
Gaj Krajeński
IUCN IVNature Reserve
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
990 distinct species · 3 097 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Sępolna : 27 espèces reliées par 60 interactions GloBI sur 5 types (connectance 12.9%, filtre Serrano α=0.2). 4 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°
7,3°C
Annual rain
592mm
Moisture idx (CMI)
-0,14
Runoff
164mm/an
PET
687mm
AET
495mm
Mean slope
1,1°
Water table
68cm
Forest
11%
Crops
69%
Urban
3%
Protected
46%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)