HydroBASINS lev08 watershed · #2080349020
Bassin de Brda
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 6 administrative regions : Bydgoszcz, Bydgoszcz (City), Nakło, Sępólno, Tuchola +1
Sub-basin area
1 070,9km²
Upstream area
4 496,2km²
Discharge
30m³/s
Mean elev.
94m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sępolna267 km²
- Bassin de Bysławska Struga60 km²
6 dept-equivalent regions (GADM L2)
- 652.4 km²60.7% of basin
- Świecie132.0 km²12.3% of basin
- 121.1 km²11.3% of basin
- Tuchola104.6 km²9.7% of basin
- 47.8 km²4.4% of basin
- 17.5 km²1.6% of basin
15 intersecting protected areas
Zalewu Koronowskiego
IUCN Not AssignedProtected Landscape Area
211.70 km² overlap
Wydm Kotliny Toruńsko-Bydgoskiej część wschodnia i zachodnia
IUCN Not AssignedProtected Landscape Area
22.71 km² overlap
Rynny Jezior Byszewskich
IUCN Not AssignedProtected Landscape Area
17.71 km² overlap
Północnego Pasa Rekreacyjnego Miasta Bydgoszczy
IUCN Not AssignedProtected Landscape Area
14.07 km² overlap
Dolina Środkowej Noteci i Kanału Bydgoskiego
IUCN Not ReportedSpecial Protection Area (Birds Directive)
7.42 km² overlap
Bory Tucholskie
IUCN Not ReportedSpecial Protection Area (Birds Directive)
6.57 km² overlap
Dolina Noteci
IUCN Not ReportedSite of Community Importance (Habitats Directive)
6.50 km² overlap
Nadwiślański Park Krajobrazowy
IUCN Not AssignedLandscape Park
5.66 km² overlap
Landscape Park
2.02 km² overlap
6 more protected areassorted by overlap area
Dolina Dolnej Wisły
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.61 km² overlap
Bruchniewska Ostoja
IUCN Not AssignedNature Reserve
0.43 km² overlap
Augustowo
IUCN IVNature Reserve
0.07 km² overlap
Nature Reserve
0.06 km² overlap
Wąwelno
IUCN IVNature Reserve
0.04 km² overlap
Solecka Dolina Wisły
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 799 distinct species · 40 234 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Brda : 25 espèces reliées par 98 interactions GloBI sur 3 types (connectance 15.6%, filtre Serrano α=0.2). 11 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
561mm
Moisture idx (CMI)
-0,20
Runoff
142mm/an
PET
703mm
AET
474mm
Mean slope
0,9°
Water table
155cm
Forest
30%
Crops
47%
Urban
12%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)