HydroBASINS lev08 watershed · #2080350190
Bassin de Drwęca
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 : Brodnica, Golub-Dobrzyń, Lipno, Rypin, Toruń +1
Sub-basin area
1 083km²
Upstream area
4 057,2km²
Discharge
24,75m³/s
Mean elev.
96m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Drwęca391 km²
- Bassin de Rypienica338 km²
6 dept-equivalent regions (GADM L2)
- Golub-Dobrzyń458.9 km²42.2% of basin
- Rypin167.2 km²15.4% of basin
- 153.7 km²14.1% of basin
- Wąbrzeźno142.3 km²13.1% of basin
- 98.8 km²9.1% of basin
- 66.4 km²6.1% of basin
8 intersecting protected areas
Doliny Drwęcy
IUCN Not AssignedProtected Landscape Area
273.61 km² overlap
Drumliny Zbójeńskie
IUCN Not AssignedProtected Landscape Area
73.35 km² overlap
Torfowiskowo-Jeziorno-Leśny Zgniłka-Wieczno-Wronie
IUCN Not AssignedProtected Landscape Area
21.73 km² overlap
Niziny Ciechocińskiej
IUCN Not AssignedProtected Landscape Area
15.49 km² overlap
Dolina Drwęcy
IUCN Not ReportedSite of Community Importance (Habitats Directive)
10.26 km² overlap
Rzeka Drwęca
IUCN IVNature Reserve
2.51 km² overlap
Tomkowo
IUCN IVNature Reserve
0.16 km² overlap
Bobrowisko
IUCN IVNature Reserve
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 239 distinct species · 16 666 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Drwęca : 31 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 83 interactions GloBI sur 5 types (connectance 11.8%, filtre Serrano α=0.2). 7 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°
7,6°C
Annual rain
555mm
Moisture idx (CMI)
-0,23
Runoff
161mm/an
PET
719mm
AET
470mm
Mean slope
1,1°
Water table
127cm
Forest
14%
Crops
69%
Urban
1%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)