HydroBASINS lev08 watershed · #2080344610
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 5 administrative regions : Brodnica, Działdowo, Iława, Nowe Miasto, Ostróda
Sub-basin area
693,2km²
Upstream area
1 900,2km²
Discharge
12,97m³/s
Mean elev.
131m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Drwęca699 km²
- Bassin de Trumpina508 km²
5 dept-equivalent regions (GADM L2)
- 359.0 km²51.6% of basin
- Iława227.9 km²32.7% of basin
- 76.9 km²11.0% of basin
- Działdowo32.0 km²4.6% of basin
- Ostróda0.3 km²0.0% of basin
23 intersecting protected areas
Dolina Dolnej Drwęcy
IUCN Not AssignedProtected Landscape Area
113.35 km² overlap
Welski Park Krajobrazowy
IUCN VLandscape Park
53.10 km² overlap
Doliny Rzeki Wel
IUCN Not AssignedProtected Landscape Area
52.54 km² overlap
Doliny Drwęcy
IUCN Not AssignedProtected Landscape Area
49.87 km² overlap
Dolina Drwęcy
IUCN Not ReportedSite of Community Importance (Habitats Directive)
36.95 km² overlap
Wzgórz Dylewskich
IUCN Not AssignedProtected Landscape Area
20.99 km² overlap
Przełomowa Dolina Rzeki Wel
IUCN Not ReportedSite of Community Importance (Habitats Directive)
11.91 km² overlap
Ostoja Radomno
IUCN Not ReportedSite of Community Importance (Habitats Directive)
9.31 km² overlap
Otuliny Welskiego Parku Krajobrazowego - Słup
IUCN Not AssignedProtected Landscape Area
7.44 km² overlap
14 more protected areassorted by overlap area
Landscape Park
6.34 km² overlap
Skarliński
IUCN Not AssignedProtected Landscape Area
6.31 km² overlap
Landscape Park
5.30 km² overlap
Dolina Kakaju
IUCN Not ReportedSite of Community Importance (Habitats Directive)
5.04 km² overlap
Bagienna Dolina Drwęcy
IUCN Not ReportedSpecial Protection Area (Birds Directive)
4.17 km² overlap
Landscape Park
2.82 km² overlap
Hartowiecki
IUCN Not AssignedProtected Landscape Area
1.63 km² overlap
Ostoja Dylewskie Wzgórza
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.53 km² overlap
Ostoja Brodnicka
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.47 km² overlap
Rzeka Drwęca
IUCN IVNature Reserve
1.44 km² overlap
Bagno Mostki
IUCN IVNature Reserve
1.33 km² overlap
Piekiełko
IUCN IVNature Reserve
0.25 km² overlap
Buchnowski
IUCN Not AssignedProtected Landscape Area
0.24 km² overlap
Retno
IUCN IVNature Reserve
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 415 distinct species · 19 229 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 21 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 : 17 espèces reliées par 55 interactions GloBI sur 5 types (connectance 23.8%, filtre Serrano α=0.2). 5 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°
7,2°C
Annual rain
611mm
Moisture idx (CMI)
-0,12
Runoff
211mm/an
PET
692mm
AET
507mm
Mean slope
1,7°
Water table
141cm
Forest
18%
Crops
61%
Urban
5%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)