HydroBASINS lev08 watershed · #2080338580
Bassin de Osa
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 8 administrative regions : Brodnica, Grudziądz, Grudziądz (City), Iława, Kwidzyn +3
Sub-basin area
1 626,4km²
Upstream area
1 626,5km²
Discharge
10,98m³/s
Mean elev.
92m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
8 dept-equivalent regions (GADM L2)
- 531.3 km²32.5% of basin
- Iława424.9 km²26.0% of basin
- 235.7 km²14.4% of basin
- 183.5 km²11.2% of basin
- 139.3 km²8.5% of basin
- Wąbrzeźno107.4 km²6.6% of basin
- 11.1 km²0.7% of basin
- Świecie0.0 km²0.0% of basin
30 intersecting protected areas
Doliny Osy i Gardęgi
IUCN Not AssignedProtected Landscape Area
159.39 km² overlap
Ostoja Iławska
IUCN Not ReportedSite of Community Importance (Habitats Directive)
56.60 km² overlap
Lasy Iławskie
IUCN Not ReportedSpecial Protection Area (Birds Directive)
54.49 km² overlap
Landscape Park
54.45 km² overlap
Morawski
IUCN Not AssignedProtected Landscape Area
40.71 km² overlap
Landscape Park
25.06 km² overlap
Dolina Osy
IUCN Not ReportedSite of Community Importance (Habitats Directive)
21.87 km² overlap
Doliny Drwęcy
IUCN Not AssignedProtected Landscape Area
19.58 km² overlap
Skarliński
IUCN Not AssignedProtected Landscape Area
18.42 km² overlap
21 more protected areassorted by overlap area
Góry Łosiowe
IUCN Not AssignedLandscape Park
18.02 km² overlap
Jeziora Goryńskiego
IUCN Not AssignedProtected Landscape Area
14.56 km² overlap
Strefy Krawędziowej Doliny Wisły
IUCN Not AssignedProtected Landscape Area
12.74 km² overlap
Jezioro Karaś
IUCN Not ReportedSite of Community Importance (Habitats Directive)
8.16 km² overlap
Karas Lake Nature Reserve
IUCN IbWetland of International Importance (Ramsar Site)
8.16 km² overlap
Jezioro Karaś
IUCN IVNature Reserve
8.16 km² overlap
Dolina Kakaju
IUCN Not ReportedSite of Community Importance (Habitats Directive)
6.91 km² overlap
Dolina Osy
IUCN IVNature Reserve
6.69 km² overlap
Ostoja Brodnicka
IUCN Not ReportedSite of Community Importance (Habitats Directive)
6.64 km² overlap
Torfowiskowo-Jeziorno-Leśny Zgniłka-Wieczno-Wronie
IUCN Not AssignedProtected Landscape Area
5.24 km² overlap
Sadliński
IUCN Not AssignedProtected Landscape Area
2.80 km² overlap
Aleje Pojezierza Iławskiego
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.73 km² overlap
Jamy
IUCN IVNature Reserve
1.07 km² overlap
Rogóźno Zamek
IUCN IVNature Reserve
0.74 km² overlap
Łosiowe Bagno
IUCN Not AssignedNature Reserve
0.52 km² overlap
Uroczysko Piotrowice
IUCN IVNature Reserve
0.50 km² overlap
Dolina Dolnej Wisły
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.38 km² overlap
Łabędź
IUCN IVNature Reserve
0.19 km² overlap
Czerwica
IUCN IVNature Reserve
0.13 km² overlap
Kociołek
IUCN IVNature Reserve
0.07 km² overlap
Wronie
IUCN IVNature Reserve
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 149 distinct species · 23 997 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Osa : 23 espèces reliées par 82 interactions GloBI sur 6 types (connectance 13.8%, filtre Serrano α=0.2). 12 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
584mm
Moisture idx (CMI)
-0,15
Runoff
205mm/an
PET
688mm
AET
489mm
Mean slope
1,2°
Water table
71cm
Forest
12%
Crops
68%
Urban
1%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)