HydroBASINS lev08 watershed · #2080365900
Bassin de Obra
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 7 administrative regions : Grodzisk Wielkopolski, Międzychód, Międzyrzecz, Nowy Tomyśl, Wolsztyn +2
Sub-basin area
1 011,4km²
Upstream area
4 943,8km²
Discharge
18,78m³/s
Mean elev.
67m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 3 basins
- Bassin de Mogilnica1091 km²
- Bassin de Czarna Woda687 km²
- Bassin de Środkowy Kanał Obry86 km²
7 dept-equivalent regions (GADM L2)
- 422.1 km²41.6% of basin
- Nowy Tomyśl278.0 km²27.4% of basin
- Wolsztyn229.5 km²22.6% of basin
- 45.3 km²4.5% of basin
- 30.4 km²3.0% of basin
- Grodzisk Wielkopolski8.7 km²0.9% of basin
- Międzychód1.2 km²0.1% of basin
18 intersecting protected areas
Rynna Jezior Obrzańskich
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
151.48 km² overlap
Jeziora Pszczewskie i Dolina Obry
IUCN Not ReportedSpecial Protection Area (Birds Directive)
146.40 km² overlap
Pojezierze Sławskie, Pradolina Obry i Rynna Zbąszyńska
IUCN Not AssignedProtected Landscape Area
114.46 km² overlap
Landscape Park
95.91 km² overlap
Gorzycko
IUCN Not AssignedProtected Landscape Area
76.95 km² overlap
I Międzyrzecz-Trzciel
IUCN Not AssignedProtected Landscape Area
55.69 km² overlap
Miedzichowski Park Krajobrazowy
IUCN Not AssignedLandscape Park
14.37 km² overlap
Rynna Paklicy i Ołoboku
IUCN Not AssignedProtected Landscape Area
10.97 km² overlap
Dolina Obry
IUCN Not AssignedProtected Landscape Area
6.15 km² overlap
9 more protected areassorted by overlap area
Zbąszyńska Dolina Obry
IUCN Not AssignedProtected Landscape Area
5.50 km² overlap
Bory Babimojskie
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.22 km² overlap
Nature Reserve
2.37 km² overlap
H (Międzychód)
IUCN Not AssignedProtected Landscape Area
1.14 km² overlap
Nature Reserve
0.26 km² overlap
Nature Reserve
0.15 km² overlap
Rybojady
IUCN IVNature Reserve
0.06 km² overlap
Dąbrowa na Wyspie
IUCN IVNature Reserve
0.04 km² overlap
Rynny Obrzycko-Obrzańskie
IUCN Not AssignedProtected Landscape Area
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 764 distinct species · 9 958 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 Obra : 25 espèces reliées par 71 interactions GloBI sur 4 types (connectance 15.3%, filtre Serrano α=0.2). 6 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°
8,8°C
Annual rain
549mm
Moisture idx (CMI)
-0,26
Runoff
130mm/an
PET
738mm
AET
466mm
Mean slope
1,1°
Water table
111cm
Forest
49%
Crops
34%
Urban
1%
Protected
22%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)