HydroBASINS lev08 watershed · #2080383990
Bassin de Okrzejka
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 4 administrative regions : Garwolin, Kozienice, Ryki, Łuków
Sub-basin area
457km²
Upstream area
457km²
Discharge
1,99m³/s
Mean elev.
158m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- Garwolin268.2 km²58.5% of basin
- 157.6 km²34.4% of basin
- 32.9 km²7.2% of basin
- Kozienice0.1 km²0.0% of basin
6 intersecting protected areas
Nadwiślański (powiat garwoliński, miński i otwocki)
IUCN Not AssignedProtected Landscape Area
87.43 km² overlap
Bagna Orońskie
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.08 km² overlap
Dolina Środkowej Wisły
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.88 km² overlap
Czerwony Krzyż
IUCN IVNature Reserve
0.21 km² overlap
Torfy Orońskie
IUCN IVNature Reserve
0.12 km² overlap
Kopiec Kościuszki
IUCN IVNature Reserve
0.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
559 distinct species · 1 763 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Okrzejka : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 107 interactions GloBI sur 5 types (connectance 17.0%, filtre Serrano α=0.2). 8 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
531mm
Moisture idx (CMI)
-0,28
Runoff
135mm/an
PET
737mm
AET
454mm
Mean slope
0,9°
Water table
189cm
Forest
16%
Crops
56%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)