HydroBASINS lev08 watershed · #2080368010
Bassin de Toczna
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 3 administrative regions : Siedlce, Siemiatycze, Łosice
Sub-basin area
328,9km²
Upstream area
328,9km²
Discharge
1,28m³/s
Mean elev.
157m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- Łosice276.2 km²83.7% of basin
- 53.9 km²16.3% of basin
- 0.0 km²0.0% of basin
7 intersecting protected areas
Landscape Park
18.47 km² overlap
Nadbużański Obszar Chronionego Krajobrazu
IUCN Not AssignedProtected Landscape Area
12.15 km² overlap
Ostoja Nadbużańska
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.56 km² overlap
Podlaski Przełom Bugu
IUCN VLandscape Park
6.23 km² overlap
Dolina Dolnego Bugu
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.22 km² overlap
Toczna
IUCN Not AssignedNature Reserve
0.05 km² overlap
Dolina Bugu
IUCN Not AssignedProtected Landscape Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
533 distinct species · 1 967 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 Toczna : 20 espèces reliées par 137 interactions GloBI sur 5 types (connectance 24.4%, filtre Serrano α=0.2). 14 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°
7,1°C
Annual rain
548mm
Moisture idx (CMI)
-0,25
Runoff
123mm/an
PET
727mm
AET
467mm
Mean slope
1,0°
Water table
89cm
Forest
2%
Crops
63%
Urban
2%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)