HydroBASINS lev08 watershed · #2080424690
Bassin de San
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 : Jarosław, Leżajsk, Przeworsk
Sub-basin area
251km²
Upstream area
8 443,9km²
Discharge
60,51m³/s
Mean elev.
192m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Lubaczówka1134 km²
- Bassin de San382 km²
3 dept-equivalent regions (GADM L2)
- Przeworsk212.0 km²84.2% of basin
- Jarosław37.8 km²15.0% of basin
- Leżajsk2.1 km²0.8% of basin
5 intersecting protected areas
Sieniawski Obszar Chronionego Krajobrazu
IUCN Not AssignedProtected Landscape Area
164.23 km² overlap
Lasy Sieniawskie
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.89 km² overlap
Starodub w Pełkiniach
IUCN Not ReportedSite of Community Importance (Habitats Directive)
5.75 km² overlap
Dolina Dolnego Sanu
IUCN Not ReportedSite of Community Importance (Habitats Directive)
4.47 km² overlap
Kuryłowski Obszar Chronionego Krajobrazu
IUCN Not AssignedProtected Landscape Area
1.82 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 031 distinct species · 14 030 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 San : 26 espèces reliées par 85 interactions GloBI sur 4 types (connectance 17.1%, 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°
7,8°C
Annual rain
598mm
Moisture idx (CMI)
-0,20
Runoff
171mm/an
PET
751mm
AET
509mm
Mean slope
0,9°
Water table
108cm
Forest
10%
Crops
50%
Urban
0%
Protected
66%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)