HydroBASINS lev08 watershed · #2080338950
Bassin de Уса
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 : Kuzovatovskiy rayon, Shigonskiy rayon, Syzranskiy rayon, Teren'gul'skiy rayon
Sub-basin area
652,1km²
Upstream area
652,1km²
Discharge
2,26m³/s
Mean elev.
194m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- Teren'gul'skiy rayonUl'yanovsk · Russia342.5 km²52.3% of basin
- Syzranskiy rayonSamara · Russia176.7 km²27.0% of basin
- Kuzovatovskiy rayonUl'yanovsk · Russia119.8 km²18.3% of basin
- Shigonskiy rayonSamara · Russia15.9 km²2.4% of basin
7 intersecting protected areas
Rachejskaya tajga
IUCN IIINatural Monument
9.68 km² overlap
Sem` klyuchej
IUCN IIINatural Monument
4.94 km² overlap
Gremyachij
IUCN IIINatural Monument
4.46 km² overlap
Natural Monument
2.79 km² overlap
Skripinskie Kuchury
IUCN IIINatural Monument
2.63 km² overlap
Istoki reki Usy
IUCN IIINatural Monument
2.25 km² overlap
Rachejskie skaly
IUCN IIINatural Monument
1.15 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
360 distinct species · 821 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 Уса : 29 espèces reliées par 55 interactions GloBI sur 6 types (connectance 8.3%, 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°
4,3°C
Annual rain
514mm
Moisture idx (CMI)
-0,28
Runoff
109mm/an
PET
710mm
AET
436mm
Mean slope
2,0°
Water table
180cm
Forest
30%
Crops
52%
Urban
0%
Protected
19%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)