HydroBASINS lev08 watershed · #2080318820
Bassin de Сура
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 : Atyashevskiy rayon, Dubenskiy rayon, Karsunskiy rayon, Surskiy rayon
Sub-basin area
463,1km²
Upstream area
28 764,2km²
Discharge
118,93m³/s
Mean elev.
149m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Чеберчинка484 km²
- Bassin de Сура452 km²
4 dept-equivalent regions (GADM L2)
- Surskiy rayonUl'yanovsk · Russia356.4 km²76.6% of basin
- 93.3 km²20.1% of basin
- Karsunskiy rayonUl'yanovsk · Russia15.0 km²3.2% of basin
- 0.4 km²0.1% of basin
1 intersecting protected areas
Surskij im.S.A.Buturlina
IUCN IVState Natural Zakaznik
63.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
677 distinct species · 2 020 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Сура : 24 espèces reliées par 87 interactions GloBI sur 4 types (connectance 11.2%, filtre Serrano α=0.2). 16 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°
4,2°C
Annual rain
533mm
Moisture idx (CMI)
-0,22
Runoff
95mm/an
PET
681mm
AET
449mm
Mean slope
1,8°
Water table
153cm
Forest
30%
Crops
43%
Urban
2%
Protected
24%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)