HydroBASINS lev08 watershed · #2080331270
Bassin de Бирля
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 5 administrative regions : Cherdaklinskiy rayon, Dimitrovgrad, Melekesskiy rayon, Stavropol'skiy rayon, Water body
Sub-basin area
2 350,2km²
Upstream area
13 998,8km²
Discharge
61,65m³/s
Mean elev.
93m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Большой Авраль1468 km²
- Bassin de Большой Черемшан701 km²
5 dept-equivalent regions (GADM L2)
- Melekesskiy rayonUl'yanovsk · Russia1343.9 km²56.9% of basin
- Stavropol'skiy rayonSamara · Russia483.0 km²20.5% of basin
- Water bodyUl'yanovsk · Russia331.9 km²14.1% of basin
- Cherdaklinskiy rayonUl'yanovsk · Russia200.6 km²8.5% of basin
- DimitrovgradUl'yanovsk · Russia1.0 km²0.0% of basin
2 intersecting protected areas
CHeremshanskij
IUCN IVState Natural Zakaznik
61.59 km² overlap
Sengileevskie gory
IUCN IINational Park
5.34 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 631 distinct species · 6 475 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 Бирля : 20 espèces reliées par 27 interactions GloBI sur 4 types (connectance 8.3%, 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°
4,4°C
Annual rain
517mm
Moisture idx (CMI)
-0,26
Runoff
138mm/an
PET
699mm
AET
437mm
Mean slope
0,9°
Water table
91cm
Forest
21%
Crops
54%
Urban
2%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)