HydroBASINS lev08 watershed · #2080369380
Bassin de Большой Иргиз
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 : Bol'shechernigovskiy rayon, Bol'sheglushitskiy rayon, Perelyubskiy rayon
Sub-basin area
604,7km²
Upstream area
2 339,2km²
Discharge
5,08m³/s
Mean elev.
101m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Большая Глушица1033 km²
- Bassin de Большой Иргиз702 km²
3 dept-equivalent regions (GADM L2)
- Bol'shechernigovskiy rayonSamara · Russia464.3 km²76.5% of basin
- Bol'sheglushitskiy rayonSamara · Russia141.4 km²23.3% of basin
- 1.4 km²0.2% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
265 distinct species · 626 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 Большой Иргиз : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 44 interactions GloBI sur 4 types (connectance 8.9%, filtre Serrano α=0.2). 5 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°
4,9°C
Annual rain
452mm
Moisture idx (CMI)
-0,42
Runoff
79mm/an
PET
784mm
AET
386mm
Mean slope
0,8°
Water table
132cm
Forest
0%
Crops
70%
Urban
0%
Protected
23%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)