HydroBASINS lev08 watershed · #2080364680
Bassin de Избалык
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 : Nikolaevskiy rayon, Pavlovskiy rayon, Starokulatkinskiy rayon, Vol'skiy rayon
Sub-basin area
939,8km²
Upstream area
939,8km²
Discharge
5,28m³/s
Mean elev.
200m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- Pavlovskiy rayonUl'yanovsk · Russia382.8 km²40.6% of basin
- Starokulatkinskiy rayonUl'yanovsk · Russia340.1 km²36.0% of basin
- 219.6 km²23.3% of basin
- Nikolaevskiy rayonUl'yanovsk · Russia1.1 km²0.1% of basin
2 intersecting protected areas
Starokulatkinskij
IUCN IVState Natural Zakaznik
99.14 km² overlap
Hvalynskij
IUCN IINational Park
4.85 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 042 distinct species · 2 739 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Избалык : 22 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 41 interactions GloBI sur 6 types (connectance 8.8%, filtre Serrano α=0.2). 9 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
579mm
Moisture idx (CMI)
-0,23
Runoff
177mm/an
PET
747mm
AET
476mm
Mean slope
2,7°
Water table
233cm
Forest
30%
Crops
52%
Urban
1%
Protected
78%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)