HydroBASINS lev08 watershed · #2080316780
Bassin de Цильна
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 : Buinskiy rayon, Drozhzhanovskiy rayon, Shemurshinskiy rayon, Tsil'ninskiy rayon, Ul'yanovskiy rayon
Sub-basin area
805,6km²
Upstream area
805,7km²
Discharge
2,49m³/s
Mean elev.
161m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 482.6 km²59.6% of basin
- Tsil'ninskiy rayonUl'yanovsk · Russia308.6 km²38.1% of basin
- 10.8 km²1.3% of basin
- 4.1 km²0.5% of basin
- Ul'yanovskiy rayonUl'yanovsk · Russia3.0 km²0.4% of basin
2 intersecting protected areas
Istok reki Cil`ny
IUCN IIINatural Monument
1.40 km² overlap
Bibi-Ajsha
IUCN IIINatural Monument
0.56 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
125 distinct species · 176 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Цильна : 32 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 43 interactions GloBI sur 6 types (connectance 6.1%, 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°
3,9°C
Annual rain
533mm
Moisture idx (CMI)
-0,21
Runoff
98mm/an
PET
674mm
AET
449mm
Mean slope
1,3°
Water table
151cm
Forest
1%
Crops
67%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)