HydroBASINS lev08 watershed · #2080323170
Bassin de Свияга
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 : Maynskiy rayon, Sengileevskiy rayon, Teren'gul'skiy rayon, Ul'yanovsk, Ul'yanovskiy rayon
Sub-basin area
484km²
Upstream area
3 646,8km²
Discharge
12,01m³/s
Mean elev.
165m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Свияга2173 km²
- Bassin de Гуща990 km²
5 dept-equivalent regions (GADM L2)
- Ul'yanovskiy rayonUl'yanovsk · Russia374.3 km²77.0% of basin
- Ul'yanovskUl'yanovsk · Russia78.4 km²16.1% of basin
- Sengileevskiy rayonUl'yanovsk · Russia18.2 km²3.8% of basin
- Teren'gul'skiy rayonUl'yanovsk · Russia13.5 km²2.8% of basin
- Maynskiy rayonUl'yanovsk · Russia1.8 km²0.4% of basin
5 intersecting protected areas
Ecological and Recreational Zone
0.56 km² overlap
PKO Molodezhnyj
IUCN Not ReportedLandscape Park
0.14 km² overlap
PKO Sem`i Ul`yanovyh
IUCN Not ReportedLandscape Park
0.02 km² overlap
PKO Vinnovskaya roshha
IUCN Not ReportedLandscape Park
0.02 km² overlap
PKO Pobedy
IUCN Not ReportedLandscape Park
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 503 distinct species · 9 957 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Свияга : 30 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 115 interactions GloBI sur 6 types (connectance 12.2%, filtre Serrano α=0.2). 14 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°
4,1°C
Annual rain
523mm
Moisture idx (CMI)
-0,24
Runoff
105mm/an
PET
692mm
AET
442mm
Mean slope
1,3°
Water table
134cm
Forest
14%
Crops
50%
Urban
17%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)