HydroBASINS lev08 watershed · #2080309060
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 4 administrative regions : Apastovskiy rayon, Buinskiy rayon, Tetyushskiy rayon, Yal'chikskiy rayon
Sub-basin area
565km²
Upstream area
9 872,1km²
Discharge
32,48m³/s
Mean elev.
124m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Карла981 km²
- Bassin de Свияга297 km²
4 dept-equivalent regions (GADM L2)
- 414.5 km²73.0% of basin
- 81.5 km²14.4% of basin
- 40.5 km²7.1% of basin
- 31.0 km²5.5% of basin
2 intersecting protected areas
Reka Sviyaga
IUCN IIINatural Monument
29.05 km² overlap
Zeya bujlary
IUCN IVState Natural Zakaznik
2.46 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
48 distinct species · 64 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 12 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 : 10 espèces reliées par 7 interactions GloBI sur 3 types (connectance 10.6%, filtre Serrano α=0.2). 2 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
532mm
Moisture idx (CMI)
-0,21
Runoff
124mm/an
PET
670mm
AET
448mm
Mean slope
1,3°
Water table
125cm
Forest
6%
Crops
63%
Urban
0%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)