HydroBASINS lev08 watershed · #2080331990
Bassin de Старый Калдаис
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 2 administrative regions : Inzenski rayon, Nikol'skiy rayon
Sub-basin area
114,5km²
Upstream area
1 551,9km²
Discharge
3,81m³/s
Mean elev.
212m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Старый Калдаис188 km²
- Bassin de Инза119 km²
2 dept-equivalent regions (GADM L2)
- Inzenski rayonUl'yanovsk · Russia62.1 km²53.9% of basin
- Nikol'skiy rayonPenza · Russia53.0 km²46.1% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
195 distinct species · 344 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 Старый Калдаис : 23 espèces reliées par 45 interactions GloBI sur 5 types (connectance 11.9%, 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°
4,2°C
Annual rain
557mm
Moisture idx (CMI)
-0,20
Runoff
100mm/an
PET
696mm
AET
464mm
Mean slope
2,2°
Water table
180cm
Forest
56%
Crops
31%
Urban
5%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)