HydroBASINS lev08 watershed · #2080302870
Bassin de Улема
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 7 administrative regions : Apastovskiy rayon, Buinskiy rayon, Kamsko-Ust'inskiy rayon, Tetyushskiy rayon, Verkhneuslonskiy rayon +2
Sub-basin area
2 129,4km²
Upstream area
13 596,3km²
Discharge
48,08m³/s
Mean elev.
133m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Була1595 km²
- Bassin de Свияга565 km²
7 dept-equivalent regions (GADM L2)
- 771.6 km²36.1% of basin
- 591.3 km²27.6% of basin
- 460.9 km²21.5% of basin
- 293.8 km²13.7% of basin
- 16.5 km²0.8% of basin
- 4.9 km²0.2% of basin
- 0.2 km²0.0% of basin
13 intersecting protected areas
Reka Sviyaga
IUCN IIINatural Monument
57.60 km² overlap
Mestoobitanie hohlatki Marshalla
IUCN IIINatural Monument
7.93 km² overlap
Petrov ugol
IUCN IIINatural Monument
2.92 km² overlap
Starica Sviyagi
IUCN IIINatural Monument
1.90 km² overlap
Reka Ulema
IUCN IIINatural Monument
1.32 km² overlap
Sviyazhskij
IUCN IVState Natural Zakaznik
1.27 km² overlap
Natural Monument
1.16 km² overlap
Pojmy rek Sviyagi i Kubni
IUCN IIINatural Monument
0.79 km² overlap
Gornyj sosnyak
IUCN IIINatural Monument
0.70 km² overlap
4 more protected areassorted by overlap area
Kajbickie dubravy
IUCN IIINatural Monument
0.43 km² overlap
Natural Monument
0.42 km² overlap
Natural Monument
0.32 km² overlap
Reka Birlya
IUCN IIINatural Monument
0.09 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
559 distinct species · 1 442 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 Улема : 23 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 47 interactions GloBI sur 4 types (connectance 12.4%, 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°
3,8°C
Annual rain
537mm
Moisture idx (CMI)
-0,19
Runoff
147mm/an
PET
666mm
AET
451mm
Mean slope
1,8°
Water table
152cm
Forest
8%
Crops
63%
Urban
1%
Protected
19%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)