HydroBASINS lev08 watershed · #2080581510
Bassin de Осъм
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 8 administrative regions : Letnitsa, Levski, Lovech, Pleven, Pordim +3
Sub-basin area
1 177,3km²
Upstream area
1 643,1km²
Discharge
9,94m³/s
Mean elev.
339m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Бели Осъм241 km²
- Bassin de Черни Осъм224 km²
8 dept-equivalent regions (GADM L2)
- 715.8 km²60.7% of basin
- 234.7 km²19.9% of basin
- 134.0 km²11.4% of basin
- 46.3 km²3.9% of basin
- 29.9 km²2.5% of basin
- 10.9 km²0.9% of basin
- 7.8 km²0.7% of basin
- 0.0 km²0.0% of basin
22 intersecting protected areas
Devetashko plato
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
140.91 km² overlap
Mikre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
97.47 km² overlap
Mikre
IUCN Not ReportedSpecial Protection Area (Birds Directive)
84.13 km² overlap
Devetashko plato
IUCN Not ReportedSpecial Protection Area (Birds Directive)
78.92 km² overlap
Vasilyovska planina
IUCN Not ReportedSpecial Protection Area (Birds Directive)
52.84 km² overlap
Tsentralen Balkan - bufer
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
45.52 km² overlap
Obnova - Karaman dol
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.35 km² overlap
Shumata
IUCN VIProtected Site
0.20 km² overlap
Devetashka peshtera
IUCN IIINatural Monument
0.14 km² overlap
13 more protected areassorted by overlap area
Usoynata
IUCN VIProtected Site
0.11 km² overlap
Cherkovnoto branishte
IUCN VIProtected Site
0.06 km² overlap
Petko bunar
IUCN VIProtected Site
0.06 km² overlap
Natural Monument
0.06 km² overlap
Korluk
IUCN VIProtected Site
0.05 km² overlap
Leshtaka
IUCN VIProtected Site
0.04 km² overlap
Sopot
IUCN VIProtected Site
0.03 km² overlap
Liuliakata
IUCN VIProtected Site
0.03 km² overlap
Kodjakuru
IUCN VIProtected Site
0.02 km² overlap
Pozhara
IUCN VIProtected Site
0.00 km² overlap
Vodopad Loposhnitza
IUCN IIINatural Monument
0.00 km² overlap
Vodopad Koman
IUCN IIINatural Monument
0.00 km² overlap
Velchevo
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
794 distinct species · 8 062 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Осъм : 25 espèces reliées par 81 interactions GloBI sur 4 types (connectance 13.6%, filtre Serrano α=0.2). 10 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°
10,3°C
Annual rain
609mm
Moisture idx (CMI)
-0,36
Runoff
169mm/an
PET
961mm
AET
519mm
Mean slope
6,0°
Water table
378cm
Forest
35%
Crops
34%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)