HydroBASINS lev08 watershed · #2080588320
Bassin de Черни 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 2 administrative regions : Karlovo, Troyan
Sub-basin area
224,3km²
Upstream area
224,5km²
Discharge
1,74m³/s
Mean elev.
1 085m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 188.1 km²83.7% of basin
- 36.6 km²16.3% of basin
8 intersecting protected areas
Tsentralen Balkan - bufer
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
87.45 km² overlap
Tsentralen Balkan
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
87.44 km² overlap
Tsentralen Balkan
IUCN IINational Park
87.44 km² overlap
Tsentralen Balkan
IUCN Not ReportedSpecial Protection Area (Birds Directive)
87.44 km² overlap
Tsentralen Balkan bufer
IUCN Not ReportedSpecial Protection Area (Birds Directive)
47.56 km² overlap
Steneto
IUCN IaStrict Nature Reserve
28.76 km² overlap
Ancient and Primeval Beech Forests of the Carpathians and Other Regions of Europe
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
24.26 km² overlap
Rusalka
IUCN Not AssignedState Game Husbandries
3.07 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
297 distinct species · 1 766 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Черни Осъм : 20 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 87 interactions GloBI sur 6 types (connectance 16.5%, filtre Serrano α=0.2). 13 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°
6,6°C
Annual rain
716mm
Moisture idx (CMI)
-0,10
Runoff
237mm/an
PET
802mm
AET
586mm
Mean slope
18,5°
Water table
716cm
Forest
92%
Crops
3%
Urban
1%
Protected
39%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)