HydroBASINS lev08 watershed · #2080588370
Bassin de Бели 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 4 administrative regions : Karlovo, Teteven, Troyan, Ugarchin
Sub-basin area
241,4km²
Upstream area
241,4km²
Discharge
1,76m³/s
Mean elev.
881m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 229.4 km²94.9% of basin
- 8.6 km²3.6% of basin
- 3.6 km²1.5% of basin
- 0.2 km²0.1% of basin
11 intersecting protected areas
Tsentralen Balkan - bufer
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
83.52 km² overlap
Tsentralen Balkan
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
27.17 km² overlap
Tsentralen Balkan
IUCN Not ReportedSpecial Protection Area (Birds Directive)
27.17 km² overlap
Tsentralen Balkan
IUCN IINational Park
27.17 km² overlap
Tsentralen Balkan bufer
IUCN Not ReportedSpecial Protection Area (Birds Directive)
15.72 km² overlap
Vasilyovska planina
IUCN Not ReportedSpecial Protection Area (Birds Directive)
14.22 km² overlap
Kozia stena
IUCN IaStrict Nature Reserve
7.77 km² overlap
Ancient and Primeval Beech Forests of the Carpathians and Other Regions of Europe
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
6.35 km² overlap
Dragoychev kamak
IUCN VIProtected Site
0.01 km² overlap
2 more protected areassorted by overlap area
Vodopad Banovski skok
IUCN IIINatural Monument
0.00 km² overlap
Vodopad Brambar skok
IUCN IIINatural Monument
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
553 distinct species · 2 623 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Бели Осъм : 22 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 98 interactions GloBI sur 6 types (connectance 17.5%, filtre Serrano α=0.2). 12 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°
7,7°C
Annual rain
680mm
Moisture idx (CMI)
-0,19
Runoff
224mm/an
PET
847mm
AET
574mm
Mean slope
16,2°
Water table
626cm
Forest
93%
Crops
2%
Urban
3%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)