HydroBASINS lev08 watershed · #2080009080
Bassin de Велека
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 across 2 countries : Kofçaz, Malko Tarnovo, Merkez, Primorsko, Sozopol +2
Sub-basin area
1 073,7km²
Upstream area
1 073,7km²
Discharge
4,95m³/s
Mean elev.
328m
Administrative coverage
7 dept-equivalent regions (GADM L2)
- Malko TarnovoBurgas · Bulgaria598.2 km²55.6% of basin
- 190.2 km²17.7% of basin
- 175.6 km²16.3% of basin
- Merkez100.7 km²9.4% of basin
- 3.7 km²0.3% of basin
- 3.5 km²0.3% of basin
- 3.4 km²0.3% of basin
27 intersecting protected areas
Strandzha
IUCN VNature Park
798.88 km² overlap
Strandzha
IUCN Not ReportedSpecial Protection Area (Birds Directive)
798.88 km² overlap
Strandzha
IUCN Not ReportedSite of Community Importance (Habitats Directive)
794.03 km² overlap
Gramatikovo
IUCN Not AssignedState Game Husbandries
162.90 km² overlap
Veleka
IUCN VIProtected Site
15.35 km² overlap
Ustie na Veleka
IUCN VIProtected Site
12.93 km² overlap
Vitanovo
IUCN IaStrict Nature Reserve
11.06 km² overlap
Paroria
IUCN VIProtected Site
9.98 km² overlap
Sredoka
IUCN IaStrict Nature Reserve
6.12 km² overlap
18 more protected areassorted by overlap area
Silkosia
IUCN IaStrict Nature Reserve
3.99 km² overlap
Petrova niva
IUCN VIProtected Site
2.32 km² overlap
Mechite dolove
IUCN VIProtected Site
2.25 km² overlap
Gradev sredok
IUCN VIProtected Site
1.60 km² overlap
Bosna
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.49 km² overlap
Krivinizovo
IUCN VIProtected Site
1.30 km² overlap
Gorna Elenitsa
IUCN VIProtected Site
0.97 km² overlap
Moriane
IUCN VIProtected Site
0.95 km² overlap
Derventski vazvishenia 2
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.72 km² overlap
Bosna
IUCN VIProtected Site
0.54 km² overlap
Marina rechka
IUCN VIProtected Site
0.42 km² overlap
Bataka
IUCN VIProtected Site
0.40 km² overlap
Natural Monument
0.24 km² overlap
Kalkata
IUCN VIProtected Site
0.19 km² overlap
Protected Site
0.14 km² overlap
Elenina dupka
IUCN IIINatural Monument
0.07 km² overlap
Dokuzak
IUCN VIProtected Site
0.02 km² overlap
Natural Monument
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 414 distinct species · 9 190 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 Велека : 18 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 62 interactions GloBI sur 3 types (connectance 15.3%, filtre Serrano α=0.2). 11 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°
12,0°C
Annual rain
632mm
Moisture idx (CMI)
-0,34
Runoff
166mm/an
PET
966mm
AET
535mm
Mean slope
8,0°
Water table
423cm
Forest
91%
Crops
5%
Urban
0%
Protected
74%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)