Ontologia

HydroBASINS lev08 watershed · #2080600550

Bassin de Калница

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 : Elhovo, Nova Zagora, Sliven, Svilengrad, Topolovgrad +2

Pfafstetter: 21302402

Sub-basin area

852,3km²

Upstream area

852,3km²

Discharge

2,11m³/s

Mean elev.

198m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Тунджа1201 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

7 dept-equivalent regions (GADM L2)

6 intersecting protected areas

  • Tundzha

    IUCN Not Assigned

    State Game Husbandries

    470.54 km² overlap

  • Sakar

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    274.60 km² overlap

  • Topolovgrad

    IUCN Not Assigned

    State Game Husbandries

    221.99 km² overlap

  • Sakar

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    175.44 km² overlap

  • Sveti Iliyski vazvishenia

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    28.69 km² overlap

  • Kermenski vazvishenia

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    3.01 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

527 distinct species · 8 361 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

8 361 obs · 21 cellules
Obs. / cellule
≥ 2 101
897–2 100
384–896
253–383
< 253

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 34 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Калница : 24 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 69 interactions GloBI sur 4 types (connectance 12.3%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
69
Connectance
0.123
Patrimoniales
2
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

12,1°C

Annual rain

608mm

Moisture idx (CMI)

-0,41

Runoff

78mm/an

PET

1 027mm

AET

516mm

Mean slope

2,7°

Water table

223cm

Forest

5%

Crops

49%

Urban

0%

Protected

26%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)