Ontologia

HydroBASINS lev08 watershed · #2080299900

Bassin de Свольна

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 across 3 countries : Kraslava, Rasony, Sebezhskiy rayon, Vyerkhnyazdvinsk

89% lakePfafstetter: 24280402

Sub-basin area

1 548,2km²

Upstream area

1 548,5km²

Discharge

10,93m³/s

Mean elev.

138m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Дрыса48 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

4 dept-equivalent regions (GADM L2)

4 intersecting protected areas

  • Sebezhskij

    IUCN II

    National Park

    417.81 km² overlap

  • Osveiski

    IUCN IV

    Wetland of International Importance (Ramsar Site)

    270.20 km² overlap

  • Chyrvony Bor

    IUCN IV

    Nature Sanctuary or Partial Reserve

    236.88 km² overlap

  • Osveyskiy

    IUCN IV

    Nature Sanctuary or Partial Reserve

    193.39 km² overlap

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

Species present

1 868 distinct species · 7 518 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

7 518 obs · 50 cellules
Obs. / cellule
≥ 3 967
200–3 966
60–199
19–59
< 19

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

Ecological tissue

Sample of 43 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 Свольна : 34 espèces reliées par 85 interactions GloBI sur 4 types (connectance 9.4%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
43
Interactions affichées
85
Connectance
0.094
Patrimoniales
0
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°

5,2°C

Annual rain

637mm

Moisture idx (CMI)

0,00

Runoff

226mm/an

PET

638mm

AET

488mm

Mean slope

1,1°

Water table

86cm

Forest

62%

Crops

15%

Urban

0%

Protected

54%

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