HydroBASINS lev08 watershed · #2080297430
Bassin de Nikajus
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 3 administrative regions across 2 countries : Daugavpils, Ignalinos, Zarasų
Sub-basin area
744,7km²
Upstream area
744,7km²
Discharge
5,93m³/s
Mean elev.
150m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 363.6 km²48.6% of basin
- 360.9 km²48.2% of basin
- 23.8 km²3.2% of basin
23 intersecting protected areas
Augšzeme
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
162.99 km² overlap
Augšzeme
IUCN Not ReportedSpecial Protection Area (Birds Directive)
162.99 km² overlap
Augšzeme
IUCN VProtected Landscape Area
162.98 km² overlap
State Park
52.68 km² overlap
Gražutės regioninis parkas
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
26.84 km² overlap
Svente
IUCN IINature Park
22.70 km² overlap
Smalvos ir Smalvykščio ežerai ir pelkės
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
22.25 km² overlap
Medumu ezeraine
IUCN IINature Park
14.92 km² overlap
Šiaurės rytinė Gražutės regioninio parko dalis
IUCN Not ReportedSpecial Protection Area (Birds Directive)
11.13 km² overlap
14 more protected areassorted by overlap area
Drūkšių ežero apylinkės
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.97 km² overlap
Daržėnų apylinkės
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.99 km² overlap
Pūsčios pelkė
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.90 km² overlap
Smalvelės upė ir šlapžemės
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.83 km² overlap
Nature Reserve
0.82 km² overlap
Smalvos šlapžemių kompleksas
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.82 km² overlap
Skujines ezers
IUCN IVNature Reserve
0.14 km² overlap
Medumu parks
IUCN IIINature Monument
0.10 km² overlap
Velniabalė
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.09 km² overlap
Nature Reserve
0.09 km² overlap
Medumu ezera salas
IUCN IVNature Reserve
0.03 km² overlap
Sventes ezera salas
IUCN IVNature Reserve
0.03 km² overlap
Bardinska ezers
IUCN IVNature Reserve
0.03 km² overlap
Medumu aleja
IUCN IIINature Monument
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 367 distinct species · 6 116 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Nikajus : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 80 interactions GloBI sur 6 types (connectance 8.9%, filtre Serrano α=0.2). 16 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°
5,6°C
Annual rain
658mm
Moisture idx (CMI)
0,03
Runoff
251mm/an
PET
641mm
AET
493mm
Mean slope
1,4°
Water table
105cm
Forest
28%
Crops
20%
Urban
2%
Protected
29%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)