HydroBASINS lev08 watershed · #2080326010
Bassin de Derežnyčia
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 2 administrative regions : Alytaus, Varėnos
Sub-basin area
378,8km²
Upstream area
2 777,4km²
Discharge
18,36m³/s
Mean elev.
135m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Verseka756 km²
- Bassin de Varėnė412 km²
2 dept-equivalent regions (GADM L2)
- 312.3 km²82.1% of basin
- 68.2 km²17.9% of basin
16 intersecting protected areas
Glėbo ežero apylinkės
IUCN Not ReportedSite of Community Importance (Habitats Directive)
6.81 km² overlap
Nature Reserve
4.00 km² overlap
Merkio upė
IUCN Not ReportedSite of Community Importance (Habitats Directive)
3.80 km² overlap
Nedzingio ežeras
IUCN Not ReportedSite of Community Importance (Habitats Directive)
2.79 km² overlap
Nature Reserve
2.53 km² overlap
Dainavos giria
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.40 km² overlap
Dzūkijos nacionalinis parkas
IUCN IIState Park
1.40 km² overlap
Derežnos upė
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.37 km² overlap
Kalesninkų ir Užukalnių apylinkės
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.27 km² overlap
7 more protected areassorted by overlap area
Dainavos giria
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.22 km² overlap
Alovės apylinkės
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.63 km² overlap
Nature Reserve
0.59 km² overlap
Burokaraisčio ežeras
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.39 km² overlap
Nature Reserve
0.28 km² overlap
Nedzingės ir Amarnios upės
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.21 km² overlap
Nature Reserve
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 832 distinct species · 29 940 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 15 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 Derežnyčia : 11 espèces reliées par 19 interactions GloBI sur 5 types (connectance 12.4%, filtre Serrano α=0.2). 7 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°
6,1°C
Annual rain
643mm
Moisture idx (CMI)
-0,08
Runoff
198mm/an
PET
700mm
AET
520mm
Mean slope
1,1°
Water table
85cm
Forest
62%
Crops
20%
Urban
2%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)