HydroBASINS lev08 watershed · #2080331920
Bassin de Czarna Hańcza
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 5 administrative regions across 2 countries : Augustów, Hrodna, Sejny, Suwałki, Suwałki (City)
Sub-basin area
1 255km²
Upstream area
1 255km²
Discharge
7,95m³/s
Mean elev.
153m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 392.0 km²31.1% of basin
- 339.9 km²27.0% of basin
- 277.4 km²22.0% of basin
- 194.4 km²15.4% of basin
- 56.7 km²4.5% of basin
22 intersecting protected areas
Puszcza Augustowska
IUCN Not ReportedSpecial Protection Area (Birds Directive)
640.67 km² overlap
Ostoja Augustowska
IUCN Not ReportedSite of Community Importance (Habitats Directive)
475.47 km² overlap
Puszcza i Jeziora Augustowskie
IUCN Not AssignedProtected Landscape Area
328.30 km² overlap
Pojezierze Północnej Suwalszczyzny
IUCN Not AssignedProtected Landscape Area
170.64 km² overlap
Ostoja Wigierska
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
149.91 km² overlap
Wigierski Park Narodowy
IUCN VNational Park
140.19 km² overlap
Wigry National Park
IUCN IIWetland of International Importance (Ramsar Site)
140.15 km² overlap
Pojezierze Sejneńskie
IUCN Not AssignedProtected Landscape Area
92.11 km² overlap
Sopotskinskiy
IUCN IVNature Sanctuary or Partial Reserve
57.47 km² overlap
13 more protected areassorted by overlap area
Pojezierze Sejneńskie
IUCN Not ReportedSite of Community Importance (Habitats Directive)
46.38 km² overlap
Ostoja Suwalska
IUCN Not ReportedSite of Community Importance (Habitats Directive)
18.80 km² overlap
Landscape Park
18.75 km² overlap
Jeleniewo
IUCN Not ReportedSite of Community Importance (Habitats Directive)
16.63 km² overlap
Kuriańskie Bagno
IUCN IVNature Reserve
11.90 km² overlap
Jezioro Hańcza
IUCN IVNature Reserve
3.05 km² overlap
Starożyn
IUCN IVNature Reserve
2.98 km² overlap
Perkuć
IUCN IVNature Reserve
2.08 km² overlap
Mały Borek
IUCN IVNature Reserve
0.90 km² overlap
Bory nad Kanałem Augustowskim
IUCN Not AssignedNature Reserve
0.27 km² overlap
Dolina Biebrzy
IUCN Not AssignedProtected Landscape Area
0.07 km² overlap
Cmentarzysko Jaćwingów
IUCN IVNature Reserve
0.03 km² overlap
Nature Reserve
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 309 distinct species · 75 752 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 Czarna Hańcza : 24 espèces reliées par 68 interactions GloBI sur 4 types (connectance 16.7%, filtre Serrano α=0.2). 5 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°
6,3°C
Annual rain
591mm
Moisture idx (CMI)
-0,13
Runoff
200mm/an
PET
684mm
AET
494mm
Mean slope
1,3°
Water table
117cm
Forest
48%
Crops
31%
Urban
1%
Protected
53%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)