HydroBASINS lev08 watershed · #2080347580
Bassin de Narew
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 : Białystok, Białystok (City), Bielsk, Wysokie Mazowieckie
Sub-basin area
1 194,8km²
Upstream area
4 297,6km²
Discharge
23,32m³/s
Mean elev.
134m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Narew768 km²
- Bassin de Orlanka515 km²
4 dept-equivalent regions (GADM L2)
- 812.5 km²67.7% of basin
- 214.7 km²17.9% of basin
- 161.4 km²13.5% of basin
- 11.1 km²0.9% of basin
9 intersecting protected areas
Bagienna Dolina Narwi
IUCN Not ReportedSpecial Protection Area (Birds Directive)
231.41 km² overlap
Dolina Górnej Narwi
IUCN Not ReportedSpecial Protection Area (Birds Directive)
73.41 km² overlap
Ostoja w Dolinie Górnej Narwi
IUCN Not ReportedSite of Community Importance (Habitats Directive)
73.41 km² overlap
Narwiańskie Bagna
IUCN Not ReportedSite of Community Importance (Habitats Directive)
68.30 km² overlap
Narew River National Park
IUCN Not ReportedWetland of International Importance (Ramsar Site)
68.05 km² overlap
Narwiański Park Narodowy
IUCN Not AssignedNational Park
68.05 km² overlap
Dolina Narwi
IUCN Not AssignedProtected Landscape Area
54.14 km² overlap
Strabla
IUCN Not AssignedNature Reserve
0.92 km² overlap
Murawy w Haćkach
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.36 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 215 distinct species · 24 878 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Narew : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 90 interactions GloBI sur 4 types (connectance 13.5%, filtre Serrano α=0.2). 9 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°
6,9°C
Annual rain
566mm
Moisture idx (CMI)
-0,21
Runoff
149mm/an
PET
713mm
AET
479mm
Mean slope
0,9°
Water table
78cm
Forest
15%
Crops
49%
Urban
4%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)