HydroBASINS lev08 watershed · #2080346060
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 7 administrative regions : Białystok, Kolno, Mońki, Wysokie Mazowieckie, Zambrów +2
Sub-basin area
1 336,5km²
Upstream area
15 662,2km²
Discharge
80,49m³/s
Mean elev.
131m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Wissa1152 km²
- Bassin de Narew123 km²
7 dept-equivalent regions (GADM L2)
- 636.1 km²47.4% of basin
- 514.9 km²38.4% of basin
- 99.0 km²7.4% of basin
- 50.0 km²3.7% of basin
- 32.7 km²2.4% of basin
- 8.9 km²0.7% of basin
- 0.4 km²0.0% of basin
20 intersecting protected areas
Ostoja Narwiańska
IUCN Not ReportedSite of Community Importance (Habitats Directive)
110.27 km² overlap
Bagno Wizna
IUCN Not ReportedSpecial Protection Area (Birds Directive)
96.19 km² overlap
Landscape Park
73.96 km² overlap
Przełomowa Dolina Narwi
IUCN Not ReportedSpecial Protection Area (Birds Directive)
73.96 km² overlap
Równiny Kurpiowskiej i Doliny Dolnej Narwi
IUCN Not AssignedProtected Landscape Area
58.34 km² overlap
Dolina Dolnej Narwi
IUCN Not ReportedSpecial Protection Area (Birds Directive)
54.41 km² overlap
Czerwony Bór
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
31.49 km² overlap
Dolina Biebrzy
IUCN Not ReportedSite of Community Importance (Habitats Directive)
20.44 km² overlap
Ostoja Biebrzańska
IUCN Not ReportedSpecial Protection Area (Birds Directive)
6.24 km² overlap
11 more protected areassorted by overlap area
Wielki Dział
IUCN IVNature Reserve
1.75 km² overlap
Dębowe Góry
IUCN IVNature Reserve
0.99 km² overlap
Bagno Wizna II
IUCN IVNature Reserve
0.80 km² overlap
Kalinowo
IUCN IVNature Reserve
0.70 km² overlap
Grabówka
IUCN IVNature Reserve
0.61 km² overlap
Mokradła Kolneńskie i Kurpiowskie
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.52 km² overlap
Rycerski Kierz
IUCN IVNature Reserve
0.42 km² overlap
Biebrzanski National Park
IUCN IIWetland of International Importance (Ramsar Site)
0.37 km² overlap
Biebrzański Park Narodowy
IUCN Not AssignedNational Park
0.37 km² overlap
Bagno Wizna I
IUCN IVNature Reserve
0.37 km² overlap
Dolina Pisy
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 787 distinct species · 26 141 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 Narew : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 83 interactions GloBI sur 4 types (connectance 19.1%, 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
569mm
Moisture idx (CMI)
-0,20
Runoff
149mm/an
PET
711mm
AET
481mm
Mean slope
1,1°
Water table
131cm
Forest
14%
Crops
50%
Urban
5%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)