HydroBASINS lev08 watershed · #2080277160
Bassin de Нерль
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 1 administrative regions : Kalyazinskiy rayon
Sub-basin area
6km²
Upstream area
2 689,6km²
Discharge
16,5m³/s
Mean elev.
119m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Сабля855 km²
- Bassin de Нерль143 km²
1 dept-equivalent regions (GADM L2)
- Kalyazinskiy rayonTver' · Russia6.1 km²100.0% of basin
1 intersecting protected areas
Kalyazinskij
IUCN IVState Natural Zakaznik
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
66 distinct species · 85 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 Нерль : 25 espèces reliées par 40 interactions GloBI sur 3 types (connectance 9.9%, filtre Serrano α=0.2). 4 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°
4,3°C
Annual rain
616mm
Moisture idx (CMI)
-0,02
Runoff
200mm/an
PET
628mm
AET
474mm
Mean slope
0,5°
Water table
25cm
Forest
0%
Crops
70%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)