HydroBASINS lev08 watershed · #2080304850
Bassin de Усвяча
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 6 administrative regions across 2 countries : Haradok, Kun'inskiy rayon, Usvyatskiy rayon, Velikolukskiy rayon, Velizhskiy rayon +1
Sub-basin area
2 396,7km²
Upstream area
2 396,7km²
Discharge
20,24m³/s
Mean elev.
170m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
6 dept-equivalent regions (GADM L2)
- Kun'inskiy rayonPskov · Russia655.9 km²27.2% of basin
- Usvyatskiy rayonPskov · Russia637.1 km²26.5% of basin
- 606.4 km²25.2% of basin
- 243.9 km²10.1% of basin
- Velizhskiy rayonSmolensk · Russia221.6 km²9.2% of basin
- Velikolukskiy rayonPskov · Russia43.1 km²1.8% of basin
4 intersecting protected areas
Torfyanik Drozdovskij Moh
IUCN IIINatural Monument
14.26 km² overlap
Torfyanik Logunovskij Moh
IUCN IIINatural Monument
12.23 km² overlap
Zapolskiy
IUCN IVNature Sanctuary or Partial Reserve
8.74 km² overlap
Korytenskiy Mokh
IUCN IVNature Sanctuary or Partial Reserve
1.55 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
655 distinct species · 1 098 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Усвяча : 24 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 52 interactions GloBI sur 4 types (connectance 9.8%, 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°
4,8°C
Annual rain
637mm
Moisture idx (CMI)
-0,02
Runoff
260mm/an
PET
651mm
AET
493mm
Mean slope
0,9°
Water table
67cm
Forest
81%
Crops
6%
Urban
0%
Protected
14%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)